CLIAMS:1. A low pH dual phase bathing bar comprising
a. at least one transparent inner phase, and
b. at least one opaque outer phase
wherein the ratio of transparent phase to opaque phase ranges from 0.15: 0.85 to 0.85: 0.15; and wherein said dual phase bathing bar has high fatty acid content which ranges from 15-30% wt; and wherein the pH of said dual phase bathing bar is from 8.5 to 9.5
2. A low pH dual phase bathing bar comprising
a. at least one transparent outer phase and
b. at least one opaque inner phase
wherein the ratio of transparent phase to opaque phase ranges from 0.15: 0.85 to 0.85: 0.15; and wherein said dual phase bathing bar has high fatty acid content which ranges from 15-30% wt; and wherein the pH of said dual phase bathing bar is from 8.5 to 9.5.
3. The low pH dual phase bathing bar as claimed in claim 1 or 2, wherein said dual phase bathing bar is prepared at a temperature of less than 1000C.
4. The low pH dual phase bathing bar as claimed in claim 1 or 2, wherein the said opaque phase comprises surfactant, free fatty acids, emulsifiers, polymer, organic structurant, salt, water, oil, soap, preservatives, pH regulator and color/fragrance/emotive.
5. The low pH dual phase bathing bar as claimed in claim 1 or 2, wherein the said transparent phase comprises in-situ soap, surfactant, water, solvents, sucrose, organic oil, hydrotopes, preservatives and color/fragrance/emotive.
6. A method of preparing low pH dual phase bathing bar, wherein the opaque soap covers the transparent soap bar, comprising
a. Preparing transparent and the opaque soaps by the conventional methods;
b. Pouring said transparent soap in a mould to obtain a desired shape at a specific temperature ranging from 75-80°C;
c. Cooling said transparent soap mass at a temperature ranging from 40-60°C and pouring the pre casted opaque soap mass over it;
d. Pouring the remaining opaque soap over the transparent soap mass such that the opaque soap now completely covers the transparent soap;
e. The temperature at which the process is carried out ranges from 75-80°C such that the opaque soap has a pouring consistency;
f. Solidifying the soap mass and obtaining dual phase bathing bar.
7. A method of preparing low pH dual phase bathing bar, wherein the transparent soap covers the opaque soap bar, comprising
a. Preparing transparent and the opaque soaps by the conventional methods;
b. Pouring said opaque soap in a mould to obtain a desired shape at a specific temperature ranging from 75-80°C;
c. Cooling said opaque soap mass at a temperature ranging from 40-60°C and pouring the pre casted transparent soap mass over it;
d. Pouring the remaining transparent soap over the opaque soap mass such that the transparent soap now completely covers the opaque soap;
e. The temperature at which the process is carried out ranges from 75-80°C such that the transparent soap has a pouring consistency;
f. Solidifying the soap mass and obtaining dual phase bathing bar. ,TagSPECI:FIELD OF THE INVENTION
The present invention relates to soap bar, more particularly the present invention relates to Low pH dual phase transparent bathing bar and process for preparing the same. The present invention further relates to making the two phases (different masses) compatible to each other without loosing bar stability and compromising on the aesthetics or properties.
BACKGROUND & PRIOR ART OF THE INVENTION
Bathing bar with higher amount of FFA is widely accepted among the customers due to its mildness behavior and its ability to provide low pH and mild bathing experience. Preparation of low pH (neutral pH) opaque bathing bar with high amount of Free fatty acids (>15%) is well known state of the art. However it becomes a challenge to develop a transparent bathing bar having low pH as it involves incorporation of very high amount of free fatty acids (>15%). In several transparent bathing bar incorporation of fatty acids in its free form will lead to opacity due to crystal formation of higher chain length fatty acids (e.g. C16 to C18 fatty acids).

US 2001/0044394 disclose a transparent toilet bar with a dual-layer pattern of glycerin-based colored transparent soap formulations, and syndet-based soap compositions; and a method for producing the bar. The preferred embodiment of the bar is a dual-layer pattern with a glycerin layer on top and a syndet layer on the bottom.
However there is a need to develop a low pH transparent dual phase bathing bars having high amount of FFA while making the two phases compatible to each other without loosing bar stability and compromising on the aesthetics.
The object of the present invention is to obtain a transparent bathing bar with very high amount of FFA more so with higher chain of fatty acids (e.g. C16 to C18 fatty acids) to provide aesthetics and mildness (lower pH) benefits.
Further, another challenge is to develop a dual phase bathing bar having low pH as it involves incorporation of both opaque and transparent soap mass. Once the free fatty acids with higher chain length (C 16 to C18) is incorporated into the transparent soap mass its transparency decreases which leads to poor bar aesthetics.
Moreover, making of dual phase bathing bar involves complicated process which leads to high energy consumption, long batch times and low production yield. Therefore it is desirous to develop an energy efficient process for preparation of dual phase low pH transparent bathing bar.

Further there is a need to develop a dual phase cleansing bar which has a low pH while maintaining good transparency.

OBJECTS OF THE INVENTION
An object of the present invention is to overcome the drawbacks of the prior art.
Another object of the present invention is to provide a low pH transparent dual phase bathing bar having high amount of FFA (>15%)
Further it is the object of the present invention to provide a low pH dual phase transparent bathing bar having high amount of FFA which has two phases compatible to each other without loosing bar stability and compromising on the aesthetics.
Yet another object of the present invention is to provide a process for the preparation of a low pH dual phase bathing bar having high amount of FFA with improved sensorial.
Yet another object of the present invention is to provide a low pH dual phase bathing bar having high amount of FFA which is energy efficient and is prepared using a cost effective process.
Still another object of the present invention is to provide a dual phase bathing bar having high amount of FFA which is provides enhanced in-use and post use sensorial in terms of appearance likeability, good performance, foam quality, superior in use lather, post wash skin moisturization and post wash skin smoothness.
SUMMARY OF THE PRESENT INVENTION
An aspect of the present invention is to provide a dual phase bathing bar comprising
a. at least one transparent inner phase and
b. at least one opaque outer phase
wherein the ratio of transparent phase to opaque phase ranges from 0.15: 0.85 to 0.85: 0.15
wherein said dual phase bathing bar has high fatty acid content ranges from 15-30% wt
wherein the pH of said dual phase bathing bar is from 8.5 to 9.5.

Another aspect of the present invention is to provide a dual phase bathing bar comprising
a) at least one transparent outer phase and
b) at least one opaque inner phase
wherein the ratio of transparent phase to opaque phase ranges from 0.15: 0.85 to 0.85: 0.15
wherein said dual phase bathing bar has high fatty acid content ranges from 15-30% wt wherein the pH of said dual phase bathing bar is from 8.5 to 9.5.

Another aspect of the present invention is to provide a method of preparing low pH dual phase bathing bar, where in the transparent soap covers the opaque soap bar comprises:
a. The transparent and the opaque soaps are prepared by the conventional methods disclosed;
b. The opaque soap is then poured in a mould to obtain a desired shape at a temperature ranging from 75-80°C;
c. The opaque soap mass is now allowed to cool at a temperature ranging from 40-60°C and the pre casted transparent soap mass is then poured over it;
d. The remaining transparent soap is then poured over the opaque soap mass such that the transparent soap now completely covers the opaque soap;
e. The temperature at which the process is carried out ranges from 75-80°C such that the transparent soap has a pouring consistency;
f. The soap mass is then allowed to solidify and a dual phase bathing bar is obtained.
Yet another aspect of the present invention is to provide a method of preparing low pH dual phase bathing bar, where in the opaque soap covers the transparent soap bar comprises:
a. The transparent and the opaque soaps are prepared by the conventional methods disclosed;
b. The transparent soap is then poured in a mould to obtain a desired shape at a temperature ranging from 75-80°C;
c. The transparent soap mass is now allowed to cool at a temperature ranging from 40-60°C and the pre casted opaque soap mass is then poured over it;
d. The remaining opaque soap is then poured over the transparent soap mass such that the opaque soap now completely covers the transparent soap;
e. The temperature at which the process is carried out ranges from 75-80°C such that the transparent soap has a pouring consistency;
f. The soap mass is then allowed to solidify and a dual phase bathing bar is obtained.
DETAILED DESCRIPTION OF THE INVENTION
The invention describes a dual phase low pH transparent bathing bar composition comprising high amounts of FFA (>15%).
One embodiment of the present invention provides a low pH opaque dual-phase bathing bar comprising: the low pH as mentioned ranges from 8.5 to 9.5
(i) at least one inner phase; and
(ii) at least one outer phase
wherein said inner phase is opaque;
wherein said outer phase is transparent and
wherein the low pH opaque dual-phase bathing bar comprises high amounts of Free Fatty acid>15% w/w.

