Description:TECHNICAL FIELD:
The present disclosure relates to a skin care composition. More specifically, the present disclosure relates to a synergistic strip-less depilatory wax composition comprising a) an olibanum resinoid, an extract of processed resinous gum exudates, which may be a material after value recovery (purified de-oiled spent). b) rosin ester gum and/or compounds of rosin, which is well known as an ingredient in liposoluble depilatory waxes, in selected ratios, c) thermoplastic elastomers and d) waxes, oils, and butters in a cosmetically acceptable base that surprisingly provide an excellent product for strip-less hair removal. Also, the strip-less depilatory wax can be peeled off of skin without the help of woven fabric, paper, or any other substrate without breaking. Further, the present wax composition, which is easy to apply, has excellent hair sticking and tacking properties and does not require woven cloth, fabric, paper, or any substrate to peel off the applied wax from the skin for removing hair.

BACKGROUND:
Information provided in the "Background" section is included for setting the context and for your understanding of the present invention. It is not an admission that any of the data included in the present inventive application is previous knowledge, is currently being claimed, or is part of any publication directly or implicitly referred to herein.

Removal of unwanted hair from the human body is becoming a common practice in recent years, more particularly in the under arm, other sensitive areas and face. Numerous methods have been developed and/or in practice over the years to achieve smooth and hair-free skin. Laser technology, electrolysis, chemical and physical methods are few of the examples. Shaving and chemical methods are usually used for hair removal in sensitive areas like bikini and under arm. Hair removal using Laser technology and electrolysis is usually carried out by medical professionals.

Wax is usually used for removing hair physically and “Waxing” is a process by which a film of wax with a firm yet flexible backing material is used to pull unwanted hair out from the root bulb of the hair. Waxing has gained significant popularity due to its effectiveness and longer-lasting results. Liposoluble waxes, hydrosoluble or sugar waxes and strip-less waxes are different kind of waxes suitable for waxing available in the market. In the physical hair removal method, traditionally, strip waxing involved applying wax to the skin and removing it using fabric, paper strips or other substrates. Usually, the wax is heated above its melting point, a thin layer is applied on the skin where the hair needs to be removed, a woven cloth is applied on the wax, and when the wax solidifies, the strip is pulled out in one swift motion. Similarly wax coated woven cloths are also available in the market.

Strip-less depilatory wax, also known as hard wax or hot wax, is a modern advancement in the field of hair removal. Strip-less depilatory wax has revolutionized the hair removal industry, providing a more convenient and efficient alternative for hair removal. In case of strip-less wax, usually the wax is heated above its melting point, a thick layer of melted wax is applied on the skin where the hair needs to be removed, allow the applied wax to cool down. Gripping the edge of the applied wax, it must be pulled out in a swift motion to remove the hair. Strip-less wax is a new trend in the waxing industry especially for sensitive areas like bikini and under arm hair removal, where the applied wax itself will act as a strip and no additional woven cloth or other substrate is required for peeling to remove the hair.

One of the innate problems with waxing is that it can cause skin irritation due to the process or due to the chemicals including impurities present in the raw materials. The waxing process itself can cause problems like folliculitis or prostaglandin formation when epidermal layers of skin are removed or peeled off along with hair while stripping the wax strip. This can cause inflammatory reaction and leads to redness, itching or small blisters in the waxed area. If the hair follicle is injured or damaged during the hair removal process, it can lead to bacterial infection and to folliculitis. The appearance of folliculitis is similar to a rash, which looks like pimples and is slightly bumpy, however recedes normally on its own in a few days. One of the most prevalent “wax” materials is rosin or esters of rosin. In sensitive individuals, rosins may cause acute allergic contact dermatitis. Even though rosin is not directly used in the formulation, any impurities of rosin/colophony present in the formulation may induce severe skin irritation. Hence, any “wax” based product containing nil or reduced rosin / rosin esters is highly desirable.

