DESC:TECHNICAL FIELD:
The present disclosure relates to a cosmetic composition. More specifically, the present disclosure relates to a multi-component composition comprising hydrogen peroxide, peroxides based oxidizing agents such as persulfates, and silicone resin, in a cosmetically acceptable base. Also, the present disclosure provides a dual benefit of this composition, offering both brightness enhancement to the skin and a discernible bleaching effect.

BACKGROUND:
Background description includes information that may be useful in understanding the present invention. This review of prior and relevant art, including any publication directly or implicitly referred to herein is not an admission that the data presented in the present application is previous knowledge. The data presented in this background section is not fully pertinent to the invention currently being claimed and is being presented to help understand the current knowledge in the relevant field.

Current Challenges in Hydrogen Peroxide-Based Skincare Compositions and Their Limitations:
The highlights of the selective prior arts, focus on hydrogen peroxide and other peroxide-based compositions, emphasizing improvements in skin brightness, the integration of silicone compounds in hydrogen peroxide/persulfate-based compositions, and the utilization of silicone-based resins in skin bleaching and brightening formulations.

There are a few prior arts in the literature that focus on improving the skin bleaching and the brightening effect by the addition of different classes of physical exfoliators, viz. fatty alcohols, surfactants, clays, Alpha Hydroxy Acids, Beta Hydroxy Acids into hydrogen peroxide-based compositions. Below are a few examples.

US6325783B1 discloses a composition of emulsion cream-based hydrogen peroxide formulations containing fine abrasive particles, such as ground walnut shells, pumice, or sand. These particles were found to enhance the bleaching process of thick or calloused skin when continuously rubbed over the treatment period. However, incorporating physical fine abrasives into the formulation and continuously rubbing them onto the skin for up to 10 minutes, as mentioned in the art, may cause damage to the skin. Additionally, no data is provided on improving the bleaching effect or even the brightness value. The prior art does not teach any role of silicones. Present disclosure does not include the use of any physical exfoliators, and does not involve the use of any physical action to achieve brightness on the skin.

US11241369B2 discloses a composition that is persulfate-free and ammonia-free. Additionally, the brightening effect is enhanced through the usage of guanidine carbonate, arginine, monoethanolamine, triethanolamine, potassium hydroxide, sodium bicarbonate, or their combinations in an alkaline booster, as well as the incorporation of at least 30% fatty compounds (such as fatty alcohols, fatty acids, esters of a fatty acid and/or of a fatty alcohol, or their combinations) either in the hydrogen peroxide cream or in the alkaline booster. It also requires manganese dioxide as a catalyst. The prior art composition merely highlights the usage of surfactants (non-ionic and anionic) and claims novelty in using fatty compounds in hydrogen peroxide or in the activator composition to improve the brightening effect. Use of basic alkaline ingredients is potentially harmful to the skin. Further, no data has demonstrated the improvement in bleaching or brightening effect through the reported inventive composition. The present invention distinguishes itself from the prior art by incorporating peroxides, including persulfates, in combination with hydrogen peroxide, thereby achieving an enhanced bleaching effect, whereas the prior art remains persulfate-free. Furthermore, the inventive composition synergistically utilizes silicone resin, absent in the prior art, to provide the improved bleaching and brightness effect on the skin.

US5431911A discloses a cosmetic paste composition comprising hydrogen peroxide, a grain product selected from almond meal, oatmeal, and mixtures thereof, cosmetic clays, and benzoin. Cosmetic clays are provided with a wide range of examples, including china clay, colloidal kaolin, bentonite, other aluminum silicates, and Fuller's earth. Overall, the prior art claims that it is an effective facial bleacher and whitener, removing tan, freckles, and other superficial blemishes from the skin. The present invention completely excludes the usage of clays and grain-like particles or to provide bleaching and brightness enhancement to the skin.

US20220192941A1 discloses a skin rejuvenation emulsion cream composition that focuses on enhancing the skin exfoliation effect through the combination of hydrogen peroxide and a fatty compound, with 70% glycolic acid serving as a positive control in the evaluation. The prior art illustrates the lipid disruption values of the composition to indicate the exfoliation effect when used with a fatty compound. Additionally, the composition provides unlimited examples of the classes of surfactants and oxidizing agent stabilizing compounds for the invention. The prior art does not use additional critical ingredients like silicones for the enhancement of skin brightness. In contrast, though the present disclosure uses a fatty alcohol-based emulsion system, it does not use glycolic acid and uses silicones resins.

WO2012093103A3 discloses a two-part system composition. The first part utilizes peroxides, Alpha Hydroxy Acids (AHAs), Beta Hydroxy Acids (BHAs), and a polymeric system, while the second part contains a combination of anionic and amphoteric surfactant mixture and a gelling agent. The invention elucidates the limitations of using peroxides, AHAs, and BHAs in the foaming composition due to differences in pH. The cited prior art did not demonstrate the efficacy of the subject invention in terms of skin brightening; rather, only the viscosity and pH of the two parts post-mixture were determined, and satisfactory ones were shortlisted as inventive compositions. The present disclosure completely excludes the usage of AHAs and uses peroxide, persulfate and silicone resins as key functional differentiators for the technological advancement in the composition.

When specifically considering silicone resins in relation to our inventive composition, the utilization of silicone resins and their alkyl derivatives (excluding hydrogen peroxide & persulfates) has been widely employed in color cosmetics and sunscreen products for their good transfer properties, film formation, and wet resistance. Apart from color cosmetics, there are several prior art examples utilizing silicone resins in compositions such as cleansers, moisturizers, and emulsions with special applications. Below are the two examples of those prior arts.
US20030119685A1 discloses the use of silicone resin-based adhesive and silicone resin copolymer in the skin cleansing composition for barrier protection from surfactants or other materials in the composition that have skin irritation potential. This is attributed to the film-forming properties of the silicone resins that provide protection of the skin from skin irritants within and external to the cleansing composition. The silicone copolymer resin used herein is Trimethylsiloxysilicate in the solvent Isododecane. The present disclosure totally focuses on the compositional properties of hydrogen peroxide, persulfates, and of silicone resins in combination to deliver a superior skin bleaching and skin brightness.

