Photoprotective cosmetic compositions

Abstract

A photoprotective cosmetic composition comprising at least one chemical sunscreen, a sunscreen solubilizing / stabilizing agent, a wax, and a silicone elastomer is provided. The weight ratio of the silicone elastomer to the wax is in a range of about 10:1 to about 1:10. The photoprotective cosmetic composition may be anhydrous and can further comprise a liquid carrier.

Description

FIELD OF THE INVENTION

[0001] The disclosure relates to the field of photoprotective cosmetic or dermatological compositions. More particularly, the disclosure relates to the field of photoprotective cosmetic compositions comprising at least one chemical sunscreen, a sunscreen solubilizing / stabilizing agent, a wax, and a silicone elastomer. BACKGROUND OF THE INVENTION

[0002] Consumers desire for new cosmetic products with high photoprotective efficacy for the health of their skin, which in turn poses a big technical challenge to the cosmetic industry.

[0003] It is well known that sunlight or ultraviolet radiation in the UV-B range has a wavelength of 290 nm to 320 nm and is the primary cause of sunburn, and Ultraviolet rays at a wavelength of 320 nm to 400 nm (UV-A radiation) will cause tanning of the skin and can also damage or harm the skin. The essential ingredients of photoprotective products are sunscreens that have the capacity of filtering or blocking the harmful UVA and UVB rays.

[0004] Commercial photoprotective products are regulated. For example, the sunburn protection provided by the photoprotective products is officially rated by the Sun Protection Factor (SPF) value. Because SPF values are determined from a test that measures protection against sunbum caused by UVB radiation, SPF values focus on rating a photoprotective product’s UVB protection.

[0005] Also, active photoprotective ingredients are tightly regulated. For example, only a limited selection of active photoprotective ingredients are allowed and their respective concentrations are restricted. These tight regulations make it extremely expensive or even impossible to commercialize new active photoprotective ingredients or use allowed sunscreens at high concentrations for better photoprotective efficacy. In order to meet the consumers’ ever-increasing appetite for new products with high photoprotective efficacy, the cosmetic industry has been investing heavily on finding cosmetic compositions that can boost photoprotective efficacy. However, this endeavor has only seen limited successes over the years.

[0006] This disclosure is directed to unexpected photoprotective cosmetic compositions exhibiting synergistic photoprotective efficacy boosts that comprise at least one chemical sunscreen, a sunscreen solubilizing / stabilizing agent, a wax, and a silicone elastomer. DETAILED DESCRIPTION OF THE INVENTION

[0007] Definitions and Conventions

[0008] The term, "comprising" means that a list of elements is not necessarily limited to those explicitly recited.

[0009] As used herein, "cosmetically acceptable" means that compositions or components are suitable for use in contact with human keratinous tissue.

[0010] As used herein, “naturally occurring” means existing by nature and without artificial aid.

[0011] As used herein, the term “sunscreen” refers to a compound or an active that has photoprotection efficacy. The sunscreens may be organic or inorganic. An organic sunscreen is also called a chemical sunscreen. An inorganic sunscreen is also called a physical sunscreen.

[0012] As used herein, the term "molecular weight" refers to the weight average molecular weight, unless otherwise stated.

[0013] As used herein, the term "QS" means sufficient quantity for 100%.

[0014] Unless otherwise stated: all numerical amounts are understood to be modified by the word "about," all percentages are by weight of the total cosmetic composition, and all ratios are weight ratios.

[0015] It should be understood that every numerical range expressly recited herein will include every narrower numerical range that falls within such broader numerical range, as if such narrower numerical ranges were all expressly recited herein.

[0016] As used herein, the singular forms “a,” ‘'an,” and '‘the” include the plural reference unless the context clearly dictates otherwise. Thus, for example, a reference to “an element” is a reference to one or more elements and includes equivalents thereof known to those skilled in the art. Similarly, for another example, a reference to “a step” or “a means” is a reference to one or more steps or means and may include sub-steps and subservient means.

[0017] As used herein, a sentence reciting a string of alternates is to be interpreted as if a string of sentences were provided such that each given alternate was provided in a sentence by itself. For example, the sentence “In some embodiments, the composition comprises A, B, or C” is to be interpreted as if written as the following three separate sentences: “In some embodiments, the composition comprises A. In some embodiments, the composition comprises B. In some embodiments, the composition comprises C.” As another example, the sentence “In some embodiments, the composition comprises at least A, B, or C” is to be interpreted as if written as the following three separate sentences: “In some embodiments, the composition comprises at least A. In some embodiments, the composition comprises at least B. In some embodiments, the composition comprises at least C.”