The composition of the inner opaque phase of the present invention comprises the following components:
The synthetic surfactants used in the present invention may be selected from a group comprising anionic surfactants, amphoteric surfactants, nonionic surfactants, and any combinations thereof. As it is well known in the art that surfactant materials can also be an emulsifier, the term “surfactant” does not exclude materials which also have emulsification properties
The anionic surfactants that may be used in the present invention include but are not limited to alkyl sulfates, anionic acyl sarcosinates, anionic alkyl sarcosinates, methyl acyl taurates, N-acyl glutamates, acyl isethionates, alkyl ether sulfates, alkyl sulfosuccinates, alkyl phosphate esters, ethoxylated alkyl phosphate esters, trideceth sulfates, protein condensates, mixtures of ethoxylated alkyl sulfates and the like. Alkyl chains for these surfactants are C8-22, preferably C10-18 and, more preferably, C12-14 alkyls.
The amphoteric surfactants which can be used in the compositions of the present invention are those which can be broadly described as derivatives of aliphatic secondary and tertiary amines in which the aliphatic radical can be straight chain or branched and wherein one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic water solubilizing group, e.g., carboxy, sulfonate, sulfate, phosphate, or phosphonate. Examples of compounds falling within this definition are sodium 3-dodecylaminopropionate, sodium 3-dodecylaminopropane sulfonate. Other amphoterics such as betaines are also useful in the present composition. Examples of betaines useful herein include the high alkyl betaines such as coco betaine, coco dimethyl carboxymethyl betaine, lauryl dimethyl carboxy-methyl betaine, lauryl dimethyl alpha-carboxyethyl betaine, cetyl dimethyl carboxymethyl betaine, lauryl bis-(2-hydroxyethyl)carboxy methyl betaine, stearyl bis-(2-hydroxypropyl)carboxymethyl betaine, oleyl dimethyl gamma-carboxypropyl betaine, lauryl bis-(2-hydro-xypropyl)alpha-carboxyet-hyl betaine, etc. The sulfobetaines may be represented by coco dimethyl sulfopropyl betaine, stearyl dimethyl sulfopropyl betaine, amido betaines, amidosulfobetaines, and the like.
The nonionic surfactants useful in this invention can be broadly defined as compounds produced by the condensation of alkylene oxide groups (hydrophilic in nature) with an organic hydrophobic compound, which may be aliphatic or alkyl aromatic in nature. Non-limiting examples of preferred nonionic surfactants for use herein are those selected form the group consisting of glucose amides, alkyl polyglucosides, sucrose cocoate, sucrose laurate, alkanolamides, ethoxylated alcohols and mixtures thereof. In a preferred embodiment the nonionic surfactant is selected from the group consisting of glyceryl monohydroxystearate, isosteareth-2, trideceth-3, hydroxystearic acid, propylene glycol stearate, PEG-2 stearate, sorbitan monostearate, glyceryl laurate, laureth-2, cocamide monoethanolamine, lauramide monoethanolamine, decyl glucoside and mixtures thereof. The composition of the present invention may also comprise one or more sugar based surfactants selected from but not limited to condensation products of long chain alcohols with sugar or starch polymers (e.g. decyl polyglucoside and lauryl polyglucoside), amides (e.g. cocoamide diethanolamine and cocoamide monoethanolamine), alkylene oxide derived surfactants (e.g. ceteth-6, ceteareth6, steareth-6, PEG-12 stearate, and PEG-200 glyceryl tallowate), Maltooligosyl Glucoside/Hydrogenated Starch Hydrolysate and mixtures thereof. Preferred sugar based surfactants include Maltooligosyl Glucoside/Hydrogenated Starch Hydrolysate and Alkyl polyglucoside.
The amount of surfactant required in the present composition ranges from 30-70% w/w.
The “free fatty acids” as used herein are selected from fatty acids with alkyl chain lengths of from C8 – C18. These may be selected from group of linear chained fatty acids, branched chain fatty acids, saturated and unsaturated fatty acids such as Caprylic, Capric, Lauric, Myristic, Palmitic, Stearic, Oleic, etc and mixtures thereof.
The concentration of free fatty acids ranges from 15-30 % w/w.
Emulsifiers may be added to compositions of the present invention can be of the W/O type or O/W type. The addition of an emulsifier allows the incorporation of hydrophilic components or agents into the wax phase. Preferred are non-ionic emulsifiers which typically have good skin compatibility. Non-ionic emulsifiers of the present invention may be selected from group comprising addition products of 2 to 50 mole of ethylene oxide and/or 0 to 20 moles propylene oxide to linear fatty alcohols having 8 to 40 C-atoms, to fatty acids with 12 to 40 C-atoms and to alkylphenols with 8 to 15 C-atoms in the alkyl rest; C12-18-fatty acid mono- and -diesters of addition products of 1 to 50 mole of ethylene oxide and glycerine; glycerine mono- and -diesters and sorbitan mono- and -diesters of saturated and unsaturated fatty acids with 6 to 22 C-atoms and their ethylene oxide addition products; alkyl mono- and -oligoglycosides with 8 to 22 C-atoms in the alkyl rest and their ethoxylated analogs; addition products of 7 to 60 mole of ethylene oxide to castor oil and/or hardened castor oil; Polyol- and in particular polyglycerine esters, such as e.g. polyol poly-12-hydroxystearate, polyglycerine polyricinoleate, polyglycerine diisostearate or polyglycerine dimerate. Also applicable are mixtures of compounds of several of these substance classes; addition products of 2 to 15 mole of ethylene oxide to castor oil and/or hardened castor oil; partial esters derived from linear, branch chained, unsaturated or saturated C6-C22-fatty acids, ricinoleic acid as well as 12-hydroxystearic acid and glycerine, polyglycerine, pentaerythrite, dipentaerythrit, sugar alcohols (e.g. sorbitol), alkylglucosides (e.g. methylglucoside, butylglucoside, laurylglucoside), as well as polyglucosides (e.g. cellulose), or mixed esters such as e.g. glyceryl stearate/citrate and glyceryl stearate/lactate;Wool wax alcohols; Polysiloxane-polyalkyl-polyether-copolymers and derivatives thereof; Mixed esters from pentaerythrite, fatty acids, citric acid and fatty alcohols and/or mixed esters of fatty acids with 6 to 22 C-atoms with methylglucose and polyoles, respectively glycerine or polyglycerine; Polyalkylene glycols
The amount of emulsifiers ranges from 0.5-10 %w/w,
According to the present invention polymers are starches such as corn starch, silicone polymers; water soluble polymers such as polyurethanes, polyacrylates, polyalkylene glycol with molecular weight between 200 and 20,000, preferably between 400 and 10,000 such as PEG 200, PEG 400, PEG600, PEG 1500, PEG 4000, PEG 6000, PEG 8000 and the like; anionic, zwitterionic, amphoteric and nonionic polymers that can be used are, for example, vinylacetate/crotonic acid-copolymers, vinylpyrrolidone/vinylacrylate-copolymers, vinylacetate/butylmaleate/ isobornylacrylate-copolymers, methylvinylether/maleic acid anhydride-copolymers and their esters, which are not cross-linked and with polyoles linked polyacrylacids which are cross-linked, acrylamidopropyltrimethylammonium chloride/ acrylate-copolymers, octylacrylamide/ methylmethacrylate/tert.butylaminoethylmethacrylate/2-hydroxypropylmethacrylate-copolymers, polyvinylpyrrolidone, vinylpyrrolidone/vinylacetate-copolymers, vinylpyrrolidone/ dimethylaminoethylmethacrylate/vinyl caprolactam-terpolymers as well as optionally derivatized cellulose ethers and silicones.
The amount of polymers ranges from 1-10 %w/w,
Organic structurant can be selected from the group comprising biopolymers such as starch, modified starch, guar gum, tamarind kernel polysaccharide or psyllium husk
The amount of organic structurant ranges from 0.5-5 % w/w,
Salts in accordance with the present invention is selected from group comprising sodium chloride, sodium sulfate, sodium lactate, sodium glycolate, sodium citrate, potassium chloride, potassium sulfate, magnesium chloride, calcium chloride and combinations thereof.
The amount of salt ranges from 0.1-0.5%w/w,
Water used in the composition ranges from 0.1-1 %w/w,
Preferred oil is selected from propylene glycol, glycerin, sorbitol, paraffin oil and the preferred oil is glycerin
The amount of oil ranges from 0.1-5%w/w,
Soap according to the present invention includes alkali metal salts of fatty acids such as sodium palmitate and sodium oleate (i.e. anionic surfactants). Among the soaps that are used herein may be saponified glycerides from plant or animal sources such as sodium palmate, sodium palm kernelate, sodium cocoate, sodium tallowate, potassium tallowate, sodium lardate and other alkali metal salt of C8-C22 single chained and branched carboxylic acids
Soaps are present in the concentration range of 10-25%w/w,
Preservatives according to the present invention include BHT, EDTA, phenoxy ethanol.
Preservatives are present in the concentration range of 0.01 to 0.1 %w/w,
pH regulator according to the present invention includes citric acid, lactic acid, oxalic acid, acetic acid etc.
pH regulator are present in the concentration range of 0.2 to 2 %w/w and
The colours can be selected from a group comprising C.I. Pigment Black 7 (C.I. 77266), C.I. Pigment Blue 15 (C.I. 74160), C.I. Pigment Blue 15:1 (C.I. 74160), C.I. Pigment Red 4 (C.I. 12085), C.I. Pigment Red 5 (C.I. 12490), C.I. Pigment Red 112 (C.I. 12370), C.I. Pigment Red 181 (C.I. 73360), C.I. Vat Red 1 , C.I. Pigment Green 7 (C.I. 74260), C.I. Pigment Violet 23 (C.I. 51319), C.I. Pigment Yellow 1 (C.I. 11680), C.I. Pigment Yellow 3 and the like
The fragrance may be selected from a group comprising musk oil, civet, castreum, ambergris, plant perfumes such as sandalwood oil, bergamot oil, lemon oil, lavender oil, sage oil, rosemary oil, peppermint oil, eucalyptus oil, menthol, camphor, verbena oil, citroneUa oil, cauout oil, salvia oil, clove oil, chamomiUe oil, sandalwood oil, costus oil, labdanum oil, broom extract, carrot seed extract, jasmine extract, minmosa extract, narcissus extract, oUbanum extract, rose extract and the like, and chemical substances such as acetophenonene, dimethyUnadane derivatives, naphthaline derivatives, aUyl caprate, α-amylcinnamic aldehyde, anethole, anisaldehyde, benzyl acetate, benzyl alcohol, benzyl propionate, borneol, cinnamyl acetate, cinnamyl alcohol, citral citronneUal, cumin aldehyde, cyclamen aldehyde, decanol, ethyl butyrate, ethyl caprate, ethyl cinnamate, ethyl vanillin, eugenol, geraniol, hexenol, α-hexylcinnamic aldehyde, hydroxycitrolneUal, indole, iso-amyl acetate, iso-amyl iso-valeratek iso-eugenol, nalol, linalyl acetate, p-methylacetophenone, methyl anthranilate, methyl dihydroasmonate, methyl eugenol, methyl-β-naphthol ketone, methylphenhlcarbinyl acetate, musk ketol, musk xylol, 2,5,6-nanodinol, γ-nanolactone, phenylacetoaldehydodimethyl acetate, β-phenylethyl alcohol, 3,3,5-trimethylcyclohexanol, γ- undecalactone, undecenal, vanillin and mixtures thereof.