US20170100311A1 discloses the use of silicone resins in skin care formulations. This prior art outlines the limitations of certain moisturizing lotions or other products where the film formation on the skin should not lead to easy removal, thus affecting the efficacy of the product. The silicone resins used here are 100% Trimethylsiloxy silicate resin, Trimethylsiloxy silicate and Polypropylsilsesquioxane. The prior art deals with a durable barrier cream skin treatment composition, does not use hydrogen peroxide and is not useful in skin bleaching or brightening. In contrast, the present disclosure utilizes alkyl-derived silicone resins exclusively in the hydrogen peroxide and persulfates-based composition and solely in the rinse-off application format to provide technological advancement.

A closely related prior art exists along the same lines, clearly demonstrating the usage of the silicone resins Trimethylsiloxy silicate and Polypropylsilsesquioxane in a clay-based skin composition.

WO2022023276A1 discloses a cosmetic mask the synergy of clay, titanium dioxide, and the mentioned silicone resin, which improves the skin brightness values, substantiated by instrumental evaluation data. This product does not use any peroxide and does not exhibit any bleaching property. The present application discloses the combination of hydrogen peroxide, persulfates, and alkyl-derived silicone resin, excluding clay and titanium dioxide.

While there are products available for skin bleaching, there are no products known in the market or reported in the literature that provide additional benefits. Such polyfunctional products are the need of the day and represent technological enhancement. Thus, there is a need to overcome the drawbacks of the prior art and to find a robust and stable composition based on hydrogen peroxide / persulfates to provide additional benefits such as visible brightening effects, along with delivering the desired bleaching effect. Surprisingly, it has been found that a composition comprising a peroxide / persulfates-based system and an alkyl-based silicone resin helps improve the brightness of the skin with the same contact time and usage pattern as the control composition, which contains only hydrogen peroxide / persulfate. This is in addition to the expected skin bleaching effect. The novelty or technological advancement lies in delivering the dual function of the composition: a brightening effect without disturbing the bleaching effect of hydrogen peroxide.

The present disclosure overcomes the deficiencies found in the prior art and delivers multiple benefits in a single composition and application that is superior to what the prevalent technologies can deliver.

OBJECTIVES:
An object of the present disclosure is to provide a topical skin care composition for cosmetic applications.

Another object of the present disclosure is to provide a stable multi-component skin tone modifying composition comprising hydrogen peroxide, peroxide based oxidizing agents such as persulfates, and silicone resins.

Yet another object of the present disclosure is to provide a composition that brightens the skin in addition to the bleaching effect of the hydrogen peroxide and peroxide based oxidizing agents such as persulfates.

Further, object of the present disclosure is to provide compositions that offer both visible bleaching and brightening effects with the same contact time and usage pattern.
Furthermore, object of the present disclosure is to provide a composition that offers a smooth and rich texture to the product and an excellent skin feel upon application.

SUMMARY:
This summary is provided to introduce a selection of concepts in a simplified form that is further described below in the detailed description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The present disclosure provides a multi-component cosmetic composition for skin tone modifying composition which is comprising hydrogen peroxide, peroxide based oxidizing agents such as persulfates, and silicon resin/s, in a cosmetically acceptable base.

An aspect of the present disclosure provides a multi-component skin tone modifying composition comprising: (i) 1.5 wt% to 6 wt% of hydrogen peroxide on 100% basis; (ii) 3.0 wt% to 4.0 wt% of a peroxide based oxidizing agent; and (iii) 1.5 wt% to 6.5 wt% of at least one silicone resin selected from MQ Silicone Resin/s and T-Propyl Silicone Resin/s in a solvent, formulated in a cosmetically acceptable base.

Another aspect of the present disclosure provides a stable 2-component skin tone modifying composition in which the “activator” component with the peroxide based oxidizing agent such as persulfates, in a suitable base and the “bleach” component with the hydrogen peroxide as well as the silicone resin/s in an acceptable base are combined immediately prior to application.

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 by a person skilled in the art and science of the field while remaining within the spirit of the present disclosure. 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.

Definition:
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.

As used herein, the term “cosmetic composition” is intended to describe compositions for topical application to skin, including leave-on and wash-off products wherein the delivery system comprises but not limited to creams, ointments, lotions, sticks, foams, sprays, packs, wraps, woven or nonwoven wipes, films or patches as a vehicle for topical application of the said cosmetic composition.

All composition described herein can be performed in suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the disclosure and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the disclosure.

The numerical values given for various physical parameters, dimensions and quantities are only approximate values and it is envisaged that the values higher or lower 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.
The term “skin” as used herein includes the skin on the face, neck, chest, back, arms, hands, and legs.

Reference throughout this specification to “an embodiment” or “in an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases “yet another embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The present disclosure overcomes the aforesaid drawbacks of the above, 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.

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 aspect of the present disclosure provides a stable multi-component skin tone modifying composition comprising (i) hydrogen peroxide, (ii) peroxide based oxidizing agents such as persulfates, and (iii) silicone resin/s in a cosmetically suitable base wherein the composition provides skin bleaching as well as superior skin brightening along with the desired and expected bleaching effect compared to the control bleach composition.

Another aspect of the present disclosure provides multi-component skin tone modifying composition comprising:1.5 wt% to 6 wt% of hydrogen peroxide on 100% basis; 3.0 wt% to 4.0 wt% of a peroxide based oxidizing agent; and 1.5 wt% to 6.5 wt% of at least one silicone resin selected from MQ Silicone Resin/s and T-Propyl Silicone Resin/s in a solvent, formulated in a cosmetically acceptable base.

An embodiment of the present disclosure provides the composition is a 2-component composition in which the activator component has the peroxide based oxidizing agent, in a suitable base while the bleach component has the hydrogen peroxide and the silicone resin in an acceptable base both being combined immediately prior to application.