[0018] As used herein, “and / or” means “and” or “or”. For example, “A and / or B” means “A, B, or both A and B,” and “A, B, C, and / or D” means “A, B, C, D, or a combination thereof,” and said “A, B, C, D, or a combination thereof’ means any subset of A, B, C, and D, for example, a single member subset (e.g., A or B or C or D), a two-member subset (e.g., A and B; A and C; etc.), or a three-member subset (e.g., A, B, and C; or A, B, and D; etc.), or all four members (e.g., A, B, C, and D).

[0019] PHOTOPROTECTIVE COSMETIC COMPOSITIONS

[0020] The photoprotective cosmetic composition of this disclosure comprises at least one chemical sunscreen, a sunscreen solubilizing / stabilizing agent, a wax, and a silicone elastomer.

[0021] The photoprotective cosmetic composition of this disclosure may be in the form of emulsions (e.g., oil-in-water, water-in-oil, silicone-in-water, water-in-silicone, water-in-oil-in-water, oil-in-water, oil-in-water-in-oil. oil-in-water-in-silicone, etc.), creams, lotions, solutions, anhydrous bases, gels, ointments, pastes, milks, liquids, aerosols, and solid forms. An anhydrous composition comprises less than 0.01% water by weight of the total photoprotective cosmetic composition. Preferably, the photoprotective cosmetic composition of this disclosure is anhydrous.

[0022] In some preferred embodiments, the photoprotective cosmetic composition comprises at least one UVA chemical sunscreen, at least one UVB chemical sunscreen, a sunscreen solubilizing / stabilizing agent, a wax. and a silicone elastomer. Preferably, the photoprotective cosmetic composition comprises a UVA chemical sunscreen, at least one UVB chemical sunscreen, a sunscreen solubilizing / stabilizing agent, a wax, and a silicone elastomer. More preferably, the photoprotective cosmetic composition comprises a UVA chemical sunscreen, at least three UVB chemical sunscreens, a sunscreen solubilizing / stabilizing agent, a Triglyceride, a silicone elastomer, and a liquid carrier. Most preferably, the photoprotective cosmetic composition is anhydrous and comprises a UVA chemical sunscreen, at least three UVB chemical sunscreens, a sunscreen solubilizing / stabilizing agent, a Triglyceride, a silicone elastomer, and a liquid carrier.

[0023] Advantageously, the photoprotective cosmetic compositions disclosed herein show unexpected synergistic photoprotective efficacy boosts. In some preferred embodiments, the photoprotective cosmetic compositions of the disclosure may be formulated to have an SPF (Sun Protective Factor) value greater than 40. Calculation of SPF values is well known in the art.

[0024] A. SUNSCREENS

[0025] The photoprotective cosmetic composition of this disclosure may comprise at least one chemical sunscreen. The total amount of the at least one chemical sunscreen present in the photoprotective cosmetic composition may range from about 10% to about 40%, preferably from about 15% to about 30%, more preferably from about 20% to about 25% by weight of the total photoprotective cosmetic composition.

[0026] In some preferred embodiments, the at least one chemical sunscreen comprises chemical sunscreens selected from the group consisting of UVA chemical sunscreens, UVB chemical sunscreens, and mixtures thereof. Preferably, the at least one chemical sunscreen comprises at least one UVA chemical sunscreen and at least one UVB chemical sunscreens. More preferably, the at least one chemical sunscreen comprises a UVA chemical sunscreen and at least three UVB chemical sunscreens. 1. UVA Chemical Sunscreens

[0027] The term "UVA chemical sunscreen" means a chemical compound that blocks UV radiation in the wavelength range of about 320 to 400 nm. Preferred UVA chemical sunscreens are dibenzoylmethane compounds having the general formula:

[0028] wherein Ri is H, OR and NRR wherein each R is independently H, C1-20 straight or branched chain alkyl; R2 is H or OH; and R3 is H, C1-20 straight or branched chain alkyl. 5

[0029] Preferred is where Ri is OR where R is a C1-20 straight or branched alkyl, preferably methyl; R2 is H; and R3 is a C1-20 straight or branched chain alkyl, more preferably, butyl.