The emotive may be selected from a group comprising , Houttuynia cordata extract, Phellodendron bark extract, melilot extract, dead nettle extract, licorice extract, peony root extract, soapwort extract, luffa extract, cinchona extract, strawberry geranium extract, sophora root extract, nuphar extract, fennel extract, primrose extract, rose extract, rehmannia root extract, lemon extract, lithospermum root extract, aloe extract, calamus root extract, eucalyptus extract, field horsetail extract, sage extract, thyme extract, tea extract, seaweed extract, cucumber extract, clove extract, bramble extract, lemon balm extract, carrot extract, horse chestnut extract, peach extract, peach leaf extract, mulberry extract, knapweed extract, hamamelis extract, placenta extract, thymic extract, silk extract, and licorice extract, blue lotus extract, sea mineral extract, blueberry extract, black currant extract and the like.
Color/fragrance/emotives in the concentration range of 0.1 to 2% w/w.
The composition of the outer transparent phase of the present invention comprises the following components:
In-situ Soap according to the present invention includes alkali metal salts of fatty acids such as sodium palmitate and sodium oleate (i.e. anionic surfactants). Among the soaps that are used herein may be saponified glycerides from plant or animal sources such as sodium palmate, sodium palm kernelate, sodium cocoate, sodium tallowate, potassium tallowate, sodium lardate and other alkali metal salt of C8-C22 single chained and branched carboxylic acids.
In-situ soap is present in the concentration range of 20-50% w/w.
The synthetic surfactants used in the present invention may be selected from a group comprising anionic surfactants, amphoteric surfactants, nonionic surfactants, and any combinations thereof. As it is well known in the art that surfactant materials can also be an emulsifier, the term “surfactant” does not exclude materials which also have emulsification properties.
The anionic surfactants that may be used in the present invention include but are not limited to alkyl sulfates, anionic acyl sarcosinates, anionic alkyl sarcosinates, methyl acyl taurates, N-acyl glutamates, acyl isethionates, alkyl ether sulfates, alkyl sulfosuccinates, alkyl phosphate esters, ethoxylated alkyl phosphate esters, trideceth sulfates, protein condensates, mixtures of ethoxylated alkyl sulfates and the like. Alkyl chains for these surfactants are C8-22, preferably C10-18 and, more preferably, C12-14 alkyls.
The amphoteric surfactants which can be used in the compositions of the present invention are those which can be broadly described as derivatives of aliphatic secondary and tertiary amines in which the aliphatic radical can be straight chain or branched and wherein one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic water solubilizing group, e.g., carboxy, sulfonate, sulfate, phosphate, or phosphonate. Examples of compounds falling within this definition are sodium 3-dodecylaminopropionate, sodium 3-dodecylaminopropane sulfonate. Other amphoterics such as betaines are also useful in the present composition. Examples of betaines useful herein include the high alkyl betaines such as coco betaine, coco dimethyl carboxymethyl betaine, lauryl dimethyl carboxy-methyl betaine, lauryl dimethyl alpha-carboxyethyl betaine, cetyl dimethyl carboxymethyl betaine, lauryl bis-(2-hydroxyethyl)carboxy methyl betaine, stearyl bis-(2-hydroxypropyl)carboxymethyl betaine, oleyl dimethyl gamma-carboxypropyl betaine, lauryl bis-(2-hydro-xypropyl)alpha-carboxyet-hyl betaine, etc. The sulfobetaines may be represented by coco dimethyl sulfopropyl betaine, stearyl dimethyl sulfopropyl betaine, amido betaines, amidosulfobetaines, and the like.
The nonionic surfactants useful in this invention can be broadly defined as compounds produced by the condensation of alkylene oxide groups (hydrophilic in nature) with an organic hydrophobic compound, which may be aliphatic or alkyl aromatic in nature. Non-limiting examples of preferred nonionic surfactants for use herein are those selected form the group consisting of glucose amides, alkyl polyglucosides, sucrose cocoate, sucrose laurate, alkanolamides, ethoxylated alcohols and mixtures thereof. In a preferred embodiment the nonionic surfactant is selected from the group consisting of glyceryl monohydroxystearate, isosteareth-2, trideceth-3, hydroxystearic acid, propylene glycol stearate, PEG-2 stearate, sorbitan monostearate, glyceryl laurate, laureth-2, cocamide monoethanolamine, lauramide monoethanolamine, decyl glucoside and mixtures thereof. The composition of the present invention may also comprise one or more sugar based surfactants selected from but not limited to condensation products of long chain alcohols with sugar or starch polymers (e.g. decyl polyglucoside and lauryl polyglucoside), amides (e.g. cocoamide diethanolamine and cocoamide monoethanolamine), alkylene oxide derived surfactants (e.g. ceteth-6, ceteareth6, steareth-6, PEG-12 stearate, and PEG-200 glyceryl tallowate), Maltooligosyl Glucoside/Hydrogenated Starch Hydrolysate and mixtures thereof. Preferred sugar based surfactants include Maltooligosyl Glucoside/Hydrogenated Starch Hydrolysate and Alkyl polyglucoside.
Surfactants are present in the concentration range of 5-20% w/w,
Water in the concentration range of 15-20 % w/w.
Solvent that may be used in the present invention include PG, sorbitol.
Solvents are present in the concentration range of 20-40 %w/w,
Sucrose is present in the concentration range of 1-10 %w/w,
Preferred oil is selected from propylene glycol, glycerin, sorbitol, paraffin oil and the preferred oil is glycerin
Organic oil is present in the concentration range of 0.5-3 % w/w,
Hydrotropes according to the present invention include but are not limited to cumene sulphonate, xylene sulphonates and combinations thereof
Hydrotopes are present in the concentration range of 0.5-5%w/w,
Preservatives according to the present invention include BHT, EDTA, phenoxy ethanol.
Preservatives are present in the concentration range of 0.1 to 0.5 %w/w
The colours can be selected from a group comprising C.I. Pigment Black 7 (C.I. 77266), C.I. Pigment Blue 15 (C.I. 74160), C.I. Pigment Blue 15:1 (C.I. 74160), C.I. Pigment Red 4 (C.I. 12085), C.I. Pigment Red 5 (C.I. 12490), C.I. Pigment Red 112 (C.I. 12370), C.I. Pigment Red 181 (C.I. 73360), C.I. Vat Red 1 , C.I. Pigment Green 7 (C.I. 74260), C.I. Pigment Violet 23 (C.I. 51319), C.I. Pigment Yellow 1 (C.I. 11680), C.I. Pigment Yellow 3 and the like
The fragrance may be selected from a group comprising musk oil, civet, castreum, ambergris, plant perfumes such as sandalwood oil, bergamot oil, lemon oil, lavender oil, sage oil, rosemary oil, peppermint oil, eucalyptus oil, menthol, camphor, verbena oil, citroneUa oil, cauout oil, salvia oil, clove oil, chamomiUe oil, sandalwood oil, costus oil, labdanum oil, broom extract, carrot seed extract, jasmine extract, minmosa extract, narcissus extract, oUbanum extract, rose extract and the like, and chemical substances such as acetophenonene, dimethyUnadane derivatives, naphthaline derivatives, aUyl caprate, α-amylcinnamic aldehyde, anethole, anisaldehyde, benzyl acetate, benzyl alcohol, benzyl propionate, borneol, cinnamyl acetate, cinnamyl alcohol, citral citronneUal, cumin aldehyde, cyclamen aldehyde, decanol, ethyl butyrate, ethyl caprate, ethyl cinnamate, ethyl vanillin, eugenol, geraniol, hexenol, α-hexylcinnamic aldehyde, hydroxycitrolneUal, indole, iso-amyl acetate, iso-amyl iso-valeratek iso-eugenol, nalol, linalyl acetate, p-methylacetophenone, methyl anthranilate, methyl dihydroasmonate, methyl eugenol, methyl-β-naphthol ketone, methylphenhlcarbinyl acetate, musk ketol, musk xylol, 2,5,6-nanodinol, γ-nanolactone, phenylacetoaldehydodimethyl acetate, β-phenylethyl alcohol, 3,3,5-trimethylcyclohexanol, γ- undecalactone, undecenal, vanillin and mixtures thereof
The emotive may be selected from a group comprising , Houttuynia cordata extract, Phellodendron bark extract, melilot extract, dead nettle extract, licorice extract, peony root extract, soapwort extract, luffa extract, cinchona extract, strawberry geranium extract, sophora root extract, nuphar extract, fennel extract, primrose extract, rose extract, rehmannia root extract, lemon extract, lithospermum root extract, aloe extract, calamus root extract, eucalyptus extract, field horsetail extract, sage extract, thyme extract, tea extract, seaweed extract, cucumber extract, clove extract, bramble extract, lemon balm extract, carrot extract, horse chestnut extract, peach extract, peach leaf extract, mulberry extract, knapweed extract, hamamelis extract, placenta extract, thymic extract, silk extract, and licorice extract, blue lotus extract, sea mineral extract, blueberry extract, black currant extract and the like
Color/fragrance/emotives in the concentration range of 0.1 to 1.5% w/w.
The tern “high amount of fatty acid” within the meaning of the present invention is defined as free form of fatty acid with higher chain length.
Another embodiment of the present invention provides a low pH transparent dual phase bathing bar comprising:
a) at least one inner phase; and
b) at least one outer phase
wherein said inner phase is transparent;
wherein said outer phase is opaque or vice versa.
wherein low pH transparent dual phase bathing bar comprises high amounts of Free Fatty acid.
The dual phase bar is prepared using an energy efficient process wherein the composite mass can be prepared at less than 100 deg C due unique combinations of soap, FFA, and solvent.
The optimal ratio of combination of inner to outer phase is 0.15: 0.85 to 0.85: 0.15 so as to maintain desired in-use and post use sensorial in terms of appearance likeability, foaminess, foam quality, post wash skin moisturization, post wash skin smoothness while maintaining low pH.
The amount of free fatty acids in the soap composition is >15% w/w.
The composition of inner transparent mass comprises the following components:
In-situ Soap according to the present invention includes alkali metal salts of fatty acids such as sodium palmitate and sodium oleate (i.e. anionic surfactants). Among the soaps that are used herein may be saponified glycerides from plant or animal sources such as sodium palmate, sodium palm kernelate, sodium cocoate, sodium tallowate, potassium tallowate, sodium lardate and other alkali metal salt of C8-C22 single chained and branched carboxylic acids
in-situ soap are in the concentration range of 20-50% w/w,
The synthetic surfactants used in the present invention may be selected from a group comprising anionic surfactants, amphoteric surfactants, nonionic surfactants, and any combinations thereof. As it is well known in the art that surfactant materials can also be an emulsifier, the term “surfactant” does not exclude materials which also have emulsification properties