Strip-less wax adheres firmly to the hair, allowing for effective removal from the root. This results in longer lasting smoothness and reduces the need for frequent waxing sessions. Strip-less waxing is generally considered as less painful than traditional strip wax. Since it adheres mainly to hair and less to skin, it minimizes the discomfort and skin irritation. Strip-less wax can easily be used on various part of the body including sensitive areas like face, under arm, bikini line, upper lips etc. It is very convenient to use in small patches.

FR2940070A1 disclosed about a plant derived vegetable fatty body epilatory composition comprising rice bran oil or rice seed, rice wax, rice butter along with a thermoplastic elastomer. Even though the disclosure is of vegetable-based composition, it comprises of majorly rosin and rosin derivatives. Pure rosin and or rosin derivatives in the composition gives the sticky power. The thermoplastic elastomers act as plasticizers and binders for controlling the elasticity of the depilatory wax at room temperature. Pure rosin also known as the colophony is a known skin irritant and will have problem in using the product especially in the sensitive areas.

EP0299816A1 & US 5154919A, CA1339084C (C.D. Gerets) disclosed about a composition based on colophony and elastomer or thermoplastic compound and at least one fabric softener chosen from the group consisting of oils, fats and waxes. Here 40 to 80% of the composition is rosin/ colophony and rosin compounds. Rosin / Colophony is a known skin irritant and the usage of this composition in the sensitive area can cause severe skin irritation problems.

FR2751872A1 discloses about a hair removing composition consisting of elastomer, natural rosin (Colophony), modified rosin compounds and or synthetic resin as tackifier and softeners such as fats, oils and waxes. The elastomeric component consists of a mixture of at least two thermoplastic elastomers. Colophony and synthetic resins are known to have severe skin irritancy.

WO2018007760A1 discloses about a depilatory hair pulling composition especially for human use and in particular, but not limited to for professional use, without band comprising a synthetic tackifying agent,

CN108379120A discloses a strip-less wax and a preparation method. The disclosed wax consists rosin, hydrogenated rosin and glyceryl rosinate along with EVA elastomer and paraffin as the adhesive. Here again the usage of rosin in the composition can lead to severe skin irritation specifically when using in the sensitive areas. Even though the disclosure describes about the composition and method of preparation, there is no details of any performance evaluation is incorporated.

EP3009168A1 is a disclosure of microwavable strip-less wax consists of adhesives, plasticizers, glycerin and emulsifiers. Adhesive resins used in this invention are selected from the group comprising esters of hydrogenated rosin and glycerin, glyceryl rosinate. Hydrogenated styrene- methyl styrene- indene copolymer, olefin styrene copolymers, hydrogenated polycyclopentadienes. Even though the composition and preparation methods are explained, the advantages of the disclosure over existing products or any evaluation methods are not explained.

EP3124014A1 disclosed about a wax composition having hydrocarbon resin or colophony, and incorporates hydrophilic cosmetic actives that improve the cosmetic properties of the composition. The disclosure is explaining about only one example composition and not discussing about the performance of the composition anywhere.

In the design of an optimally performing strip-less depilatory wax composition for hair removal, there is a need for a depilatory wax which has the following advantages (1) No need for a separate strip for functioning, as the composition itself forms a strip; (2) Easy removal of strip formed by the composition in a single attempt without breaking; (3) Complete removal of hair in a single application; (4) No (or minimal) residue for clean-up; (5) Least adhesion to skin. So, it is very clear from the prior art that there is a need for a strip-less wax composition suitable to use even in the sensitive areas like bikini, under arm, face etc., having ease of application, ease of peeling without breaking the strip and also causes less irritation.

OBJECTIVES:
An object of the present disclosure is to provide a novel synergistic liposoluble strip-less depilatory wax composition that has a technical advancement over known strip-less waxes which consist of thermoplastic elastomer, and rosin ester and / or compounds of rosin.

In an object of the present disclosure is to provide a novel synergistic liposoluble strip-less depilatory wax composition which consists of an extract of processed resinous gum exudates(Olibanum resinoid), which is a material after value recovery (purified de-oiled spent), rosin ester and / or compounds of rosin, a thermoplastic elastomer, as well as waxes, oils, and butters, in a cosmetically acceptable base that may include, but not limited to plasticizers, opacifiers, emollients, skin beneficial agents including anti-allergenic agents, antioxidants, preservatives, fragrance, and colours / pigments.