In an embodiment of the present disclosure provides the peroxide-based oxidizing agent is selected from ammonium or alkali metal persulfates, perborates, percarbonates, peracids, and urea peroxides or combination thereof.

Another embodiment of the present disclosure provides the MQ resin is selected from Trimethylsiloxy Silicate and its derivatives, including Cyclopentasiloxane (and) Trimethylsiloxy Silicate, Dimethicone (and) Trimethylsiloxy Silicate, C24-28 Alkyl DimethylsiloxyTrimethylsiloxy Silicate (and) Isododecane, and Isododecane (and) Trimethylsiloxy Silicate/DimethiconolCrosspolymer or combination thereof.

Yet another embodiment of the present disclosure provides the T-Propyl resin is selected from Polypropyl Silsesquioxane and its derivatives, including Trimethylsiloxy Silicate (and) PolypropylSilsesquioxane, Cyclopentasiloxane (and) Polypropyl Silsesquioxane, Isododecane (and) Polypropyl Silsesquioxane, and C30-45 Alkyl Dimethylsilyl Polypropyl Silsesquioxane or combination thereof.

In yet another embodiment of the present disclosure provides the silicone solvent is selected from cyclomethylpolysiloxanes, siloxane-based oils, and alkyl-substituted polysiloxanes, including Cyclotrisiloxane, Cyclopentasiloxane, Dimethylpolysiloxane, Diphenyl Dimethylpolysiloxane, Lauryl Dimethylpolysiloxane, Phenyl Trimethylpolysiloxane, Triphenyl Trimethylpolysiloxane, and Phenyl Tris(Trimethylsiloxy)Silane or combination thereof.

Further another embodiment of the present disclosure provides the cosmetically acceptable base includes stabilizers, rheology modifiers, pearlisers, colours, perfumes and skin-benefit agents, such as UV protectants, moisturizers and anti-aging actives or combination thereof.

In an embodiment of the present disclosure provides the cosmetic composition for skin care, also suitable as a base for diverse skin care formulations/applications. This composition is a product containing hydrogen peroxide, persulfates, and silicone resin, in a silicone solvent to provide a brightening effect to the skin without disturbing the bleaching performance of hydrogen peroxide& persulfates, which is a core benefit of the composition. The inventive composition, along with providing a bleaching cum brightening effect to the skin, also provides a rich, smooth texture to the composition giving an excellent skin feel upon application.

In an embodiment of the present disclosure provides the selective finding of the present invention that only when a selective mixture of ingredients comprising suitable silicone compounds such as silicone resin is present in combination with hydrogen peroxide and persulfates, can a cosmetic composition be achieved wherein the ingredients provide for a stable composition, skin bleaching and a brightening effect to the skin. This is surprising and special since none of the silicone compounds in combination with hydrogen peroxide& persulfates are known to promote both brightening and bleaching effects on the skin, which, when provided only in combination, achieve such special and surprising beneficial attributes.

In an embodiment of the present disclosure provides the composition suitable for topical application to the skin and favors its end use and application in various skin care formulations for topical application adapted for delivering skin-benefiting properties.

Silicone Resins:
Silicone resins are highly cross-linked polymers comprised of a siloxane (silicon– oxygen) lattice with some portion comprised of the silicate (SiO4/2)n or silsesquioxane (R-SiO3/2)n structures, where R represents hydrogen, various alkyl (most commonly methyl) or aryl (typically phenyl)or alkenyl or alkoxyl organic groups. In comparison to organic resins (with their carbon-carbon backbone), silicone resins exhibit greater resistance to thermal and radiation degradation due to the strong nature of silicon oxygen bonds.

Silicone resins are highly cross-linked organo polysiloxanes consisting of irregular three-dimensional network of units with at least some portion comprised of the silicate skeleton or the silsesquioxane structures, often with various alkyl or aryl organic groups (most commonly methyl or phenyl). Silicone resins represent a broad range of structures, and their properties vary with their structures. These structures contribute to the unique properties of silicone resins, such as flexibility, heat resistance, and film-forming capabilities, making them valuable materials in various industrial and cosmetic applications. Commercial silicone resins are often available as a mixture of different types of silicone resins to achieve specific properties.

The MQ silicone resins are a type of silicone resins that have at least 80 mole %, alternatively 90 mole % of the total siloxane units as M and Q units. The MQ resins may also contain hydroxy groups. MQ Silicone resin is a co-hydrolysis product of tetraalkoxy silane (Q unit) and trimethylalkoxy silane (M unit).MQ resin is widely used in personal care products, and as adhesives, defoamers, and water proofing agents.

The T-propyl silicone resins are Propylsilsesquioxane resins where the majority of the siloxane units are T units of the general formula R3SiO3/2 where at least 40 mole %, alternatively 50 mole %, or alternatively 90 mole % of the R3 groups are propyl. Propylsilsesquioxane resin comprises at least 80 mole % of R3SiO3/2 units, where R3 is independently an alkyl group having from 1 to 8 carbon atoms, an aryl group, a carbinol group, or an amino group, and with the proviso that at least 40 mole % of the R3 groups are propyl.

100% Trimethylsiloxysilicate is a silicone resin known for its film-forming properties and excellent water resistance. It consists of siloxane units with trimethylsiloxy groups, providing flexibility and durability to cosmetic formulations such as sunscreens and long-wear makeup products.

Trimethylsiloxysilicate, along with polypropylsilsesquioxane, is another silicone resin commonly utilized in skincare and cosmetic formulations. Trimethylsiloxysilicate shares similar film-forming properties but offers enhanced spreadability and adhesion to the skin. Polypropylsilsesquioxane, on the other hand, is a hybrid organic-inorganic polymer that contributes to the smooth texture and improved skin feel in cosmetic products. Together, these silicone resins provide various benefits, including enhanced product stability, water resistance, making them valuable components in cosmetic formulations.

Properties of silicone resins can often be modulated by mixing different individual silicone resins. In fact, commercially available silicones are sold as blends of more than one silicone resins.