The anionic surfactants that may be used in the present invention include but are not limited to alkyl sulfates, anionic acyl sarcosinates, anionic alkyl sarcosinates, methyl acyl taurates, N-acyl glutamates, acyl isethionates, alkyl ether sulfates, alkyl sulfosuccinates, alkyl phosphate esters, ethoxylated alkyl phosphate esters, trideceth sulfates, protein condensates, mixtures of ethoxylated alkyl sulfates and the like. Alkyl chains for these surfactants are C8-22, preferably C10-18 and, more preferably, C12-14 alkyls.
The amphoteric surfactants which can be used in the compositions of the present invention are those which can be broadly described as derivatives of aliphatic secondary and tertiary amines in which the aliphatic radical can be straight chain or branched and wherein one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic water solubilizing group, e.g., carboxy, sulfonate, sulfate, phosphate, or phosphonate. Examples of compounds falling within this definition are sodium 3-dodecylaminopropionate, sodium 3-dodecylaminopropane sulfonate. Other amphoterics such as betaines are also useful in the present composition. Examples of betaines useful herein include the high alkyl betaines such as coco betaine, coco dimethyl carboxymethyl betaine, lauryl dimethyl carboxy-methyl betaine, lauryl dimethyl alpha-carboxyethyl betaine, cetyl dimethyl carboxymethyl betaine, lauryl bis-(2-hydroxyethyl)carboxy methyl betaine, stearyl bis-(2-hydroxypropyl)carboxymethyl betaine, oleyl dimethyl gamma-carboxypropyl betaine, lauryl bis-(2-hydro-xypropyl)alpha-carboxyet-hyl betaine, etc. The sulfobetaines may be represented by coco dimethyl sulfopropyl betaine, stearyl dimethyl sulfopropyl betaine, amido betaines, amidosulfobetaines, and the like.
The nonionic surfactants useful in this invention can be broadly defined as compounds produced by the condensation of alkylene oxide groups (hydrophilic in nature) with an organic hydrophobic compound, which may be aliphatic or alkyl aromatic in nature. Non-limiting examples of preferred nonionic surfactants for use herein are those selected form the group consisting of glucose amides, alkyl polyglucosides, sucrose cocoate, sucrose laurate, alkanolamides, ethoxylated alcohols and mixtures thereof. In a preferred embodiment the nonionic surfactant is selected from the group consisting of glyceryl monohydroxystearate, isosteareth-2, trideceth-3, hydroxystearic acid, propylene glycol stearate, PEG-2 stearate, sorbitan monostearate, glyceryl laurate, laureth-2, cocamide monoethanolamine, lauramide monoethanolamine, decyl glucoside and mixtures thereof. The composition of the present invention may also comprise one or more sugar based surfactants selected from but not limited to condensation products of long chain alcohols with sugar or starch polymers (e.g. decyl polyglucoside and lauryl polyglucoside), amides (e.g. cocoamide diethanolamine and cocoamide monoethanolamine), alkylene oxide derived surfactants (e.g. ceteth-6, ceteareth6, steareth-6, PEG-12 stearate, and PEG-200 glyceryl tallowate), Maltooligosyl Glucoside/Hydrogenated Starch Hydrolysate and mixtures thereof. Preferred sugar based surfactants include Maltooligosyl Glucoside/Hydrogenated Starch Hydrolysate and Alkyl polyglucoside.
Surfactant are used in the concentration range of 5-20% w/w,
water is in the concentration range of 15-20 % w/w,
Solvent that may be used in the present invention include PG, sorbitol
solvents are in the concentration range of 20-40 %w/w,
Sucrose in the composition is chosen from sucrose and its derivatives.
Sucrose is in the concentration range of 1-10 %w/w,
Preferred organic oil is selected from propylene glycol, glycerin, sorbitol, paraffin oil and the preferred oil is glycerin
organic oil are in the concentration range of 0.5-3 % w/w,
Hydrotopes according to the present invention include but are not limited to cumene sulphonate, xylene sulphonates and combinations thereof
Hydrotopes are in the concentration range of 0.5-5%w/w,
Preservatives according to the present invention include BHT, EDTA, phenoxy ethanol.
Preservatives are in the concentration range of 0.1 to 0.5 %w/w and
The colors can be selected from a group comprising C.I. Pigment Black 7 (C.I. 77266), C.I. Pigment Blue 15 (C.I. 74160), C.I. Pigment Blue 15:1 (C.I. 74160), C.I. Pigment Red 4 (C.I. 12085), C.I. Pigment Red 5 (C.I. 12490), C.I. Pigment Red 112 (C.I. 12370), C.I. Pigment Red 181 (C.I. 73360), C.I. Vat Red 1 , C.I. Pigment Green 7 (C.I. 74260), C.I. Pigment Violet 23 (C.I. 51319), C.I. Pigment Yellow 1 (C.I. 11680), C.I. Pigment Yellow 3 and the like
The fragrance may be selected from a group comprising musk oil, civet, castreum, ambergris, plant perfumes such as sandalwood oil, bergamot oil, lemon oil, lavender oil, sage oil, rosemary oil, peppermint oil, eucalyptus oil, menthol, camphor, verbena oil, citroneUa oil, cauout oil, salvia oil, clove oil, chamomiUe oil, sandalwood oil, costus oil, labdanum oil, broom extract, carrot seed extract, jasmine extract, minmosa extract, narcissus extract, oUbanum extract, rose extract and the like, and chemical substances such as acetophenonene, dimethyUnadane derivatives, naphthaline derivatives, aUyl caprate, α-amylcinnamic aldehyde, anethole, anisaldehyde, benzyl acetate, benzyl alcohol, benzyl propionate, borneol, cinnamyl acetate, cinnamyl alcohol, citral citronneUal, cumin aldehyde, cyclamen aldehyde, decanol, ethyl butyrate, ethyl caprate, ethyl cinnamate, ethyl vanillin, eugenol, geraniol, hexenol, α-hexylcinnamic aldehyde, hydroxycitrolneUal, indole, iso-amyl acetate, iso-amyl iso-valeratek iso-eugenol, nalol, linalyl acetate, p-methylacetophenone, methyl anthranilate, methyl dihydroasmonate, methyl eugenol, methyl-β-naphthol ketone, methylphenhlcarbinyl acetate, musk ketol, musk xylol, 2,5,6-nanodinol, γ-nanolactone, phenylacetoaldehydodimethyl acetate, β-phenylethyl alcohol, 3,3,5-trimethylcyclohexanol, γ- undecalactone, undecenal, vanillin and mixtures thereof
The emotive may be selected from a group comprising , Houttuynia cordata extract, Phellodendron bark extract, melilot extract, dead nettle extract, licorice extract, peony root extract, soapwort extract, luffa extract, cinchona extract, strawberry geranium extract, sophora root extract, nuphar extract, fennel extract, primrose extract, rose extract, rehmannia root extract, lemon extract, lithospermum root extract, aloe extract, calamus root extract, eucalyptus extract, field horsetail extract, sage extract, thyme extract, tea extract, seaweed extract, cucumber extract, clove extract, bramble extract, lemon balm extract, carrot extract, horse chestnut extract, peach extract, peach leaf extract, mulberry extract, knapweed extract, hamamelis extract, placenta extract, thymic extract, silk extract, and licorice extract, blue lotus extract, sea mineral extract, blueberry extract, black currant extract and the like
Color/fragrance/emotives are in the concentration range of 0.1 to 1.5% w/w.
The composition of the outer opaque mass comprises of the following components:
The synthetic surfactants used in the present invention may be selected from a group comprising anionic surfactants, amphoteric surfactants, nonionic surfactants, and any combinations thereof. As it is well known in the art that surfactant materials can also be an emulsifier, the term “surfactant” does not exclude materials which also have emulsification properties
The anionic surfactants that may be used in the present invention include but are not limited to alkyl sulfates, anionic acyl sarcosinates, anionic alkyl sarcosinates, methyl acyl taurates, N-acyl glutamates, acyl isethionates, alkyl ether sulfates, alkyl sulfosuccinates, alkyl phosphate esters, ethoxylated alkyl phosphate esters, trideceth sulfates, protein condensates, mixtures of ethoxylated alkyl sulfates and the like. Alkyl chains for these surfactants are C8-22, preferably C10-18 and, more preferably, C12-14 alkyls.
The amphoteric surfactants which can be used in the compositions of the present invention are those which can be broadly described as derivatives of aliphatic secondary and tertiary amines in which the aliphatic radical can be straight chain or branched and wherein one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic water solubilizing group, e.g., carboxy, sulfonate, sulfate, phosphate, or phosphonate. Examples of compounds falling within this definition are sodium 3-dodecylaminopropionate, sodium 3-dodecylaminopropane sulfonate. Other amphoterics such as betaines are also useful in the present composition. Examples of betaines useful herein include the high alkyl betaines such as coco betaine, coco dimethyl carboxymethyl betaine, lauryl dimethyl carboxy-methyl betaine, lauryl dimethyl alpha-carboxyethyl betaine, cetyl dimethyl carboxymethyl betaine, lauryl bis-(2-hydroxyethyl)carboxy methyl betaine, stearyl bis-(2-hydroxypropyl)carboxymethyl betaine, oleyl dimethyl gamma-carboxypropyl betaine, lauryl bis-(2-hydro-xypropyl)alpha-carboxyet-hyl betaine, etc. The sulfobetaines may be represented by coco dimethyl sulfopropyl betaine, stearyl dimethyl sulfopropyl betaine, amido betaines, amidosulfobetaines, and the like.
The nonionic surfactants useful in this invention can be broadly defined as compounds produced by the condensation of alkylene oxide groups (hydrophilic in nature) with an organic hydrophobic compound, which may be aliphatic or alkyl aromatic in nature. Non-limiting examples of preferred nonionic surfactants for use herein are those selected form the group consisting of glucose amides, alkyl polyglucosides, sucrose cocoate, sucrose laurate, alkanolamides, ethoxylated alcohols and mixtures thereof. In a preferred embodiment the nonionic surfactant is selected from the group consisting of glyceryl monohydroxystearate, isosteareth-2, trideceth-3, hydroxystearic acid, propylene glycol stearate, PEG-2 stearate, sorbitan monostearate, glyceryl laurate, laureth-2, cocamide monoethanolamine, lauramide monoethanolamine, decyl glucoside and mixtures thereof. The composition of the present invention may also comprise one or more sugar based surfactants selected from but not limited to condensation products of long chain alcohols with sugar or starch polymers (e.g. decyl polyglucoside and lauryl polyglucoside), amides (e.g. cocoamide diethanolamine and cocoamide monoethanolamine), alkylene oxide derived surfactants (e.g. ceteth-6, ceteareth6, steareth-6, PEG-12 stearate, and PEG-200 glyceryl tallowate), Maltooligosyl Glucoside/Hydrogenated Starch Hydrolysate and mixtures thereof. Preferred sugar based surfactants include Maltooligosyl Glucoside/Hydrogenated Starch Hydrolysate and Alkyl polyglucoside.
surfactant in the concentration range of 30-70% w/w
The “free fatty acids” as used herein are selected from fatty acids with alkyl chain lengths of from C8 – C18. These may be selected from group of linear chained fatty acids, branched chain fatty acids, saturated and unsaturated fatty acids such as Caprylic, Capric, Lauric, Myristic, Palmitic, Stearic, Oleic, etc and mixtures thereof.