Another object of the present disclosure is to provide a novel synergistic liposoluble strip-less depilatory wax composition for effective removal of unwanted hair from skin particularly from areas with delicate / sensitive skin with less or no irritation.

Yet another object of the present disclosure is to provide a novel synergistic liposoluble strip-less depilatory wax composition which does not require woven cloth / fabric, paper, sheets or any other external substrates to peel off the wax from skin to remove hair.

Further object of the present disclosure is to provide a novel synergistic liposoluble strip-less depilatory wax composition which would be easy to apply and would also be easy to strip off in quick motion without breaking the formed film.

Furthermore, object of the present disclosure is to provide wax composition which would be easy to manufacture and store stable.

SUMMARY:
The present disclosure relates to a novel synergistic liposoluble strip-less depilatory wax composition, which demonstrates excellent hair removal property along with less or no skin irritation. In addition, depilatory wax composition is having skin friendliness and ease of application to the skin.

An aspect of the present disclosure relates to a liposoluble strip-less wax composition comprising:
a. 0.5% to 10 wt% of extract of processed resinous gum exudates;
b. 60% to 72 wt% of esters of gum rosin and or compounds of rosin;
c. 5% to 20 wt% of thermoplastic elastomers; and
d. 5% to 40 wt% of waxes, oils, and butters in a cosmetically acceptable base.

Various features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments.

DETAILED DESCRIPTION:
It is to be understood that the present disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the drawings. The present disclosure is capable of other embodiments, of being practiced, or of being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.

Definitions
• “Thermoplastic Elastomers” are understood to a polymer blend or compound which, above its melting temperature, exhibits a thermoplastic character that enables it to be shaped into a fabricated and which, within its design temperature range, possesses elastomeric behavior without cross-linking during fabrication.
• “Rosins” (also referred to as colophony) are understood as resins obtained from conifer plants and also includes such rosin derivatives that are esterified, modified with a polyhydroxy alcohol such as glycerol or pentaerythritol, for example.
• "Olibanum resinoid” is understood to mean Purified solid or semi solid amorphous product derived from Boswellia Serrata resinous gum.
• "Wax" is understood as organic synthetic or natural substances that characteristically consist of long linear or branched, saturated or unsaturated aliphatic or aromatic chains that can have various functional groups such as fatty acids, primary as well as secondary alcohols, ketones, aldehydes and fatty acid esters. Waxes can be solids (with a melting point between 50°C and 90°C) or liquids (fluids above 15°C). Select but non-limiting examples of solid waxes are carnauba wax, candelilla wax, rice wax, sunflower wax, sugarcane wax, beeswax and those of liquid waxes are jojoba wax, lanolins, butters.
• “Oils” are fluids that are flowable above 15°C and can be synthetic / petrochemical origin or of plant origin (such as long chain fatty acid triglycerides).
• “Plasticizers” are understood as materials that are incorporated in a composition to provide ductility.
All technical and scientific words used herein, unless otherwise defined, have the same meaning as commonly known by one having ordinary ability in the relevant field. The words "a" and "an" designate one or more (i.e., at least one) of the article's grammatical objects. Unless otherwise stated, weight is used to determine all percentages and ratios. All percentages and ratios are calculated based on the total final composition unless otherwise indicated.

As used herein, whether in a transitional phase or the body of a claim, the terms “comprise(s)” and “comprising” are to be interpreted as having an open-ended meaning. That is, the terms are to be interpreted synonymously with the phrases “having at least” or “including at least”. When used in the context of a process, the term “comprising” means that the process includes at least the recited steps but may include additional steps. When used in the context of a composition, the term “comprising” means that the composition includes at least the recited features or components but may also include additional features or components.

The present disclosure overcomes the aforesaid drawbacks of the prior art and other objects, features, and advantages of the present disclosure will now be described in greater detail. Also, the following description includes various specific details and, is to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that without departing from the scope and spirit of the present disclosure and its various embodiments there may be any number of changes and modifications described herein.