[0030] Examples of suitable UVA chemical sunscreen compounds of this general formula include 4-methyldibenzoylmethane, 2-methyldibenzoylmethane, 4 10 isopropyldibenzoylmethane, 4-tert-butyldibenzoylmethane, 2,4-dimethyldibenzoylmethane. 2,5-dimethyldibenzoylmethane, 4,4'diisopropylbenzoylmethane. 4-tert-butyl-4'-methoxy dibenzoylmethane. 4,4'-diisopropylbenzoylmethane, 2-methyl-5-isopropyl-4'-methoxydibenzoymethane, 2-methyl-5-tert-butyl-4'-methoxy dibenzoylmethane, and so on. Particularly preferred is 4-tert-butyl-4'-methoxydibenzoylmethane, also referred to as 15 Avobenzone. Avobenzone is commercially available from Givaudan-Roure or DSM under the trademark Parsol 1789, and Merck & Co. under the tradename Eusolex 9020, and Symrise under the tradename Neo Heliopan 357, and has the INCI name of Butyl Methoxy dibenzoylmethane and a structure according to the following formula:

[0031] Other types of UVA chemical sunscreens include dicamphor sulfonic acid derivatives, such as ecamsule, a sunscreen sold by Chimex under the trade name Mexoryl SX, which is terephthalylidene dicamphor sulfonic acid, having the structure according to the following formula:

[0032] In the preferred embodiment, the photoprotective cosmetic composition comprises at least one dibenzoylmethane sunscreen. More preferably, the photoprotective cosmetic composition comprises Butyl Methoxy dibenzoylmethane.

[0033] In some embodiments, the photoprotective cosmetic composition may comprise at least one UVA chemical sunscreen. The total amount of the at least one UVA chemical sunscreen present in the photoprotective cosmetic composition may range from about 0.1% to about 8%, preferably from about 1.5% to about 4.5%, more preferably from about 2 to about 4% by weight of the total photoprotective cosmetic composition. 2. UVB Chemical Sunscreens

[0034] The term "UVB sunscreen" means a compound that blocks UV radiation in the wavelength range of from about 290 to 320 nm. A variety of UVB chemical sunscreens exist including alpha-cyano-beta, beta-diphenyl acrylic acid esters as set forth in U.S. Pat. No. 3,215,724, which is hereby incorporated by reference in its entirety’. One particular example of an alpha-cyano-beta, beta-diphenyl acrylic acid ester is Octocrylene. which is 2-ethylhexyl 2-cyano-3,3-diphenylacrylate. Suitable amounts of Octocry lene range from about 0.001-10% by weight. Octocrylene may be purchased from BASF under the tradename Uvinul N-539, from DSM under tradename Parsol 340, and from Symrise under the tradename Neo Heliopan 303, and has a structure according to the following formula:

[0035] Other suitable sunscreens include benzy lidene camphor derivatives as set forth 5 in U.S. Pat. No. 3,781,417, which is hereby incorporated by reference in its entirety7. Such benzylidene camphor derivatives have the general formula:

[0036] wherein R is p-tolyl or sty ryl, preferably sty ryl. Particularly preferred is 4-methylbenzylidene camphor, which is a lipid soluble UVB sunscreen compound sold under 10 the tradename Eusolex 6300 by7 Merck, and Neo Heliopan MBC by Symrise, and Parsol 5000 by7 DSM, having a structure according to the following formula:

[0037] Also suitable are cinnamate derivatives having the general formula: OR CH=CH—C—Ri

[0038] wherein R and Ri are each independently a C1-20 straight or branched chain alkyl. Preferred is where R is methyl and Ri is a branched chain C1-10, preferably Cx alky l. The preferred compound is ethylhexyl methoxycinnamate, also referred to as Octinoxate or octyl 5   methoxy cinnamate. Octinoxate may be purchased from Givaudan Corporation and DSM under the tradename Parsol MCX, or BASF under the tradename Uvinul MC 80, or Symrise under the tradename Neo Heliopan AV, or Ashland under the tradename Escalol 557, having a structure according to the following structure: 0 10

[0039] Also suitable are mono-, di-, and triethanolamine derivatives of such methoxy cinnamates including diethanolamine methoxycinnamate. Cinoxate, the aromatic ether derivative of the above compound is also acceptable. If present, the Cinoxate should be found at no more than about 3% by weight of the total photoprotective cosmetic composition.

[0040] Also suitable as UVB screening agents are various benzophenone derivatives 15 having the general formula: Ri R Rs Re R3 R4 R9 R8

[0041] wherein R through R9 are each independently H, OH. NaOsS, SO3H. SOsNa, Cl, R", OR" where R" is C1-20 straight or branched chain alkyl Examples of such compounds include Benzophenone 1, 2. 3, 4, 5. 6, 7, 8, 9. 10. 11. and 12. Particularly preferred is where the benzophenone derivative is Benzophenone 3 (also referred to as Oxybenzone), Benzophenone 4 (also referred to as Sulisobenzone), Benzophenone 5 (Sulisobenzone Sodium), and the like. Most preferred is Benzophenone 3, which may be purchased under the tradename Uvinul M-40 and NeoHeliopan BB, having the structure according to the following formula: OH O