Free fatty acids is in the concentration range of 15-30 % w/w
Emulsifiers may be added to compositions of the present invention can be of the W/O type or O/W type. The addition of an emulsifier allows the incorporation of hydrophilic components or agents into the wax phase. Preferred are non-ionic emulsifiers which typically have good skin compatibility. Non-ionic emulsifiers of the present invention may be selected from group comprising addition products of 2 to 50 mole of ethylene oxide and/or 0 to 20 moles propylene oxide to linear fatty alcohols having 8 to 40 C-atoms, to fatty acids with 12 to 40 C-atoms and to alkylphenols with 8 to 15 C-atoms in the alkyl rest; C12-18-fatty acid mono- and -diesters of addition products of 1 to 50 mole of ethylene oxide and glycerine; glycerine mono- and -diesters and sorbitan mono- and -diesters of saturated and unsaturated fatty acids with 6 to 22 C-atoms and their ethylene oxide addition products; alkyl mono- and -oligoglycosides with 8 to 22 C-atoms in the alkyl rest and their ethoxylated analogs; addition products of 7 to 60 mole of ethylene oxide to castor oil and/or hardened castor oil; Polyol- and in particular polyglycerine esters, such as e.g. polyol poly-12-hydroxystearate, polyglycerine polyricinoleate, polyglycerine diisostearate or polyglycerine dimerate. Also applicable are mixtures of compounds of several of these substance classes; addition products of 2 to 15 mole of ethylene oxide to castor oil and/or hardened castor oil; partial esters derived from linear, branch chained, unsaturated or saturated C6-C22-fatty acids, ricinoleic acid as well as 12-hydroxystearic acid and glycerine, polyglycerine, pentaerythrite, dipentaerythrit, sugar alcohols (e.g. sorbitol), alkylglucosides (e.g. methylglucoside, butylglucoside, laurylglucoside), as well as polyglucosides (e.g. cellulose), or mixed esters such as e.g. glyceryl stearate/citrate and glyceryl stearate/lactate;Wool wax alcohols; Polysiloxane-polyalkyl-polyether-copolymers and derivatives thereof; Mixed esters from pentaerythrite, fatty acids, citric acid and fatty alcohols and/or mixed esters of fatty acids with 6 to 22 C-atoms with methylglucose and polyoles, respectively glycerine or polyglycerine; Polyalkylene glycols
emulsifiers are in the concentration range of 0.5-10 %w/w
According to the present invention polymers are starches such as corn starch, silicone polymers; water soluble polymers such as polyurethanes, polyacrylates, polyalkylene glycol with molecular weight between 200 and 20,000, preferably between 400 and 10,000 such as PEG 200, PEG 400, PEG600, PEG 1500, PEG 4000, PEG 6000, PEG 8000 and the like; anionic, zwitterionic, amphoteric and nonionic polymers that can be used are, for example, vinylacetate/crotonic acid-copolymers, vinylpyrrolidone/vinylacrylate-copolymers, vinylacetate/butylmaleate/ isobornylacrylate-copolymers, methylvinylether/maleic acid anhydride-copolymers and their esters, which are not cross-linked and with polyoles linked polyacrylacids which are cross-linked, acrylamidopropyltrimethylammonium chloride/ acrylate-copolymers, octylacrylamide/ methylmethacrylate/tert.butylaminoethylmethacrylate/2-hydroxypropylmethacrylate-copolymers, polyvinylpyrrolidone, vinylpyrrolidone/vinylacetate-copolymers, vinylpyrrolidone/ dimethylaminoethylmethacrylate/vinyl caprolactam-terpolymers as well as optionally derivatized cellulose ethers and silicones.
Polymers are in the concentration range of 1-10 %w/w
Organic structurant can be selected from the group comprising group comprising biopolymers such as starch, modified starch, guar gum, tamarind kernel polysaccharide or psyllium husk
Organic structurant are in the concentration range of 0.5-5 % w/w
Salts in accordance with the present invention is selected from group comprising sodium chloride, sodium sulfate, sodium lactate, sodium glycolate, sodium citrate, potassium chloride, potassium sulfate, magnesium chloride, calcium chloride and combinations thereof.
Salt are in the concentration range of 0.1-0.5%w/w
Water is in the concentration range of 0.1-1 %w/w.
Preferred oil is selected from propylene glycol, glycerin, sorbitol, paraffin oil and the preferred oil is glycerin
Oil is in the concentration range of 0.1-5%w/w
Soap according to the present invention includes alkali metal salts of fatty acids such as sodium palmitate and sodium oleate (i.e. anionic surfactants). Among the soaps that are used herein may be saponified glycerides from plant or animal sources such as sodium palmate, sodium palm kernelate, sodium cocoate, sodium tallowate, potassium tallowate, sodium lardate and other alkali metal salt of C8-C22 single chained and branched carboxylic acids
Soap are in the concentration range of 10-25%w/w
Preservatives according to the present invention include BHT, EDTA, phenoxy ethanol.
Preservatives are in the concentration range of 0.01 to 0.1 %w/w
pH regulator according to the present invention includes citric acid, lactic acid, oxalic acid, acetic acid etc.
pH regulator are in the concentration range of 0.2 to 2 %w/w and
The colours can be selected from a group comprising C.I. Pigment Black 7 (C.I. 77266), C.I. Pigment Blue 15 (C.I. 74160), C.I. Pigment Blue 15:1 (C.I. 74160), C.I. Pigment Red 4 (C.I. 12085), C.I. Pigment Red 5 (C.I. 12490), C.I. Pigment Red 112 (C.I. 12370), C.I. Pigment Red 181 (C.I. 73360), C.I. Vat Red 1 , C.I. Pigment Green 7 (C.I. 74260), C.I. Pigment Violet 23 (C.I. 51319), C.I. Pigment Yellow 1 (C.I. 11680), C.I. Pigment Yellow 3 and the like
The fragrance may be selected from a group comprising musk oil, civet, castreum, ambergris, plant perfumes such as sandalwood oil, bergamot oil, lemon oil, lavender oil, sage oil, rosemary oil, peppermint oil, eucalyptus oil, menthol, camphor, verbena oil, citroneUa oil, cauout oil, salvia oil, clove oil, chamomiUe oil, sandalwood oil, costus oil, labdanum oil, broom extract, carrot seed extract, jasmine extract, minmosa extract, narcissus extract, oUbanum extract, rose extract and the like, and chemical substances such as acetophenonene, dimethyUnadane derivatives, naphthaline derivatives, aUyl caprate, α-amylcinnamic aldehyde, anethole, anisaldehyde, benzyl acetate, benzyl alcohol, benzyl propionate, borneol, cinnamyl acetate, cinnamyl alcohol, citral citronneUal, cumin aldehyde, cyclamen aldehyde, decanol, ethyl butyrate, ethyl caprate, ethyl cinnamate, ethyl vanillin, eugenol, geraniol, hexenol, α-hexylcinnamic aldehyde, hydroxycitrolneUal, indole, iso-amyl acetate, iso-amyl iso-valeratek iso-eugenol, nalol, linalyl acetate, p-methylacetophenone, methyl anthranilate, methyl dihydroasmonate, methyl eugenol, methyl-β-naphthol ketone, methylphenhlcarbinyl acetate, musk ketol, musk xylol, 2,5,6-nanodinol, γ-nanolactone, phenylacetoaldehydodimethyl acetate, β-phenylethyl alcohol, 3,3,5-trimethylcyclohexanol, γ- undecalactone, undecenal, vanillin and mixtures thereof
The emotive may be selected from a group comprising , Houttuynia cordata extract, Phellodendron bark extract, melilot extract, dead nettle extract, licorice extract, peony root extract, soapwort extract, luffa extract, cinchona extract, strawberry geranium extract, sophora root extract, nuphar extract, fennel extract, primrose extract, rose extract, rehmannia root extract, lemon extract, lithospermum root extract, aloe extract, calamus root extract, eucalyptus extract, field horsetail extract, sage extract, thyme extract, tea extract, seaweed extract, cucumber extract, clove extract, bramble extract, lemon balm extract, carrot extract, horse chestnut extract, peach extract, peach leaf extract, mulberry extract, knapweed extract, hamamelis extract, placenta extract, thymic extract, silk extract, and licorice extract, blue lotus extract, sea mineral extract, blueberry extract, black currant extract and the like
Color/fragrance/emotives in the concentration range of 0.1 to 2% w/w.
The term “high amount of free fatty acid” within the meaning of the present invention is defined as free form of fatty acid with higher chain length.
As per yet another embodiment of the invention the opaque phase comprises a syndet bathing bar with high amount of free fatty acids wherein, the transparent mass is present in the form of a coating layer over the syndet bathing bar to form a low pH transparent dual-phase bathing bar.
As per still another embodiment of the invention the opaque phase comprises a syndet bathing bar wherein, the syndet bathing bar is present in the form of a coating layer over the transparent mass to form a dual-phase bathing bar.
The low pH dual phase bathing bar of the present invention is prepared using an energy efficient process. The inventors have found that the composite mass can be prepared at a temperature below 100°C because of the unique combinations of soap, FFA, and solvent.
The low pH dual phase transparent bathing bar has a unique combination of
a. C16 to C18 fatty acids in free form from 15 to 20 % w/w.
b. pH regulators form 1 to 5 % w/w.
c. high surfactant to solvent ratio (wherein the surfactants are present 1.5 to 4 times more than solvents)
The present composition provide the desirable pH and enhanced in-use and post use sensorial in terms of appearance likeability, good performance, foam quality, superior in use lather, post wash skin moisturization and post wash skin smoothness.
The combination allows soap to melt at a much lower temperature (less than 100 0C). During processing high amount of solvent to surfactant ratio helps to maintain desired liquidity and good emulsification in order to make a melted uniform mass at lower temperature.
The dual phase bar is prepared using an energy efficient process wherein the composite mass can be prepared at less than 100 deg C due unique combinations of soap, FFA, and solvent.
Further the present inventors have found that the suitable working range for the combination of inner phase and the outer phase as per the instant invention desirous to obtain high amount of FFA and low pH in the dual phase bathing bar is from 5 to 95 % and vise versa. More preferably the range of combination of inner phase and the outer phase is from 15 to 85% and vice versa. It has further been found that the unique combination of the first portion which is a transparent bar and second portion which is syndet bar provides bar aesthetics in opaque form i.e. 2 quarters transparency.
The term 2 quarter transparency refers to 50% transparent and 50% opaque soap.
Conventional ingredients that may be added to the cleansing bar formulation of the present invention may be selected from the group comprising plasticizers, polymers, surfactants, soap, binders, emollient, preservatives, color, fragrance, emotives, pH Regulator, water, secondary emulsifier, active ingredients, pigments, electrolytes (salts), humectants, structurants and combinations thereof.