The numerical values given for various physical parameters, dimensions and quantities are only approximate values and it is envisaged that the values higher than the numerical value assigned to the physical parameters, dimensions and quantities fall within the scope of the disclosure unless there is a statement in the specification to the contrary.

Aspects of the present disclosure are further understood in light of the following examples, which should not be considered as limiting the scope of the present disclosure.

An aspects of the present disclosure provides a liposoluble strip-less wax composition comprising:
e. 0.5% to 10 wt% of extract of processed resinous gum exudates;
f. 60% to 72 wt% of esters of gum rosin and or compounds of rosin;
g. 5% to 20 wt% of thermoplastic elastomers; and
h. 5% to 40 wt% of waxes, oils, and butters in a cosmetically acceptable base.

An embodiment of the present disclosure provides, the extract of processed resinous gum exudate is olibanum resinoid, wherein the olibanum resinoid purchased from the Spiceor Bioneutralities, Kerala.

In an embodiment of the present disclosure provides, the extract of processed resinous gum exudates is purified and processed olibanum resinoid which may be a purified processed material (purified de-oil spent) after value recovery.

Another embodiment of the present disclosure provides, the esters of gum rosin and or compounds of rosin is selected from the list but not limited to glyceryl rosinate, pentaerythrityl rosinate, triethylene glycol rosinate, hydrogenated and partially hydrogenated rosin.

Yet another embodiment of the present disclosure, the thermoplastic elastomers which can be used as an essential constituent of the strip-less depilatory wax composition is taken from the list but not limited to synthetic elastomers chosen in particular from the groups which comprise: hydrocarbon resins such as polyethylene, ethylene-propylene copolymers or terpolymers, Ethylene-Octene copolymer, styrene-butadiene copolymers, ethylene-vinyl acetate (EVA) copolymers,, acrylic polymers, butadiene, isoprene, isoprene-isobutene, isobutene, chloroprene elastomers, polyester thermoplastic elastomers, LDPE, nitrile rubbers, Styrene-Butadiene Rubber, Butyl Rubber, Polychloroprene Rubber and Chlorinated Rubber.

In yet another embodiment of the present disclosure, the waxes are selected from the list but not limited to natural waxes including rice bran wax, carnauba wax, bees wax, candelilla wax, man-made waxes (synthetic waxes) including ozokerite wax, microcrystalline wax, paraffin waxes, polyethylene waxes and silicone waxes.

Further embodiment of the present disclosure, the butters are selected from the list but not limited to shea butter, mango butter, murumuru butter, cocoa butter, kokum butter, almond butter, coconut butter, macadamia butter, olive butter, hemp seed butter, jojoba butter, sal butter, mohua butter and neem butter. Natural butters like clarified butter and ghee also can be used.

Furthermore, embodiment of the present disclosure provides, the oil/s is selected from list but not limited to vegetable oils, hydrogenated and partially hydrogenated vegetable oils, silicone oils, paraffin oil (LLP) synthetic emollients and organic liposoluble emollients, wherein the vegetable oil/s is selected from coconut oil, castor oil, rice bran oil, sunflower oil, palm oil, palm kernel oil, olive oil, ground nut oil, sesame seed oil, neem oil, mustard oil and other fatty acid triglycerides. Fat from animal origin may also be used. Synthetic emollients such as hydrogenated polydecenes, Isohexadecane, Isododecane, C13-15 Alkane, C15-19 Alkane, C18-21 Alkane, C21-28 Alkane, can be used. Examples of liposoluble emollients includes among others but not limited to caprylic/capric triglycerides, isopropyl myristate, isopropyl palmitate and alkyl benzoates.

Some embodiment of the present disclosure provides, the cosmetically acceptable bases are selected from the group consisting of plasticizers, opacifiers, emollients, antioxidants, preservatives, fragrance, colours / pigment and skin benefiting agents including anti-allergenic agents or combination thereof.

Certain embodiment of the present disclosure provides, the composition may or may not comprises an opacifier selected from the list but not limited to titanium dioxide, zinc oxide, calcium oxide, magnesium oxide, calcium carbonate, magnesium carbonate, bentonite earth, multani Mitti, different coloured clays, talc and pearlizing agents.