[0042] Also suitable are certain menthyl salicylate derivatives having the general formula:

[0043] wherein Ri, R2, Rs, and R4 are each independently H, OH, NH2, or C1-20 straight or branched chain alkyl. Particularly preferred is where Ri, R2, and Rs are methyl and R4 is hydroxyl or NH2, the compound having the name homomenthyl salicylate (also known as Homosalate) or menthyl anthranilate. Menthyl anthranilate is commercially available from Haarmann & Reimer under the tradename Heliopan. Homosalate is available commercially from Merck under the tradename Eusolex HMS, and from Symrise under the tradename Neo 5 Heliopan HMS, and from DSM under the tradename Parsol HMS, having the structure according to the following formula:

[0044] If present, the Homosalate should be present at no more than about 15% by weight of the total photoprotective cosmetic composition. 10

[0045] Various amino benzoic acid derivatives are suitable UVB absorbers including those having the general formula: COORi NR2R3

[0046] wherein Ri, R2, and Rs are each independently H. C1-20 straight or branched chain alkyl which may be substituted with one or more hydroxy groups. Particularly preferred 15 is wherein Ri is H or Ci-s straight or branched alkyl, and R2 and R3 are H, or Ci-s straight or branched chain alkyl. Particularly preferred are PABA, ethyl hexyl dimethyl PABA (Padimate O), ethyldihydroxypropyl PABA, and the like. If present Padimate O should be found at no more than about 8% by weight of the total photoprotective cosmetic composition.

[0047] Salicylate derivatives are also acceptable UVB absorbers. Such compounds have the general formula: wherein R is a straight or branched chain alkyd, including derivatives of the above compound formed from mono-, di-, or triethanolamines. Particular preferred are octyl salicylate, TEA-salicylate, DEA-salicylate, and mixtures thereof. Octyl salicylate has the INCI name Ethylhexyl Salicylate, and may be purchased from Ashland under the tradename Escalol 587, and Merck under the tradename Eusolex OS, and has the structure according to the following formula:

[0048] In some embodiments, the photoprotective cosmetic composition may comprise at least one UVB chemical sunscreen. The total amount of the at least one UVB chemical sunscreen present in the photoprotective cosmetic composition may range from about 5% to about 40%, preferably from about 10% to about 30%, more preferably from about 15% to about 25% by weight of the total photoprotective cosmetic composition.

[0049] In some preferred embodiments, the at least one UVB chemical sunscreen comprises at least three UVB chemical sunscreens. Preferably, the at least three UVB chemical sunscreens are selected from the group consisting of alpha-cyano-beta, beta-diphenyl acrylic acid esters, benzylidene camphor derivatives, cinnamate derivatives, benzophenone denvatives, menthyl salicylate denvatives, amino benzoic acid derivatives, Salicylate derivatives, and mixtures thereof. More preferably, the at least three UVB chemical sunscreens are selected from the group consisting of Octocrylene, 4-methylbenzyhdene camphor, Octinoxate, Cinoxate. Benzophenone 3, Benzophenone 4, Benzophenone 5. Homosalate, PABA, Ethyl Hexyl Dimethyl PABA, Ethyldihydroxypropyl PABA, Ethylhexyl Salicylate. TEA-Salicylate, DEA-Salicylate, and mixtures thereof. More preferably, the at least three UVB chemical sunscreens are selected from the group consisting of Octocrylene, Octinoxate, Cinoxate, Benzophenone 3, Elomosalate, PABA, Ethylhexyl Salicylate, and mixtures thereof. Most preferably, the at least three UVB chemical sunscreens comprise Octocrylene, Elomosalate, and Ethylhexyl Salicylate.

[0050] B. SUNSCREEN SOLUBILIZING / STABILIZING AGENTS

[0051] In some embodiments, the photoprotective cosmetic composition comprises a sunscreen solubilizing / stabilizing agent. The sunscreen solubilizing / stabilizing agent is a compound that can improve the solubility and / or stability of at least one sunscreen ingredient.

[0052] Exemplary sunscreen solubilizing / stabilizing agents may include C12-15 Alkyl Benzoate. Butyloctyl Salicylate, PPG-15 Stearyl Ether Benzoate, and Dicaprylyl Carbonate. Preferably, the photoprotective cosmetic composition comprises Butyloctyl Salicylate.

[0053] The sunscreen solubilizing / stabilizing agent present in the photoprotective cosmetic composition of this disclosure may range from about 1% to about 10%, preferably from about 2% to about 8%, more preferably from about 4% to about 6% by weight of the total photoprotective cosmetic composition.