The plasticizer in accordance with the present invention is selected from group comprising triglycerides; fatty acids, their esters and their alkanolamies, such as glyceryl monostearate, stearic acid, palmitic acid, lauric acid, myristic and combinations thereof. Typically plasticizers are present in amounts 4 to 12 % by weight, preferably 7 to 12 % by weight of the total formulation.

The composition for the transparent soap and syndet bar comprises of soap, surfactants, aqua, solvents, sucrose, organic oil, hydrotopes, preservative and color / fragrance / emotive.
The “free fatty acids” as used herein are selected from fatty acids with alkyl chain lengths of from C8 – C18. These may be selected from group of linear chained fatty acids, branched chain fatty acids, saturated and unsaturated fatty acids such as Caprylic, Capric, Lauric, Myristic, Palmitic, Stearic, Oleic, etc and mixtures thereof. The free fatty acids that are used in the soap bar compositions of the present invention may be present in an amount from approximately 15% to approximately 30% by weight.
Part A is transparent mass and does not contain FFA, FFA is present in the part B i.e. the opaque part.
The composition of the present invention may comprise one or more surfactants selected from natural, natural-derived, or synthetic or a combination thereof. Preferably, the soap composition of the present invention may comprise alkali metal salts of fatty acids such as sodium palmitate and sodium oleate (i.e. anionic surfactants). Among the soaps that are used herein may be saponified glycerides such as sodium palmate, sodium palm kernelate and sodium cocoate. The soaps that are used in the soap bar compositions of the present invention may be present in an amount from approximately 50% to approximately 80%, preferably from approximately 55% to approximately 70% by weight.
The synthetic surfactants used in the present invention may be selected from a group comprising anionic surfactants, amphoteric surfactants, nonionic surfactants, and any combinations thereof.
As it is well known in the art that surfactant materials can also be an emulsifier, the term “surfactant” does not exclude materials which also have emulsification properties. The synthetic surfactants that are used in the soap bar compositions of the present invention may be present in an amount from approximately from 40 to 60wt%.
The anionic surfactants that may be used in the present invention include but are not limited to alkyl sulfates, anionic acyl sarcosinates, anionic alkyl sarcosinates, methyl acyl taurates, N-acyl glutamates, acyl isethionates, alkyl ether sulfates, alkyl sulfosuccinates, alkyl phosphate esters, ethoxylated alkyl phosphate esters, trideceth sulfates, protein condensates, mixtures of ethoxylated alkyl sulfates and the like. Alkyl chains for these surfactants are C8-22, preferably C10-18 and, more preferably, C12-14 alkyls.
The amphoteric surfactants which can be used in the compositions of the present invention are those which can be broadly described as derivatives of aliphatic secondary and tertiary amines in which the aliphatic radical can be straight chain or branched and wherein one of the aliphatic substituents contains from about 8 to about 18 carbon atoms and one contains an anionic water solubilizing group, e.g., carboxy, sulfonate, sulfate, phosphate, or phosphonate. Examples of compounds falling within this definition are sodium 3-dodecylaminopropionate, sodium 3-dodecylaminopropane sulfonate. Other amphoterics such as betaines are also useful in the present composition. Examples of betaines useful herein include the high alkyl betaines such as coco betaine, coco dimethyl carboxymethyl betaine, lauryl dimethyl carboxy-methyl betaine, lauryl dimethyl alpha-carboxyethyl betaine, cetyl dimethyl carboxymethyl betaine, lauryl bis-(2-hydroxyethyl)carboxy methyl betaine, stearyl bis-(2-hydroxypropyl)carboxymethyl betaine, oleyl dimethyl gamma-carboxypropyl betaine, lauryl bis-(2-hydro-xypropyl)alpha-carboxyet-hyl betaine, etc. The sulfobetaines may be represented by coco dimethyl sulfopropyl betaine, stearyl dimethyl sulfopropyl betaine, amido betaines, amidosulfobetaines, and the like.
The nonionic surfactants useful in this invention can be broadly defined as compounds produced by the condensation of alkylene oxide groups (hydrophilic in nature) with an organic hydrophobic compound, which may be aliphatic or alkyl aromatic in nature. Non-limiting examples of preferred nonionic surfactants for use herein are those selected form the group consisting of glucose amides, alkyl polyglucosides, sucrose cocoate, sucrose laurate, alkanolamides, ethoxylated alcohols and mixtures thereof. In a preferred embodiment the nonionic surfactant is selected from the group consisting of glyceryl monohydroxystearate, isosteareth-2, trideceth-3, hydroxystearic acid, propylene glycol stearate, PEG-2 stearate, sorbitan monostearate, glyceryl laurate, laureth-2, cocamide monoethanolamine, lauramide monoethanolamine, decyl glucoside and mixtures thereof. The composition of the present invention may also comprise one or more sugar based surfactants selected from but not limited to condensation products of long chain alcohols with sugar or starch polymers (e.g. decyl polyglucoside and lauryl polyglucoside), amides (e.g. cocoamide diethanolamine and cocoamide monoethanolamine), alkylene oxide derived surfactants (e.g. ceteth-6, ceteareth6, steareth-6, PEG-12 stearate, and PEG-200 glyceryl tallowate), Maltooligosyl Glucoside/Hydrogenated Starch Hydrolysate and mixtures thereof. Preferred sugar based surfactants include Maltooligosyl Glucoside/Hydrogenated Starch Hydrolysate and Alkyl polyglucoside. The sugar based surfactants of the present invention may be present in an amount from approximately 0.1 % to 5% by weight, preferably from about 0.5 – 3% by wt.
According to the present invention polymers are silicone polymers; water soluble polymers such as polyurethanes, polyacrylates, polyalkylene glycol with molecular weight between 200 and 20,000, preferably between 400 and 10,000 such as PEG 200, PEG 400, PEG600, PEG 1500, PEG 4000, PEG 6000, PEG 8000 and the like; anionic, zwitterionic, amphoteric and nonionic polymers that can be used are, for example, vinylacetate/crotonic acid-copolymers, vinylpyrrolidone/vinylacrylate-copolymers, vinylacetate/butylmaleate/ isobornylacrylate-copolymers, methylvinylether/maleic acid anhydride-copolymers and their esters, which are not cross-linked and with polyoles linked polyacrylacids which are cross-linked, acrylamidopropyltrimethylammonium chloride/ acrylate-copolymers, octylacrylamide/ methylmethacrylate/tert.butylaminoethylmethacrylate/2-hydroxypropylmethacrylate-copolymers, polyvinylpyrrolidone, vinylpyrrolidone/vinylacetate-copolymers, vinylpyrrolidone/ dimethylaminoethylmethacrylate/vinyl caprolactam-terpolymers as well as optionally derivatized cellulose ethers and silicones. Typically polymers are present in amounts 1 to 8 % by weight of the total formulation.
Binders according to the present invention includes high molecular weight PEGs like PEG6000, PEG 8000, poly acrylates, high molecular weight poly-ox, silicates, fatty alcohols, lanolin, sugars, tallow alcohol ethoxylates, and mixtures thereof. Other plastic binders are identified in the published literature, such as J. Amer. Oil Chem. Soc. 1982, 59; 442.Binders can be present in amounts 0.2 to 4 % by weight in the final product.
Emollients are substance which soften or improve the elasticity, appearance, and youthfulness of the skin (stratum corneum) by increasing its water content, and keeps it soft by retarding the decrease of its water content. Emollients that may be used in the present invention include but are not limited to silicone oils and modifications thereof such as linear and cyclic polydimethylsiloxanes; polyols such as glycerol, sorbitol; amino, alkyl, alkylaryl, and aryl silicone oils; fats and oils including natural fats and oils such as jojoba, soybean, sunflower, rice bran, avocado, almond, olive, sesame, persic, castor, coconut, mink oils; cacao fat; beef tallow, lard; hardened oils obtained by hydrogenating the aforementioned oils; and synthetic mono, di and triglycerides such as myristic acid glyceride and 2-ethylhexanoic acid glyceride; waxes such as carnauba, spermaceti, beeswax, lanolin, and derivatives thereof; hydrophobic plant extracts; hydrocarbons such as liquid paraffin, petrolatum, microcrystalline wax, ceresin, squalene, pristan and mineral oil; higher fatty acids such as lauric, myristic, palmitic, stearic, behenic, oleic, linoleic, linolenic, lanolic, isostearic, arachidonic and poly unsaturated fatty acids (PUFA); higher alcohols such as lauryl, cetyl, stearyl, oleyl, behenyl, cholesterol and 2-hexydecanol alcohol; esters such as cetyl octanoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, glycerol monostearate, glycerol distearate, glycerol tristearate, alkyl lactate, alkyl citrate and alkyl tartrate; essential oils and extracts thereof such as mentha, jasmine, camphor, white cedar, bitter orange peel, ryu, turpentine, cinnamon, bergamot, citrus unshiu, calamus, pine, lavender, bay, clove, hiba, eucalyptus, lemon, starflower, thyme, peppermint, rose, sage, sesame, ginger, basil, juniper, lemon grass, rosemary, rosewood, avocado, grape, grapeseed, myrrh, cucumber, watercress, calendula, elder flower, geranium, linden blossom, amaranth, seaweed, ginko, ginseng, carrot, guarana, tea tree, jojoba, comfrey, oatmeal, cocoa, neroli, vanilla, green tea, penny royal, aloe vera, menthol, cineole, eugenol, citral, citronelle, borneol, linalool, geraniol, evening primrose, camphor, thymol, spirantol, penene, limonene and terpenoid oils; and mixtures of any of the foregoing components, and the like. Advantageously emollients may be used from about 0.5 to about 3 % by weight in the final product.
Preservatives according to the present invention include BHT, EDTA, phenoxy ethanol. Preservatives can be present in amounts 0.01 to 0.1 % by weight in the final product.
pH regulator according to the present invention includes citric acid, lactic acid, oxalic acid, acetic acid etc. pH regulator can be present in amounts 0.2 to 2 % by weight in the final product.
Further the composition of the present invention can comprise 0.1 to 6 % by weight of water, 0.5 to 1.5 % by weight of fragrance, 0.005 to 0.5 % by weight of emotive.
The inventors have found that the properties of dual phase bathing bar of the present invention is able to include high amount of FFA, has a low pH, has improved sensorial, post wash deposition and moisture retention