In an embodiment of the present disclosure optionally consist of plasticizers selected from the list but not limited to triethyl citrate, some fatty acid and esters, fatty alcohols, benzoates, tartrates and chlorinated hydrocarbons, esters of adipic, azelaic and sebacic acid.

In an embodiment of the present disclosure provides, the preservatives are selected from Phenoxyethanol, ethylhexylglycerin and Capryl Glycol.

In an embodiment of the present disclosure provides, the antioxidants: Vitamin E acetate, Vitamin A, Selenium, Tocopherol, Tocotrienol, Butylated hydroxytoluene (BHT), Tert-butylhydroquinone (TBHQ), butylated hydroxyanisole (BHA), and Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate.

In an embodiment of the present disclosure provides, the skin benefit agents: Vitamin A, Vitamin C, Vitamin E, Vitamin K, Vitamin B5, Vitamin B6, Vitamin B12, Caffeine, Niacinamide, Kojic acid and derivatives, Azelaic acid, Hyaluronic acid and salt, Green tea extract, Aloe extract, Lemon extract, resorcinol derivatives, Lactic acid and salts, Glycolic and salts, Hydroquinone, Liquorice extract, Milk and milk derivatives, Saffron extract.

In an embodiment of the present disclosure provides the novel liposoluble strip-less depilatory wax composition preferably comprises of processed resinous gum exudates (Olibanum resinoid) 0.5% to 10% and more preferably 1% to 9% and most preferably 2% to 8% by weight, based on the weight of the total formulation.

In an embodiment of the present disclosure provides the novel liposoluble strip-less depilatory wax composition of the present disclosure comprises esters of rosin and or compounds of rosin preferably contains 60% to 72% and more preferably 61% to 71% and most preferably 62% to 70% by weight, based on the weight of the total formulation

In an embodiment of the present disclosure provides the novel liposoluble strip-less depilatory wax composition preferably comprises of thermoplastic elastomer 5% to 20% and more preferably 7% to 18% and most preferably 8% to 16% by weight, based on the weight of the total formulation.

In an embodiment of the present disclosure provides the novel liposoluble strip-less depilatory wax composition preferably comprises of cosmetically acceptable base 5% to 40% and more preferably 10% to 38% and most preferably 15% to 35% by weight, based on the weight of the total formulation.

In an embodiment of the present disclosure the cosmetically acceptable base comprises of wax up to 30%, butters up to 20%, and oils up to 15%, plastisizers and opacifiers up to 10% and other skin benefiting agents up to 5% by weight, based on the weight of the total formulation.

In an embodiment of the present disclosure provides a method to incorporate these ingredients into a cosmetically acceptable liposoluble strip-less depilatory wax.

The present disclosure provides a method for application of the liposoluble strip-less depilatory wax.

In an embodiment of the present disclosure provides the extract of processed olibanum resinous gum exudate that is prepared as described. After removal of essential oil, the cleaned crude Boswellia serrata (Olibanum resinoid also known as frankincense) gum, referred to as de-oiled spent material, is processed further by washing with water and water is decanted. Ethyl acetate is added to the residual solid and stirred under heat for 1hour. The solution is filtered, and the solution is transferred to the de-solventizer. Ethyl acetate is removed. Finally, the warm olibanum resinoid is transferred to open top drums.

EXAMPLES
Aspects of the present disclosure may be further understood in light of the following examples, which should not be considered as the limiting scope of the present disclosure.

The amounts of ingredient in all the compositions studied are expressed in weight%, based on the total weight of the cosmetic composition.

General Procedure for Preparing Different Formulations of Strip-less Depilatory Wax
All formulations were prepared as per the general method below.

1. The oil/s, waxes and butters as per formulation (as per Tables) were added to a heating vessel and heated till 150? with continuous stirring.
2. All the remaining components, except the fragrance, were added in any order to the above heated oil/s.
3. Once the temperature again reached to 150?, thoroughly mixed the contents in the vessel with continuous stirring at 150? for 2 hrs, cooled to 75? and then fragrance was added.
4. The mixing was continued for 30 more minutes.
5. The hot mixture was filled in the required container and allowed to cool to the ambient temperature. After preparing, the wax container was kept at room temperature for one day before evaluating the performance on consumers.
6. The material was stored under ambient condition and used as needed.