[0054] C. WAX

[0055] In some embodiments, the photoprotective cosmetic composition comprises a wax. The wax may be naturally occurring or non-naturally occurring. Preferably, the wax is naturally occurring.

[0056] Non-limiting examples of waxes include Aluminum Distearate, Aluminum Trioctanoate, Aluminum / Magnesium Hydroxide Stearate, Dibenzylidine Sorbitol, Dibutyl Ethylhexanoyi Glutamide, Dibutyl Lauroyl Glutamide. Long Chain Alky l Polyacrylate, Stearoyl Inulin, Dextrin Palmitate, Tricontanyl / PVP, Octadecene / MA Copolymer, Bis-Peg-12 Dimethicone Candelillate, Sorbitol / Sebacic Acid Copolymer Behenate, Poly C10-30 Alkyl Acrylate, Polyvinyl Stearate, Polyethylene, Polyethylene Copolymers, Polyamides, Fatty Alcohols, Fatty Acids, Glycerides (including Mono-, Di-, and Triglycerides, for example, Mono / Di / Tri Glyceryl Behenate; preferably Triglycerides including Tribehenin, Tristearin, Trihydroxy stearin, Tripalmitin, and Cl 8-36 Acid Triglyceride), Natural Waxes (including Beeswax, Carnauba, and Candellila), and Hydrocarbons (including Ozokerite, Microcrystalline, Paraffin).

[0057] In some preferred embodiments, the photoprotective cosmetic composition comprises a Triglyceride. A Triglyceride is an ester derived from glycerin and three fatty acids. Nonlimiting examples of suitable Triglycerides include Tribehenin, Tristearin, Trihydroxy stearin, Tripalmitin, and Cl 8-36 Acid Triglyceride. Preferably, the Triglyceride is a triester of a long chain fatty acid. More preferably, the long chain fatty acid is a saturated fatty acid having a chain length of 18 to 36 carbons. Most preferably, the long chain fatty acid is linear. Nonlimiting examples of such Triglycerides include Tribehenin, Tristearin, Tripalmitin, and the like. Particularly preferably, the Triglyceride is a triester of behenic acid. The triester of glycerin and behenic acid has the INCI name of Tribehenin.

[0058] The wax may be present in the photoprotective cosmetic compositions at a level of greater than 1% and less than 20 wt.%. more preferably from about 1.5 % to about 15%, most preferably from about 2% to about 10%, and particularly preferably from about 2% to about 6% by weight of the total photoprotective cosmetic composition.

[0059] In some embodiments, the weight ratio of the wax to the at least one UVA chemical sunscreen is from about 7:1 to about 1:5, preferably from about 5:1 to about 1:3, more preferably from about 2:1 to about 1:2.

[0060] D. SILICONE ELASTOMER

[0061] The photoprotective cosmetic composition comprises a silicone elastomer. Preferably, the silicone elastomer is crosslinked and formed by the reaction of vinyl terminated silicone (e.g. , uni-, di-, or multi-vinyl terminated silicone) and hydrogen dimethicone. More preferably, the vinyl terminated silicone is bis-vinyldimethicone. Most preferably, the silicone elastomer has the INCI name of Poly silicone-11.

[0062] The silicone elastomer may be in the form of powder, solution, suspension, or gel. Preferably, the silicone elastomer is in the form of gel. The gel of the silicone elastomer may be purchased from Grant industries under the trade name Gransil.

[0063] The silicone elastomer may be present in the photoprotective cosmetic compositions at a level of from about 0.1% and to about 20%, more preferably from about 1% to about 15%, most preferably from about 2% to about 10%, and particularly preferably from about 3% to about 5% by weight of the total photoprotective cosmetic composition.

[0064] In some embodiments, the weight ratio of the silicone elastomer to the wax is from about 10:1 to about 1:10, preferably from about 7:1 to about 1:7. more preferably from about 5:1 to about 1:5, most preferably from about 2:1 to about 1:2.

[0065] E. LIQUID CARRIER

[0066] The protective cosmetic composition of this disclosure may further comprise a liquid carrier. Such liquid carriers aid the formation of a stable formula and / or the formation of a protective layer on the skin. The liquid carrier may be selected from the group consisting of water, mono alcohols, polyols, esters, ethers, silicone oils, or mixtures thereof. Preferably, the liquid carrier of this disclosure comprises at least one silicone oil. More preferably, the at least silicone oil is selected from the group consisting of Dimethicone. Dimethiconol, Cyclopentasiloxane, Phenyl Trimethicone, and mixture thereof. Most preferably, the liquid carrier of this disclosure comprises Phenyl Trimethicone.