Another embodiment of the present invention provides a process for the preparation of the dual phase bathing bar with high amount of FFA.
Transparent soap bars and opaque soap bars comprising high amounts of FFAs and as may form the inner or outer phase of the present invention may be made by conventional transparent and or opaque soap making processes well known in the art.
Non limiting process steps of preparation of transparent soap bars and opaque soap bar of the present invention are stated as follows:
Process of preparing conventional transparent soap:
In the first step for the preparation of the conventional transparent soap, fatty acid is melted at a temperature. The temperature ranges from 70-75 °C.
Once the fatty acid is melted, the solvents and the hydrotopes are added followed by the organic oils and preservatives.
For the in-situ generation of the soap, alkali is added to the mixture prepared above. The process of homogenization is carried out after the addition of surfactant.
To the homogenized mixture sucrose is added and mixed for 1 to 20 minutes, preferably 5 minutes.
The addition of color and fragrance to the soap formed is optional.
Process of preparing conventional Opaque soap:
Step 1: In the first step all the fatty acids, polymers, oil and emulsifiers are mixed in a mixer. The temperature at which the mixing of the above stated ingredients is carried out ranges from 65-75°C.

Step 2: The above step of melting and mixing is carried out for about 20-30 minutes. Following this soap is added at a high temperature. The temperature ranges from 85-90°C.
Step 3: The above step of melting is followed by the addition if pH regulators and surfactants. The temperature maintained in this step ranges from 90-95°C.
Step 4: Additives like color, salt, emotive are added once the soap and the surfactants are mixed completely.
Step 5: The step of high speed mixing of the organic structurants, emulsifiers follows. Thereafter the step of homogenization is carried out.
Step 6: The final mixture is maintained at a temperature of 85-90°C so that the mixture maintains a pouring consistency.
The process for making the dual phase bathing bar of the present invention wherein the transparent soap covers the opaque soap bar comprises:
Step 1: The transparent and the opaque soap of the present invention are prepared by the conventional methods of preparing the same as disclosed above.
Step 2: The opaque soap is then poured in a mould to obtain a desired shape. The opaque soap is maintained in at a temperature ranging from 75-80°C.
Step 3: The opaque soap mass is now allowed to cool at a temperature ranging from 40-60°C. The pre casted transparent soap mass is then poured over it.
Step 4: The remaining transparent soap is then poured over the opaque soap mass such that the transparent soap now completely covers the opaque soap.
Step 5: The temperature at which the process is carried out ranges from 75-80°C. This temperature is maintained such that the transparent soap has a pouring consistency.
Step 6: The soap mass is then allowed to solidify and a dual phase bathing bar is obtained.
The process for making the dual phase bathing bar of the present invention wherein the opaque soap covers the transparent soap bar comprises:
Step 1: The transparent and the opaque soap of the present invention are prepared by the conventional methods of preparing the same as disclosed above.
Step 2: The transparent soap is then poured in a mould to obtain a desired shape. The transparent soap is maintained in at a temperature ranging from 75-80°C.
Step 3: The transparent soap mass is now allowed to cool at a temperature ranging from 40-60°C. The pre casted opaque soap mass is then poured over it.
Step 4: The remaining opaque soap is then poured over the transparent soap mass such that the opaque soap now completely covers the transparent soap.
Step 5: The temperature at which the process is carried out ranges from 75-80°C. This temperature is maintained such that the transparent soap has a pouring consistency.
Step 6: The soap mass is then allowed to solidify and a dual phase bathing bar is obtained.
The process of preparation of the transparent and opaque soap bars are the same as that of the conventional methods. The inventive merit of the dual phase bathing bar of the present invention may lie on the process of coating the opaque soap bar with a transparent soap bar.
The desired properties are achieved through unique formulation of opaque and transparent soap which comprises high free fatty acid and the proportionate mixture of the soap i.e. opaque to transparent mass ratio from 0.15: 0.85 to 0.85: 0.15. High stability is achieved through the unique combination format and also processing condition of preparing dual phase soap bar.
The temperature range during the time of cooling has to be maintained between 40 to 60 0C in order to achieve good binding of the two different formulations.
Step 3 describes that transparent soap mass is now allowed to cool at a temperature ranging from 50-60°C. The pre casted opaque soap mass is then poured over it. This unique step prevents either the opaque or transparent mass to diffuse to another layer. At the same time , at this particular temperature binding of the two masses are very good and the final soap mass maintains the desired aesthetic properties.
The low pH dual phase transparent bathing bar has a unique combination of
a. C16 to C18 fatty acids in free form from 15 to 20 % w/w.
b. pH regulators form 1 to 5 % w/w.
d. high surfactant to solvent ratio. (wherein the surfactants are present 1.5 to 4 times more than solvents)
The composition of the present invention is now illustrated by way of non limiting examples. Experiments have been conducted to illustrate the transparent floating bathing bar with high amount of FFA. However any transparent soap bar may be interchangeably used for making the dual phase soap composition of the present invention.
Example 1: Working example of composition for dual phase bathing bar with high amount of FFA wherein the transparent soap covers the opaque soap
Table 1
Ingredients %
Part-A transparent mass
In-situ soap 20-50
Surfactants 5-20
Aqua 15-20
Solvents 20-40
Sucrose 1-10
Organic oil 0.5-3
Hydrotopes 0.5-5
Preservative 0.1-0.5
Color / Fragrance / Emotive 0.1-1.5
Part-B opaque mass
Surfactant 30-70
Free Fatty Acid (C16-C18) 15-30
Emulsifier 0.5-10
Polymer 1-10
Organic structurant 0.5-5
Salt 0.1-0.5
Aqua 0.1-1
Oil 0.1-5
Soap 10-25
Preservatives 0.01-0.1
pH regulator 0.2-2
Color / Fragrance / Emotive 0.1-2