In an embodiment of the present disclosure, silicone resins may be selected from different classes of silicone compounds – more specifically MQ silicone resins, T-propyl silicone resins, Trimethylsiloxysilicate (Wyncare 7300 M) or combinations thereof.

MQ silicone resin Trimethylsiloxysilicate and its derivatives, including but not limited to, are selected from Cyclopentasiloxane (and) Trimethylsiloxysilicate (DC 749), Dimethicone (and) Trimethylsiloxy silicate, C24-28 Alkyl dimethylsiloxyTrimethylsiloxy silicate (and) Isododecane, C24-28 Alkyl dimethylsiloxyTrimethylsiloxy silicate (Granresin MQI-2450) (and) Dimethiconol, C24-28 Alkyl dimethylsiloxyTrimethylsiloxy silicate (and) Cyclopentasiloxane, C24-28 Alkyl dimethylsiloxyTrimethylsiloxy silicate (and) Dimethicone, Dimethicone (and) Trimethylsiloxy silicate /DimethiconolCrosspolymer, Isododecane (and) Trimethylsiloxy silicate /DimethiconolCrosspolymer or combinations thereof.

Polypropylsilsesquioxane and its derivatives are selected from, including but not limited to Trimethylsiloxy silicate (and) polypropylsilsesquioxane, Cyclopentasiloxane (and) Polypropylsilsesquioxane, Isododecane (and) Polypropylsilsesquioxane, C30-45 Alkyl dimethylsilylpolypropylsilsesquioxane (Dow SW 8005 C30 Resin wax) or combinations thereof.

Polymethylsilsesquioxane and its derivatives are selected from, including but not limited to Polymethylsilsesquioxane (and) Isododecane (Granresin PMSQ-ID), Polymethylsilsesquioxane/ Trimethylsiloxysilicate (Granresin MQI-T50) Isododecane, Polymethylsilsesquioxane (and) Dimethicone, Polymethylsilsesquioxane (and) Cyclopentasiloxane, Polymethylsilsesquioxane (and) Coconut alkane. The inventive composition comprises other general classes of silicone resin compounds, including methyl resins, phenyl resins, vinyl resins, polysiloxane resins, and combinations thereof.

Common solvents used for incorporating the silicone resins are volatile siloxane or organic solvent or can also be in an aqueous system as an emulsion. Any volatile siloxane or organic solvent can be selected provided that the resins are miscible with the solvent. The volatile siloxane solvent can be a cyclic polysiloxane, a linear polysiloxane, or mixtures thereof.

In an embodiment of the present disclosure provides, the silicone solvent is selected from the group consisting of cyclomethylpolysiloxane, cyclotrisiloxane, cyclotetrasiloxane, cyclopentasiloxane, cyclohexasiloxane, cycloheptasiloxane, dimethylpolysiloxane, diphenyl dimethylpolysiloxane, lauryl dimethylpolysiloxane, phenyl dimethylpolysiloxane, trimethylsiloxysilicate, diisostearyl trimethylolpropane siloxy silicate, dilauroyltrimetylolpropanesiloxy silicate, phenyl trimethylpolysiloxane, triphenyl trimethylpolysiloxane, hexamethyldisiloxane, dihydroxypolydimethylsiloxane, phenyl tris(trimethylsiloxy)silane, and combination thereof. Preferably, the silicone oil is selected from the group consisting of dimethylpolysiloxane, diphenyl dimethylpolysiloxane, lauryl dimethylpolysiloxane, phenyl dimethylpolysiloxane, phenyl trimethylpolysiloxane, triphenyl trimethylpolysiloxane, phenyl tris(trimethylsiloxy)silane and combination thereof. More preferably, the silicone oil is selected from dimethylpolysiloxane, phenyl tris(trimethylsiloxy)silane and combination thereof.

The silicone solvent can for example have a kinematic viscosity in the range of 1 to 10000 cSt (centiStokes), preferably 5 to 5000 cSt, more preferably 10 to 1000 cSt.

The organic solvent can be an alcohol such as methanol, ethanol, isopropanol, butanol, or n-propanol, a ketone such as acetone, methylethyl ketone, or methyl isobutyl ketone; an aromatic hydrocarbon such as benzene, toluene, or xylene; an aliphatic hydrocarbon such as heptane, hexane, octane, or isododecane; a glycol ether such as propylene glycol methyl ether, dipropylene glycol methyl ether, propylene glycol n-butyl ether, propylene glycol n-propyl ether, or ethylene glycol n-butyl ether, a halogenated hydrocarbon such as dichloromethane, 1,1,1-trichloroethane or methylene chloride, chloroform, dimethyl sulfoxide, dimethyl formamide, acetonitrile, tetrahydrofuran, white spirits, mineral spirits, or naphtha, or an ester.

In an embodiment of the present disclosure provides, the aqueous solvent is selected as an emulsion system comprising of non-ionic surfactants selected from Decyl Glucoside, Lauryl Glucoside, Cocamidopropyl Betaine, Ceteareth-20, Polysorbate 20, Polysorbate 80, and Alkyl Polyglucosides. Amphoteric surfactants may include Coco Betaine, Lauryl Betaine, Cocamidopropyl Hydroxysultaine, and Sodium Lauriminodipropionate. Additional non-ionic and amphoteric surfactants may comprise ethoxylated fatty alcohols, sorbitan esters, and block copolymers of ethylene oxide, propylene oxide and combination thereof.

One such example of silicone resin in emulsion base is Aqua, Decyl Glucoside, Isododecane, Propanediol, Trimethylsiloxysilicate (Granresin SiW-MQiZ).

Oxidizing agents:
Among the oxidizing agents used are conventionally used hydrogen peroxide, compounds capable of producing hydrogen peroxide by hydrolysis, such as urea peroxide, or peroxide-based salts such as perborates, percarbonates, and persulfates with hydrogen peroxide and persulfates being particularly preferred.