[0067] The liquid carrier is present in the photoprotective cosmetic composition in an amount ranging from about 45% to about 90%, preferably from about 50% to about 80%, and more preferably from 60% to about 70% by weight of the total photoprotective cosmetic composition.

[0068] In some preferred embodiments, the photoprotective cosmetic composition of this disclosure comprises at least one UVA chemical sunscreen, at least three UVB chemical sunscreens, a sunscreen solubilizing / stabilizing agent, a wax, a silicone elastomer, and a liquid carrier; wherein the at least one UVA chemical sunscreen comprises Butyl Methoxy dibenzoylmethane; the at least three UVB chemical sunscreens comprise Octocrylene, Homosalate, and Ethylhexyl Salicylate; the sunscreen solubilizing / stabilizing agent is Butyloctyl Salicylate; the wax is Tribehenin; the silicone elastomer is Polysilicone-11; the liquid carrier is Phenyl Trimethicone; and wherein Butyl Methoxydibenzoylmethane is present in an amount of from about 0.1% to about 8%. preferably from about 1.5% to about 4.5%, more preferably from about 2% to about 4% by weight of the total photoprotective cosmetic composition; Octocrylene is present in an amount of from about 3% to about 13%, preferably from about 5% to about 12%, more preferably from about 8% to about 10% by weight of the total photoprotective cosmetic composition; Homosalate is present in an amount of from about 2% to about 15%, preferably from about 4% to about 12%, more preferably from about 6% to about 8% by weight of the total photoprotective cosmetic composition; Ethylhexyl Salicylate is present in an amount of from about 2% to about 7%, preferably from about 3% to about 6%, more preferably from about 4% to about 5% by weight of the total photoprotective cosmetic composition; Butyloctyl Salicylate is present in an amount of from about 1% to about 10%, preferably from about 2% to about 8%, more preferably from about 4% to about 6% by weight of the total photoprotective cosmetic composition; Tribehenin is present in an amount of at a level of greater than 1% and less than 20%, preferably from about 1.5% to about 15%, more preferably from about 1.5% to about 10%. most preferably from about 2 to about 6% by weight of the total photoprotective cosmetic composition; Polysilicone-11 is present in an amount of from about 1% to about 15%, preferably from about 2% to about 10%, more preferably from about 3 to about 5% by weight of the total photoprotective cosmetic composition; and Phenyl Trimethicone is present in an amount of from about 45% to about 90%, preferably from about 50% to about 80%, more preferably from 60% to about 70% by weight of the total photoprotective cosmetic composition.

[0069] In some more preferred embodiments, the photoprotective cosmetic composition of this disclosure comprises a UVA chemical sunscreen, three UVB chemical sunscreens, a sunscreen solubilizing / stabilizing agent, a wax, a silicone elastomer, and a liquid carrier; wherein the UVA chemical sunscreen is Butyl Methoxy dibenzoylmethane present in an amount of from about 0.1% to about 8%; wherein the three UVB chemical sunscreens comprise Octocrylene present in an amount of from about 3% to about 13%, Homosalate present in an amount of from about 2% to about 10%, and Ethylhexyl Salicylate present in an amount of from about 2% to about 7%; wherein the sunscreen solubilizing / stabilizing agent is Butyl octyl Salicylate present in an amount of from about 1% to about 10%; wherein the wax is Tribehenin present in an amount of at a level of greater than 1% and less than 20%; wherein the silicone elastomer is Polysilicone-11 present in an amount of from about 1% to about 15%; wherein the liquid carrier is Phenyl Trimethicone present in an amount of from about 45% to about 90%; and wherein all amounts are by weight of the total photoprotective cosmetic composition.

[0070] In some most preferred embodiments, the photoprotective cosmetic composition of this disclosure comprises a UVA chemical sunscreen, three UVB chemical sunscreens, a sunscreen solubilizing / stabilizing agent, a wax, a silicone elastomer, and a liquid carrier; wherein the UVA chemical sunscreen is Butyl Methoxy dibenzoylmethane present in an amount of from about 2% to about 4%; wherein the three UVB chemical sunscreens comprise Octocrylene present in an amount of from about 8% to about 10%, Homosalate present in an amount of from about 6% to about 8 %, and Ethylhexyl Salicylate present in an amount of from about 4% to about 5%; wherein the sunscreen solubilizing / stabilizing agent is Butyl octyl Salicylate present in an amount of from about 4% to about 6%; wherein the wax is Tribehenin present in an amount of from about 2% to about 6%; wherein the silicone elastomer is Polysilicone-11 present in an amount of from about 3% to about 5%; wherein the liquid carrier is Phenyl Trimethicone present in an amount of from about 60% to about 70%; and wherein all amounts are by weight of the total photoprotective cosmetic composition.