Specific example Table 2
Ingredients %
Part-A transparent mass
In-situ soap 39
Surfactants 6
Aqua 16
Solvents 33
Sucrose 3
Organic oil 1
Hydrotopes 0.5
Preservative 0.5
Color / Fragrance / Emotive 1
Part-B opaque mass
Surfactant 58
Free Fatty Acid (C16-C18) 15
Emulsifier 1
Polymer 8
Organic structurant 2
Salt 0.5
Aqua 1
Oil 1
Soap 13
Preservatives 0.1
pH regulator 0.5
Color / Fragrance / Emotive 1

The Best working ratio of the transparent soap: opaque soap is 0.15: 0.85
The Best working ratio of the opaque soap: transparent soap is 0.85: 0.15

Example 2: A typical example of composition for dual phase bathing bar with high amount of FFA wherein the opaque soap covers the transparent soap

Table 3
Ingredients %
Part-A transparent mass
In-situ soap 10-50
Surfactants 2-10
Aqua 5-20
Solvents 10-25
Sucrose 1-5
Organic oil 0.2-5
Hydrotopes 0.2-1
Preservative 0.05-0.1
Color / Fragrance / Emotive 0.1-1
Part-B opaque mass
Surfactant 40-60
Free Fatty Acid (C16-C18) 15-30
Emulsifier 0.5-5
Polymer 1-8
Organic structurant 0.5-5
Salt 0.05-1
Aqua 0.1-1
Oil 0.1-3
Soap 5-15
Preservatives 0.01-0.05
pH regulator 0.2-1
Color / Fragrance / Emotive 0.1-1

Specific Example table 4

Ingredients %
Part-A transparent mass
In-situ soap 44
Surfactants 7
Aqua 18
Solvents 22
Sucrose 4
Organic oil 4
Hydrotopes 1
Preservative 0.1
Color / Fragrance / Emotive 1
Part-B opaque mass
Surfactant 56
Free Fatty Acid (C16-C18) 20
Emulsifier 5
Polymer 5
Organic structurant 4
Salt 0.5
Aqua 1
Oil 2
Soap 12
Preservatives 0.05
pH regulator 0.5
Color / Fragrance / Emotive 1

Example 3: Process for the preparation of the dual phase bathing bar with high amount of FFA
For Making Part-A:
Fatty acid is melted at a temperature ranges from 70-75 °C.
Once the fatty acid is melted, the solvents and the hydrotopes are added followed by the organic oils and preservatives.
For the in-situ generation of the soap, alkali is added to the mixture prepared above. The process of homogenization is carried out after the addition of surfactant.
To the homogenized mixture sucrose is added and mixed for preferably 15 minutes.
The addition of color and fragrance to the soap formed is optional.
For Making Part-B:

In the first step all the fatty acids, polymers, oil and emulsifiers are mixed in a mixer. The temperature at which the mixing of the above stated ingredients is carried out ranges from 65-75°C.
The above step of melting and mixing is carried out for about 20-30 minutes. Following this soap is added at a high temperature. The temperature ranges from 85-90°C.

The above step of melting is followed by the addition if pH regulators and surfactants. The temperature maintained in this step ranges from 90-95°C.

Additives like color, salt, emotive are added once the soap and the surfactants are mixed completely.
The step of high speed mixing of the organic structurants, emulsifiers follows. Thereafter the step of homogenization is carried out.

The final mixture is maintained at a temperature of 85-90°C so that the mixture maintains a pouring consistency.
Process of making dual phase soap bar

The Part A and Part B soap of the present invention are prepared by the conventional methods of preparing the same as disclosed above.
The Part B is then poured in a mould to obtain a desired shape. The part B soap is maintained in at a temperature ranging from 75-80°C.
The part B soap mass is now allowed to cool at a temperature ranging from 40-60°C. The pre casted part A soap mass is then poured over it.
The remaining part A soap is then poured over the part B soap mass such that the part A soap now completely covers the part B soap.
The temperature at which the process is carried out ranges from 75-80°C. This temperature is maintained such that the transparent soap has a pouring consistency.
The soap mass is then allowed to solidify and a dual phase bathing bar is obtained.
Example 4: working of present invention in ratio range 0.15: 0.85 to 0.85: 0.15 and non working beyond the same.
Table 5

Ratio of combination of opaque and transparent soap Observation
Lather profile at 30 FH Moisturization feel post wash Aesthetics score for dual phase pH
10:90 460±10 Poor (4) Not optimum >9.5
15: 85 450±10 Optimum (6) Optimum 9.3
50:50 430±10 Good(7.5) Optimum 8.8
85: 15 400±10 Good(8.0) Optimum 8.5
90:10 <350 Good(8.0) Not optimum 8.4

Example 5: Improved sensorial: post wash deposition
Sensory Results: table 6
Average Sensory Results
Parameters Dual Soap Normal Transparent Soap Normal opaque soap
Appearance Likability 8.8 7.4 7.0
Foam Creaminess 7.2 6.2 5.0
Foam quantity 7.0 6.6 6.0
Moisturization Feel post wash 7.0 6.6 4.0
Skin Smoothness post wash 6.6 6.6 6.0

Score scale: On a scale of 1 to 10 where 1 is very low 5 is medium and 10 is very high, the dual phase soap provided enhanced sensorial and evident from the table and graph .
Example 6: lower pH values
Table 7

Sample pH @ 25 0C
Dual Soap 9.34 - 9.46
Normal Transparent soap 10.10 -10.32
Normal opaque soap 10.0-10.5