In an embodiment of the present disclosure provides, the oxidizing system is selected from the group consisting of hydrogen peroxide and peroxide-based oxidation system selected from the group consisting of perborates, percarbonates, percarboxylates and persulfates such as ammonium persulfate, or sodium persulfate, or potassium persulfate or combinations thereof. Bleaching compounds are primarily provided in the form of anhydrous products, powders, or creams containing alkaline compounds such as amines (e.g., monoethanolamine, triethanolamine) or alkali metal silicates (e.g., sodium silicate, potassium silicate), along with a peroxygenated reagent like ammonium or alkali metal persulfates (e.g., ammonium persulfate, sodium persulfate, potassium persulfate), perborates (e.g., sodium perborate), or percarbonates (e.g., sodium percarbonate).

Cosmetically Acceptable Base:
Cosmetically acceptable base or cosmetically suitable base comprises of combinations of diverse ingredients having different attributes that are collectively safe and compatible to skin and also compatible with the inventive composition being capable of forming a stable system. Commercially acceptable base also includes diverse compounds that are necessary for functionality as well as sensorial appeal.

Cosmetically acceptable base includes diverse skin benefit agents, including but not limited to, that are effective in skin-lightening, moisturizing, anti-aging, UV diffusing/protection, wrinkle-reduction, wound healing, sebum-regulating, anti-acne, as well as antimicrobials antioxidants, sunscreens, vitamins, minerals, proteins and the like which are stable in the acidic pH.

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 details of the invention are given in the following examples which are provided to illustrate the invention and therefore should not be construed to limit the scope of the invention.

EXAMPLES:
The present disclosure is further explained in the form of the following examples. However, it is to be understood that the foregoing examples are merely illustrative and are not to be taken as limitations upon the scope of the invention. Various changes and modifications to the disclosed embodiments will be apparent to those skilled in the art. Such changes and modifications may be made without departing from the scope of the invention.

The inventive composition of the present application is prepared and stored in at least 2 parts or components. All examples reported here are described only as a 2-component system in which one of the components has the peroxide based oxidizing agent (“activator”) such as persulfates, in a suitable base while the other component (“bleach”) has the hydrogen peroxide and the silicone resin in an acceptable base both being combined immediately prior to application.

All percentage compositions mentioned are in weight % (%w/w). Silicone resins were used as was commercially available. Hydrogen peroxide used was of 50% strength and actual amount on 100% basis will be half of what is mentioned.

Example #1: Control Composition and Preparation of Bleach Cream Without Silicone Resin
For comparison purposes, a reference composition without the silicone resin was prepared and it was to serve as a control. The composition used is given in Table 1A. Table 1B describes the composition of the minor constituents of the overall composition. This is an oil in water emulsion and is prepared following General Procedure #1.
Table 1A. O/W Emulsion of a Bleach Cream (without Silicone Resin)
S.No Phase Ingredients Expt #1A
Quantities (% w/w)
1 Phase A Cetostearyl alcohol 10.00
2 Stearic acid 2.00
3 Glyceryl Stearate (and) PEG-100 Stearate 5.00
4 Mineral Oil 5.00
5 Phase B DM water Qs 100
6 Disodium EDTA 0.10
7 Glycerin 2.00
8 Propylene glycol 0.50
9 Phase C DM water 10.00
10 Hydrogen peroxide (50%) 8.00
11 Etidronic acid 0.28
12 Phase D Minors Constituents as in Table 1B 0.5004
Total 100.0000

Table 1B. Composition of Minor Constituents of Bleach Cream
S.No Ingredients Quantities (% w/w)
1 Perfume 99.920
2 Color CI 60730 0.080
Total 100.00

General Procedure #1: Procedure For the Preparation of the O/W Bleach Cream Without Silicone Resins
1. Components of Phase A are taken in a vessel, and mixed while being heated to around 80°C.
2. In a separate vessel, Phase B ingredients are taken and heated to 80°C.
3. Phase A is then transferred with stirring to Phase B at 80°C and made into a homogeneous phase.
4. Once the emulsification process is completed, cool down the phase AB to 40°C and Phase C is added to Phase AB at 40°C and mixed well.
5. Finally, the remaining ingredients such as color and perfume (Minor Constituents) of Phase D under Table 1B are added and mixed till uniform.
6. The product is now ready for further steps like packaging etc and is suitable for consumer use.
Example #2: Composition and Preparation of Activator Powder
The composition of the activator powder which is used along with the hydrogen peroxide composition for skin bleaching is given in Table 2A and Table 2B.
Table 2A. Composition of the Activator Powder
S.No Phase Ingredients Expt #2A
Quantities (%w/w)
1 Phase A Potassium Persulfate 36.00
2 Sodium Meta silicate 27.00
3 Ammonium Bicarbonate 15.00
4 Magnesium carbonate hydroxide 5.00
5 Phase B Sodium Stearate 12.00
6 Maize Starch 0.10
7 Xanthan gum 0.10
8 Phase C Minors Constituents as in Table 2B 4.80
Total 100.000

Table 2B. Composition of Minor Constituents of the Activator Powder
S.No Phase Ingredients Quantities (% w/w)
1 Phase C Precipitated Silica 83.333
2 Perfume 16.667
Total 100.000
The activator powder was prepared following General Procedure #2.

General Procedure #2: Procedure For the Preparation of The Activator Powder
1. Sieve Sodium Meta Silicate Anhydrous using a 30-mesh sieve and collect the particles that pass through it for use. Then, add the other Phase A ingredient powders one by one. Ensure that all steps are performed with necessary precautions.
2. Weigh phase B ingredients and add to Phase A and homogenize well.
3. Weigh Phase C ingredients separately as per Table 2B and homogenize it as a premix.
4. Then add the indicated quantity of premix Phase C to Phase AB mixture and homogenize well to form a smooth, free-flowing powder.
5. The product is now ready for further steps like packaging etc and is suitable for consumer use.