General Procedure of Waxing (Depilation) of Consumer Using Strip-less Wax
1. The prepared wax in the container was kept in the wax heater and heated just to melt and form a uniform thin liquid with spreadable consistency.
2. Consumers were allowed to sit in an air-conditioned parlor room for 15 minutes to acclimatize to the room condition.
3. Using a pre-wax gel, cleaned up the skin area where the hair was needed to be removed, (usually the hand/ under arm).
4. Once the pre-wax gel got dry, a thick layer of the melted wax was applied on the skin where the hair was needed to be removed and in the direction of the hair growth, using a spatula.
5. Once the applied wax became cool (solidified), keeping the skin tout (tight) with one hand, and gripping the edge of the applied wax, the strip was immediately pulled out towards the opposite direction of the hair growth and removed.
6. Once completed, post wax oil was applied to remove any waxy residue and smoothen the skin.
In this procedure a separate woven cloth strip was not required. The applied wax itself acted as strip.

Technical Expert Cum Consumer Evaluation Report
The consumer evaluation was done by a technical expert and also the consumer. The evaluation was done based on the following parameters: (1) ease of spreading, (2) ease of stripping, (3) skin feel after stripping, (4) comfort while stripping, (5) hair removal and (6) overall likability. Off these parameters, the feedback by the technical expert on the parameters #1 (ease of spreading), #2 (ease of stripping) and #5 (hair removal) were considered final. For the 4th parameter (comfort while stripping), the feedback was received only from the consumer. For the remaining parameters (3rd and 6th), the lower rating (inferior / Not Good) of the feedbacks from the technical expert and that from the consumer was considered. Ratings were based on assessment as Good (G) and Not Good (NG). No consumer reported any adverse reaction including irritation. All the results have been captured in Tables against the corresponding Formulation Code / Experiment No. This included the aspect of comfort of the consumer as well as effectiveness of hair removal (depilation).

Example 1: Incorporating Olibanum to Form Strip-less Depilatory Wax
It will be desirable to incorporate as little wt% of glyceryl rosinate as possible in a strip-less depilatory wax composition. The formulations and the observation / results are shown in Table 1.
Table 1: Composition of Olibanum with Rosinates, Elastomers and Plasticisers in Formation of Strip-less Depilatory Wax
Experiments 1A 1B 1C 1D 1E 1F 1G 1H
Ingredients % wt/wt
Olibanum Resinoid 0 0 0 1 4 8 5 5
Glyceryl Rosinate 72 71 70 69 66 65 65 65
Ethylene-vinyl acetate (EVA) 14 12 14 11 11 11 10 15
Paraffin wax 12 15 13 16 16 13 17 12
Mineral oil (LLP) 2 2 3 3 3 3 3 3
Total 100 100 100 100 100 100 100 100
Expert / Consumer Evaluation
Ease of Spreading G G G G G G G G
Ease of Stripping/ stripping without break G NG NG G G G NG G
Hair stripping from root G NG NG G G G NG G
Comfort while stripping G NG NG G G G NG G
Skin-feel after stripping G NG NG G G G NG G
Overall likability G NG NG G G G NG G
Note: G = Good; NG = Not Good

Expt.1 shows that by itself 72% Glyceryl rosinate in combination with the elastomer EVA form an acceptable product. Lowering the wt% of glyceryl rosinate (Expt. 1B and 1C) did not result in an acceptable strip-less depilatory wax. However, in combination with Olibanum resinoid the composition even with a reduced quantity (69%) of the glyceryl rosinate (e.g. Expt.1D) forms a good and usable strip-less depilatory wax. Also, Expts. 1G and 1H – both with 5% Olibanum resinoid and 65% glyceryl rosinate - show that suitable changes in formulation of elastomers and waxes / oils / butters can result in good strip-less depilatory wax product (Expt.1H).