[0071] In some alternative more preferred embodiments, the photoprotective cosmetic composition of this disclosure comprises Butyl Methoxydibenzoylmethane present in an amount of from about 0.1% to about 8%. preferably from about 1.5% to about 4.5%, more preferably from about 2% to about 4%; Octocrylene present in an amount of from about 3% to about 13%, preferably from about 5% to about 12%. more preferably from about 8% to about 10%; Homosalate present in an amount of from about 2% to about 15%. preferably from about 4% to about 12%. more preferably from about 6% to about 8%; Ethylhexyl Salicylate present in an amount of from about 2% to about 7%, preferably from about 3% to about 6%, more preferably from about 4% to about 5%; Butyloctyl Salicylate present in an amount of from about 1% to about 10%, preferably from about 2% to about 8%, more preferably from about 4% to about 6%; Tribehenin present in an amount of at a level of greater than 1% and less than 20%, preferably from about 1.5% to about 15%, more preferably from about 1.5% to about 10%, most preferably from about 2 to about 6%; Polysilicone-11 present in an amount of from about 1% to about 15%, preferably from about 2% to about 10%, more preferably from about 3 to about 5%; and Phenyl Trimethicone present in an amount of from about 45% to about 90%, preferably from about 50% to about 80%, more preferably from 60% to about 70%; wherein the weight ratio of Tribehenin to Butyl Methoxydibenzoylmethane is from about 7:1 to about 1:5, preferably from about 5:1 to about 1:3, more preferably from about 2:1 to about 1:2; and wherein the weight ratio of Poly silicone-11 to the Tribehenin is from about 10:1 to about 1:10, preferably from about 7:1 to about 1:7, more preferably from about 5:1 to about 1:5, most preferably from about 2:1 to about 1:2; wherein the photoprotective cosmetic composition is anhydrous; and wherein all amounts are by weight of the total photoprotective cosmetic composition.

[0072] In some alternative most preferred embodiments, the photoprotective cosmetic composition of this disclosure comprises Butyl Methoxydibenzoylmethane present in an amount of from about 1.5% to about 4.5%, Octocrylene present in an amount of from about 5% to about 12%, Homosalate present in an amount of from about 4% to about 12%, Ethylhexyl Salicylate present in an amount of from about 3% to about 6%, Butyloctyl Salicylate present in an amount of from about 2% to about 8%, Tribehenin present in an amount of from about 1.5% to about 15%, Poly silicone-11 present in an amount of from about 2% to about 10%. and Phenyl Trimethicone present in an amount of from about 50% to about 80%; wherein the weight ratio of the Tribehenin to Butyl Methoxy dibenzoylmethane is from about 5:1 to about 1:3; wherein the weight ratio of Poly silicone-11 to Tribehenin is from about 7:1 to about 1:7; wherein the photoprotective cosmetic composition is anhydrous; and wherein all amounts are by weight of the total photoprotective cosmetic composition.

[0073] In some particularly preferred embodiments, the photoprotective cosmetic composition of this disclosure comprises Butyl Methoxy dibenzoylmethane present in an amount of from about 2% to about 4%, Octocrylene present in an amount of from about 8% to about 10%, Homosalate present in an amount of from about 6% to about 8%, Ethylhexyl Salicylate present in an amount of from about 4% to about 5%, Butyloctyl Salicylate present in an amount of from about 4% to about 6%, Tribehenin present in an amount of from about 2 to about 6%, Polysilicone-11 present in an amount of from about 3 to about 5%, and Phenyl Trimethicone present in an amount of from 60% to about 70%; wherein the weight ratio of Tribehenin to Butyl Methoxy dibenzoylmethane is from about 2:1 to about 1:2; and wherein the weight ratio of Poly silicone-11 to Tribehenin is from about 2:1 to about 1:2; wherein the photoprotective cosmetic composition is anhydrous; and wherein all amounts are by weight of the total photoprotective cosmetic composition.

[0074] F. ADDITIONAL INGREDIENTS

[0075] Photoprotective cosmetic compositions herein may include additional active agents. The type of active agents added can be any that are suitable for use in a topical composition. For example, the composition can further comprise moisturizing actives, agents used to treat age spots, keratoses and wrinkles, as well as anti-acne agents, antibacterial agents, antiyeast agents, antifungal agents, antidandruff agents, antidermatitis agents, antipruritic agents, anti-irritant agents, anti-dry skin agents, antiseborrheic agents, antiaging agents, antiwrinkle agents, additional sunscreen agents, antihistamine agents, skin lightening agents, depigmenting agents, wound-healing agents, vitamins, or self-tanning agents. The abovedescribed active agents are optional components of the photoprotective cosmetic compositions and may be omitted without materially affecting the photoprotective function of the sunscreen composition.