The inventive skin bleach composition with silicone resin was prepared by replacing the mineral oil in traditional bleach cream composition with a silicone resin in a suitable organic or aqueous carrier, The details are given in Example #3.
Example #3: Composition and Preparation of Bleach Cream with Silicone Resin
The inventive compositions containing variable quantities of the silicone resin (Trimethylsiloxy silicate (and) Polypropylsilsesquioxane) in a carrier solvent Cyclopentasiloxane were prepared based on the composition as given in Table 3.
Table 1B describes the composition of the minor constituents of the overall composition. This is an oil in water emulsion and is prepared following the General Procedure #3.

General Procedure #3: Procedure For the Preparation of the O/W Bleach Cream with Silicone Resins
1. Components of Phase A are taken in a vessel, and mixed well while being heated to around 80°C.
2. In a separate vessel, the Phase B ingredients are taken and heated to 80°C until the mixture completely melts and forms a homogeneous liquid. Phase A is then transferred to Phase B at 80°C and mixed until a homogeneous mass is formed
3. In a separate vessel, Phase C ingredients are heated to 80°C. Phase AB is added to Phase C under stirring and stirring is continued till the completion of the emulsification.
4. Once the emulsification process is completed, cool down the Phase ABC to 40°C and Phase D is added to Phase ABC at 40°C and mixed well.
5. Finally, the remaining ingredients of Phase E (Minor Constituents under Table 1B) such as color and perfume are added and mixed till uniform. The product is now ready for further steps like packaging etc and is suitable for consumer use.

For all evaluations for efficacy, test samples of bleach creams as well as controls / reference samples were combined with the activator powder (Example #2 and General Procedure #2) immediately prior to application. General procedure for volunteer evaluation is given in General Procedure #4. Please note that the composition after mixing constitutes the inventive composition of the present application.

General Procedure #4: Volunteer Evaluation & Feedback
A. Study Protocol
The objective of this study is to evaluate the efficacy and safety of a face bleach product, along with its brightening effect, on volunteer participants. Volunteer participants aged 18-35 with varying skin type and skin tones are recruited, excluding individuals with sensitive skin, skin conditions, or recent facial treatments. The study is conducted in a controlled environment with room temperature maintained at 22-25°C and humidity levels between 55-70%. Air conditioning is utilized to ensure consistent conditions throughout the study. Before the study, participants are briefed on the potential risks and benefits of the face bleach product. A patch test is conducted on a small area of the skin to assess for any adverse reactions prior to full-face application. The study spans over a period of 30 minutes, during which volunteers are advised to avoid sunlight exposure and refrain from using soap for 24 hours afterward. The study is conducted in accordance with ethical guidelines, ensuring participant confidentiality, informed consent, and adherence to regulatory requirements. This study aims to provide valuable insights into the efficacy and safety of the face bleach product, contributing to the advancement of skincare research and consumer safety.

B. Sample Preparation and Application protocol
Prior to application, bleach cream composition of either Example #1Aor#3 to#8 or any other is mixed thoroughly with the activator composition of Example #2 in a ratio 10:1 (Bleach cream to Activator powder) and the mixture is immediately applied on the volunteer. Samples were coded blind, and half-face evaluation was conducted.
• Test Samples: The inventive composition (mixtures of each of the Bleach creams of Example #3 to #8 & the Activator powder of Example #2) was applied on one side of the face (left side)
• Control Sample: The control composition (Bleach cream of Example #1A &Activator powder of Example #2) was applied on the other side of the face (right side).
The contact time was typically 15 minutes but not exceeding 30 minutes. After this period, the face was washed with water, and volunteer feedback was collected.

C. Results& Feedback
Volunteers were asked to use the mirror under uniform light to evaluate the performance of the inventive compositions. The following questions were asked to the volunteers.
A) Any difference between both the sides of the face? Yes or No.
B) If yes, which side is brighter?
Technical Expert who is performing the study will also evaluate the below post mixing the Bleach cream and the Activator powder.
A) Texture
B) Ease of application
C) Bleaching effect
The feedback collected was directly recorded from volunteers in terms of Left side or Right side.

Now, the volunteer feedback for all bleach creams containing silicone resins (Examples #3 to # 8) versus the control bleach cream Example #1A has been summarized in a count format for easier understanding and is presented in Table #4.

Table #4: Observation and Inference of the Inventive Compositions Containing Silicone Resin (Trimethylsiloxy silicate (and) Polypropylsilsesquioxane)
Examples / Experiments
#3 #4 #5 #6 (Set 1) #6 (Set 2) #7 #8
Texture Smooth Smooth Smooth Smooth Smooth Viscous Viscous
Ease of application Easy Easy Easy Easy Easy Not easy Not easy
Brightnes (Volunteer preference) 0 / 5 0 / 5 7 / 9 9 / 10 21 / 27 0 / 5 0 / 7
Bleaching effect
(Assessment by Technical Expert) 100% Bleaching
Note 1: The results reflect assessment by volunteers and are represented as (number of volunteers who assess test sample performing better than control) / (total number of volunteers). In case of Example #6, 2 sets of assessments were performed as a confirmation of the inventive merit of the compositions.

As reported by the volunteers, see Table #4, in Examples #3, #4, #7 and #8, there were no differences in bleaching between each side of the face in any of these half-face evaluations. However, in Examples #5 and #6, it is evident that the Bleach cream with 2% and 5% respectively of silicone resin namely Trimethylsiloxysilicate (and) Polypropylsilsesquioxane demonstrated superior brightness. To validate the consistency and reproducibility of the results, the assessment of efficacy of Example #6 was carried out with an expanded volunteer pool.

The result of the study (Example #6 / Set 2) also confirmed the serendipitous result of superior performance of the inventive composition.

These results demonstrate that the stable skincare compositions, as disclosed in the present invention, provide enhanced brightness along with the desired bleaching effect, constituting a technical advancement in this field of application.

Additional silicone resins were incorporated into the bleach cream formulation and evaluated for their efficacy in enhancing skin brightness. The selection of these silicone resins was based on the demonstrated efficacy of the inventive composition containing Trimethylsiloxysilicate (and) Polypropylsilsesquioxane, representing MQ Silicone Resin and T Propyl Silicone Resin types, prompting the inclusion of their homologues / analogues / derivatives for further assessment.