Example 2: Incorporating Different Thermoplastic Elastomers to Form Strip-less Depilatory Wax
Thermoplastic elastomers are critical ingredients in the formation of the product, and it is important to understand the specificity of these ingredients in giving the desired performance profile. The formulations with varying elastomers and the observation / results are shown in Table 2.
Table 2: Composition of Olibanum with Rosinates with Different Elastomers in Formation of Strip-less Depilatory Wax
Experiments 2A 2B 2C 2D 2E 2F 2G
Ingredients % wt/wt
Olibanum Resinoid 5 5 5 5 5 5 5
Glyceryl Rosinate 65 65 65 65 65 65 65
Ethylene-vinyl acetate (EVA) 15 0 0 0 0 0 0
Polyethylene (homopolymer) 0 13 0 0 0 0 0
Ethylene-Octene copolymer 0 0 0 8 12 16 0
Natural rubber 0 0 0 0 0 0 13
Paraffin wax 12 14 14 19 15 11 14
Mineral oil (LLP) 3 3 3 3 3 3 3
Total 100 100 100 100 100 100 100
Expert / Consumer Evaluation
Ease of Spreading G G G G G G G
Ease of Stripping/ stripping without break G G G G G G NG
Hair stripping from root G G G G G G NG
Comfort while stripping G G G G G G G
Skin-feel after stripping G G G G G G G
Overall likability G G G G G G NG
Note: G = Good; NG = Not Good

The above results demonstrate that not only EVA but other thermoplastic elastomers – both homopolymers and heteropolymers (copolymers) were effective in forming strip-less depilatory wax. However, some polymers like Natural Rubber were not effective. Understanding this selectivity is very useful in formulating a suitable product.

Example 3: Incorporating Different Waxes, Oils and Butters to Form Strip-less Depilatory Wax
A self-forming strip should not only form a continuous and firm film but should also be flexible to stretching forces to function equivalent to a fabric. Different plasticisers when incorporated in a composition enhance this particular property. In the case of liposoluble strip-less waxes as described in the present application, liposoluble materials like waxes, oils and butters enhanced this property. Different formulations with different plasticisers and the observation / results are shown in Table 3.

Table 3: Composition of Olibanum with Rosinates with Different Waxes, Oils and Butters in Formation of Strip-less Depilatory Wax
Experiments 3A 3B 3C 3D 3E 3F 3G 3H 3I
Ingredients % wt/wt
Olibanum Resinoid 5 1 5 5 5 5 5 5 5
Glyceryl Rosinate 65 69 65 65 65 65 65 65 65
Ethylene-vinyl acetate (EVA) 11 11 11 11 11 11 11 11 11
Paraffin wax 19 0 0 0 0 16 16 16 16
Microcrystalline wax 0 16 0 0 0 0 0 0 0
Ceresine wax 0 0 16 0 0 0 0 0 0
Carnoba wax 0 0 0 16 0 0 0 0 0
Candelilla wax 0 0 0 0 16 0 0 0 0
Mineral oil (LLP) 0 3 3 3 3 0 0 0 0
Castor oil 0 0 0 0 0 3 0 0 0
Sunflower oil 0 0 0 0 0 0 3 0 0
Shea butter 0 0 0 0 0 0 0 3 0
Coco butter 0 0 0 0 0 0 0 0 3
Total 100 100 100 100 100 100 100 100 100
Expert / Consumer Evaluation
Ease of Spreading G G G G G G G G G
Ease of Stripping/ stripping without break G G G G G G G G G
Hair stripping from root G G G G G G G G G
Comfort while stripping G G G G G G G G G
Skin-feel after stripping G G G G G G G G G
Overall likability G G G G G G G G G
Note: G = Good; NG = Not Good

It is evident from the results presented that a diverse range of synthetic as well as natural waxes, oils and butters are suitable for formation of strip-less depilatory waxes having the required properties.

These results prove that the wax compositions in accordance with the present disclosure exhibit excellent hair removal properties; the applied wax was coming out as a single strip and constitutes a technical advancement in this field of application.