Example #9 To Example #14: Compositions of Bleach Creams with Different Non-aqueous Silicone Resins
A series of bleach creams were formulated using the aforementioned types of silicone resins, replacing only Trimethylsiloxy Silicate (and) PolypropylSilsesquioxane in Examples #3 to #8. The silicone resins in their suitable non-aqueous solvents as commercially available were used to prepare 6 compositions from Example #9 to Example #14. The detailed compositions are given in Table #5.
Table #5: O/W Emulsion of Bleach Cream Compositions with Different Non-aqueous Silicone Resins
S.No Phase Ingredients Examples / Experiments

#9 #10 #11 #12 #13 #14
Amounts Of Ingredients Used (% w/w)

1 Phase A Cetostearyl alcohol 10.00 10.00 10.00 10.00 10.00 10.00
2 Stearic acid 2.00 2.00 2.00 2.00 2.00 2.00
3 Glyceryl Stearate (and) PEG-100 Stearate 5.00 5.00 5.00 5.00 5.00 5.00
4 Phase B Cyclopentasiloxane 12.5 12.5 12.5 12.5 12.5 12.5
5 Trimethylsiloxy silicate 5.00 - - - - -
6 C30-45 Alkyldimethylsilyl Polypropylsilsesquioxane - 5.00 - - - -
7 Cyclopentasiloxane (and) Trimethylsiloxysilicate - - 5.00 - - -
8 Isododecane (and) C24-28 AlkyldimethylsiloxyTrimethylsiloxysilicate - - - 5.00 - -
9 Isododecane (and) Polymethylsilsesquioxane/Trimethylsiloxysilicate - - - - 5.00 -
10 Polymethylsilsesquioxane (and) Isododecane - - - - - 5.00
11 Phase C DM water Qs 100 Qs 100 Qs 100 Qs 100 Qs 100 Qs 100
12 Disodium EDTA 0.10 0.10 0.10 0.10 0.10 0.10
13 Glycerin 2.00 2.00 2.00 2.00 2.00 2.00
14 Propylene glycol 0.50 0.50 0.50 0.50 0.50 0.50
15 Phase D DM water 10.00 10.00 10.00 10.00 10.00 10.00
16 Hydrogen peroxide (50%) 8.00 8.00 8.00 8.00 8.00 8.00
17 Etidronic acid 0.28 0.28 0.28 0.28 0.28 0.28
18 Phase E Minor Constituents as in Table 1B 0.5004 0.5004 0.5004 0.5004 0.5004 0.5004
Total 100.00 100.00 100.00 100.00 100.00 100.00
Note #1: Silicones resins as mentioned here are INCI names that show the ingredients of the commercial silicone resins as was commercially available and as was used in the experiments.
Note #2: The chemical nature of the silicone resins and their solvents are as follows: Trimethylsiloxy silicate = MQ Silicone Resin; C30-45 AlkyldimethylsilylPolypropylsilsesquioxane = Alkyl-Derived T Propyl Silicone Resin Wax; Trimethylsiloxysilicate = MQ Silicone Resin; C24-28 AlkyldimethylsiloxyTrimethylsiloxysilicate = Alkyl-Derived MQ Silicone Resin; Polymethylsilsesquioxane / Trimethylsiloxysilicate = T Methyl Silicone Resin / MQ Silicone Resin; Polymethylsilsesquioxane = T Methyl Silicone Resin; Cyclopentasiloxane = Volatile Silicone; Isododecane = Hydrocarbon Solvent.

The inventive compositions containing silicone resin were prepared based on the composition as given in Table #5. Table 1B describes the composition of the minor constituents of the overall composition. This is an oil in water emulsion and is prepared following the General Procedure #3 described earlier. Further, the bleach compositions were evaluated by mixing these individually with activator powder and applying on volunteers in accordance with the details in General Procedure #4.

Finally, an MQ silicone resin in an aqueous surfactant system (Aqua, Decyl Glucoside, Isododecane, Propanediol, and Trimethylsiloxysilicate), was used to prepare a bleach cream.

Example #15: Composition And Preparation Of Bleach Cream With Aqueous Silicone Resin
The inventive compositions containing silicone resin in an aqueous systemwas prepared based on the composition as given in Table #6. Table 1B describes the composition of the minor constituents of the overall composition. This is an oil in water emulsion and is prepared following the General Procedure #5.
Table #6: O/W Emulsion of Bleach Cream with MQ Silicone Resin in an Aqueous Surfactant System
S.No Phase Ingredients Example / Expt #15
Quantities (% w/w)
1 Phase A Cetostearyl alcohol 10.00
2 Stearic acid 2.00
3 Glyceryl Stearate (and) PEG-100 Stearate 5.00
4 Cyclopentasiloxane 12.5
6 Phase B DM water Qs 100
7 Disodium EDTA 0.10
8 Glycerin 2.00
9 Propylene glycol 0.50
10 Phase C DM water 10.00
11 Aqua, Decyl Glucoside, Isododecane, Propanediol, Trimethylsiloxysilicate 5.00
12 Phase D DM water 10.00
13 Hydrogen peroxide (50%) 8.00
14 Etidronic acid 0.28
15 Phase E Minor Constituents as in Table 1B 0.5004
Total 100.00

General Procedure #5: Procedure For the Preparation of the O/W Bleach Cream with
Aqueous Silicone Resins
1. Components of Phase A are taken in a vessel, and mixed well while being heated to around 80°C.
2. In a separate vessel, Phase B ingredients are taken and heated well (80°C) until the mixture melts to form a homogeneous liquid. Phase A is then transferred to Phase B at 80°C and made into a homogeneous mass under stirring and stirring is continued till the completion of the emulsification. Once the emulsification process is completed, cool down the Phase AB to 40°C.
3. Prepare Phase C in a separate container and mix well to form a homogenous solution. Transfer Phase C into the vessel containing Phase AB and homogenize well.
4. Prepare Phase D in a separate container and mix well to form a homogenous solution. Transfer Phase D into the vessel containing Phase ABC and homogenize well.
5. Finally, the remaining ingredients Minor Constituents (Phase E) under Table 1B such as color and perfume are added and mixed till uniform. The product is now ready for further steps like packaging etc and is suitable for consumer use.

All the bleaching creams with silicone resins were evaluated among volunteers following the General Procedure #4. The results are given in Table #7.

Table #7: Observation And Inference of The Inventive Compositions Containing Diverse Silicone Resin
Examples / Experiments
#9 #10 #11 #12 #13 #14 #15
Texture Smooth Smooth Smooth Smooth Smooth Viscous Viscous
Ease of application Easy Easy Easy Easy Easy Not easy Not easy
Brightness (Volunteer preference) 0 / 7 2 / 14 1 / 7 1 / 7 4 / 14 5 / 14 4 / 14
Bleaching effect
(Assessment by Technical Expert) 100% Bleaching
Note 1: The results reflect assessment by volunteers and are represented as (number of volunteers who assess test sample performing better than control) / (total number of volunteers).

Upon evaluating a diverse range of silicone resins, it became evident that only MQ Silicone Resin and T-Propyl Silicone Resin—Trimethylsiloxy Silicate (and) PolypropylSilsesquioxane—which forms a core aspect of the technological advancement of the present invention, exhibited bleaching as well as superior skin brightness when incorporated into a bleach composition comprising hydrogen peroxide and persulfates.

It was recognized that as a bleaching and brightening product, oxidizing agents play a crucial role. Accordingly, the influence of variations in the concentrations of Hydrogen Peroxide were studied.

Example #16, #17 : Composition and Preparation of Bleach Cream with Silicone Resin and Varying Percentages of Hydrogen Peroxide
As a representative case, Example 6, which contains Trimethylsiloxy Silicate and PolypropylSilsesquioxane, was chosen. This composition demonstrated superior skin-brightening performance. To assess the impact of Hydrogen Peroxide on bleaching and potential skin brightness, Example 6 was modified with different concentrations (3%, 2%, and 1%) of hydrogen peroxide while maintaining a constant Silicone resin percentage. These variations are presented as Examples #16, #17, and #18 under Table #8.

The inventive compositions containing silicone resin was prepared based on the composition as given in Table #8. Table 1B describes the composition of the minor constituents of the overall composition. This is an oil in water emulsion and is prepared following the General Procedure #3.

These compositions of the bleaching creams with silicone resins and varying percentages of hydrogen peroxide were evaluated among volunteers following the General Procedure #4.

The results are given in Table #9.
Table #9: Observation And Inference of the Inventive Compositions Containing Varying Concentrations of Hydrogen Peroxide (50%)
Examples / Experiments
#16 #17 #18
Texture Smooth Smooth Smooth
Ease of application Easy Easy Easy
Brightness (Volunteer preference) 5 / 7 6 / 7 5 /7
Note 1: The results reflect assessment by volunteers and are represented as (number of volunteers who assess test sample performing better than control) / (total number of volunteers).

It is evident that, regardless of the Hydrogen Peroxide concentration, the inventive synergistic composition of Silicone resin consistently delivered significant skin brightening, as perceived by volunteers in the consumer study. ,CLAIMS:We Claim,

1. A multi-component skin tone modifying composition comprising:
(i) 1.5 wt% to 6 wt% of hydrogen peroxide on 100% basis;
(ii) 3.0 wt% to 4.0 wt% of a peroxide based oxidizing agent; and
(iii) 1.5 wt% to 6.5 wt% of at least one silicone resin selected from MQ Silicone Resin/s and T-Propyl Silicone Resin/s in a solvent,
formulated in a cosmetically acceptable base.

2. The composition as claimed claim 1, wherein the composition is a 2-component composition in which the activator component has the peroxide based oxidizing agent, in a suitable base while the bleach component has the hydrogen peroxide and the silicone resin in an acceptable base both being combined immediately prior to application.

3. The composition as claimed in claim 1, wherein the peroxide-based oxidizing agent is selected from ammonium or alkali metal persulfates, perborates, percarbonates, peracids, and urea peroxides or combination thereof.

4. The composition as claimed in claim 1, wherein the MQ resin is selected from Trimethylsiloxy Silicate and its derivatives, including Cyclopentasiloxane (and) Trimethylsiloxy Silicate, Dimethicone (and) Trimethylsiloxy Silicate, C24-28 Alkyl DimethylsiloxyTrimethylsiloxy Silicate (and) Isododecane, and Isododecane (and) Trimethylsiloxy Silicate/DimethiconolCrosspolymer or combination thereof.

5. The composition as claimed in claim 1, wherein the T-Propyl resin is selected from Polypropyl Silsesquioxane and its derivatives, including Trimethylsiloxy Silicate (and) PolypropylSilsesquioxane, Cyclopentasiloxane (and) Polypropyl Silsesquioxane, Isododecane (and) Polypropyl Silsesquioxane, and C30-45 Alkyl Dimethylsilyl Polypropyl Silsesquioxane or combination thereof.

6. The composition as claimed in claim 1, wherein the silicone solvent is selected from cyclomethylpolysiloxanes, siloxane-based oils, and alkyl-substituted polysiloxanes, including Cyclotrisiloxane, Cyclopentasiloxane, Dimethylpolysiloxane, Diphenyl Dimethylpolysiloxane, Lauryl Dimethylpolysiloxane, Phenyl Trimethylpolysiloxane, Triphenyl Trimethylpolysiloxane, and Phenyl Tris(Trimethylsiloxy)Silane or combination thereof.

7. The composition as claimed in claim 1, wherein the cosmetically acceptable base includes stabilizers, rheology modifiers, pearlisers, colours, perfumes and skin-benefit agents, such as UV protectants, moisturizers and anti-aging actives or combination thereof.