ADVANTAGES:
1. The present disclosure provides a synergistic novel liposoluble strip-less depilatory wax composition, which is having excellent hair binding / adhesion property compared to the market product consisting only rosin esters.
2. The present disclosure provides a novel synergistic liposoluble strip-less depilatory wax composition, which consists of lower amount of rosin esters and or rosin compounds compared to the known formulations consisting only rosin esters and or rosin compounds.
3. The present disclosure provides a novel strip-less depilatory wax composition which synergistically showing better performance when Olibanum resinoid is combined with rosin esters and or rosin compounds.
4. The present disclosure provides a personal care strip-less depilatory composition which surprisingly provides an excellent product for hair removal.
5. The present disclosure provides a personal care strip-less depilatory composition that provides ease of application and more skin friendliness.
6. The present disclosure provides a liposoluble strip-less depilatory wax composition that does not require woven strip or any other substrates to pull off the wax film formed on the skin to remove hair.
7. The present disclosure provides a liposoluble strip-less wax composition that the strip formed on the skin when applied does not break or tear while quickly pulling out to remove hair from skin.
8. The present disclosure provides a liposoluble strip-less wax composition easy to manufacture and is storage stable.
, Claims:We Claim:

1. A liposoluble strip-less wax composition comprising:
a) 0.5% to 10 wt% of extract of processed resinous gum exudates;
b) 60% to 72 wt% of esters of gum rosin and or compounds of rosin;
c) 5% to 20 wt% of thermoplastic elastomers; and
d) 5% to 40 wt% of waxes, oils, and butters in a cosmetically acceptable base.

2. The composition as claimed in claim 1, wherein the extract of processed resinous gum exudate is olibanum resinoid.

3. The composition as claimed in claim 1, wherein the esters of gum rosin and rosin compounds are selected from glyceryl rosinate, pentaerythritol rosinate, tri ethylene glycol rosinate and hydrogenated or partially hydrogenated rosin or combination thereof.

4. The composition as claimed in claim 1, wherein the thermoplastic elastomers which can be used as an essential constituent of the strip-less depilatory wax composition is taken from the list but not limited to synthetic elastomers chosen in particular from the groups which comprise: hydrocarbon resins such as polyethylene,ethylene-propylene copolymers or terpolymers, Ethylene-Octene copolymer, styrene-butadiene copolymers, ethylene-vinyl acetate (EVA) copolymers,, acrylic polymers, butadiene, isoprene, isoprene-isobutene, isobutene, chloroprene elastomers, polyester thermoplastic elastomers, LDPE, nitrile rubbers, Styrene-Butadiene Rubber, Butyl Rubber, Polychloroprene Rubber and Chlorinated Rubber or combination thereof.

5. The composition as claimed in claim 1, wherein the waxes are selected from rice bran wax, carnauba wax, bees wax, candelilla wax, ozokerite wax, microcrystalline wax, other man-made waxes, synthetic waxes such as silicone waxes and paraffin waxes or combination thereof.

6. The composition as claimed in claim 1, wherein the oil is selected from vegetable oils, hydrogenated and partially hydrogenated vegetable oils, silicone oils, paraffin oils, synthetic emollients and organic liposoluble emollients or combination thereof. wherein the vegetable oils are selected from coconut oil, castor oil, rice bran oil, sunflower oil, palm oil, palm kernel oil, olive oil, ground nut oil, sesame seed oil, neem oil, mustard oil or combination thereof.

7. The composition as claimed in claim 1, wherein the butters are selected from shea butter, mango butter, murumuru butter, cocoa butter, kokum butter, almond butter, coconut butter, macadamia butter, olive butter, hemp seed butter, jojoba butter, sal butter, mohua butter, neem butter and Natural butters like clarified butter and ghee or combination thereof.

8. The composition as claimed in claim 1, wherein the cosmetically acceptable bases are selected from the group consisting of skin-beneficial agents, plasticisers, opacifiers, emollients, antioxidants, preservatives, fragrance, and colours / pigment or combination thereof.

Dated this the 30th day of December, 2023

Anjan Sen
of Anjan Sen and Associates
(Applicants Agent & Advocate)
IN/PA-199