[0076] The photoprotective cosmetic compositions can also include emollients which may be, but not limited to, stearyl alcohol, cetyl alcohol, oleyl alcohol, isocetyl alcohol, fatty alcohols, propane- 1,2-diol, butane-1,3-diol, octadecan-2-ol, glyceryl monostearate, isopropyl isostearate, stearic acid, isostearic acid, isocetyl stearate, isopropyl stearate, butyl stearate, isopropyl laurate, hexyl laurate, decyl oleate, isobutyl palmitate, cetyl palmitate, isopropyl palmitate, palmitic acid, dimethylpolysiloxane, glyceryl monoricinoleate, di-n-butyl sebacate, isopropyl myristate, butyl myristate, myristyl myristate, isopropyl linoleate, lauryl lactate, myristyl lactate, polyethylene glycol, triethylene glycol, lanoline, acetylated lanolin, sesame oil, coconut oil, arrachis oil, castor oil, mink oil, mineral oil, and petroleum.

[0077] Preservatives can also be added to the photoprotective cosmetic compositions to provide a prolonged shelflife. Suitable preservatives include, but are not limited to, potassium sorbate, imidazolidinyl urea, p-hydroxy benzoate, esters of p-hydroxybenzoic acid, CTFA designation parabens, ethylhexylglycerin, caprylyl glycol / phenoxyethanol / hexylene glycol, etc. Other preservatives suitable for use in the photoprotective cosmetic compositions are disclosed in the International Cosmetic Ingredient Dictionary and Handbook, twelfth edition, 2004, the entire disclosure of which is herein incorporated by reference.

[0078] Humectants which may be used include, but not limited to, polyhydric alcohols including, glycerol, polyalkylene glycols, and alkylene polyols and mixtures thereof, hyaluronic acid. urea, glycerin, sorbitol, sodium 2-pyrrolidone-5-carboxylate. soluble collagen, dibutylphthalate, and gelatin.

[0079] The photoprotective cosmetic compositions may optionally comprise a fragrance in an amount sufficient to make the composition more appealing to the consumer. Preferably, the fragrance is present in an amount from about 0.01% to about 10% (w / w) by total weight of the composition.

[0080] The photoprotective cosmetic compositions may also include powders such as organic or inorganic powders, soft focus powders, plate-like non-spherical powders such as bismuth oxychloride, boron nitride, barium sulfate, mica, sericite, muscovite, synthetic mica, titanium oxide coated mica, titanium oxide-coated bismuth oxychloride, titanium oxide coated talc, platelet iron oxides, metal powders such as aluminum, lauroyl lysine and platelet talc. Amounts of such powders are not critical, but if used, typically will be present in an amount of about 0.5 to about 5% (w / w).

[0081] The photoprotective cosmetic compositions may also include additional ingredients such as, but not limited to, structuring agents, surfactants, pigments, conditioning agents, and dyes. EXPERIMENTS AND EXAMPLES

[0082] The representative examples that follow are intended to help illustrate the invention, and are not intended to, nor should they be construed to, limit the scope of the invention. Indeed, various modifications of the invention and many further embodiments thereof, in addition to those shown and described herein, will become apparent to those skilled in the art from the full contents of this document, including the examples which follow and the references to the scientific and patent literature cited herein. The following examples contain important additional information, exemplification and guidance, which can be adapted to the practice of this invention in its various embodiments and the equivalents thereof. Example 1: Exemplary Compositions and In Vitro SPF

[0083] The ingredients used for the preparation of the exemplary compositions are: Dowsil 556 Cos Grade Fluid / SF1550 (purchased from Dow Coming, INCI: Phenyl Trimethicone), Parsol 340 (purchased from DSM, INCI: Octocrylene), Eusolex HMS / Neo Heliopan HMS (purchased from Merck or Symrise, INCI: Homosalate), Hallbrite BHB (purchased from Hallstar, INCI: Butyloctyl Salicylate), Neo Heliopan OS (purchased from Symrise, INCI: Ethylhexyl Salicylate), Parsol 1789 (purchased from DSM, INCI: Butyl Methoxy dibenzoylmethane), Syncrowax HR-C (purchased from Croda, INCT: Tribehenin), Gransil PM-LC (20% solution in Phenyl Trimethicone, purchased from Grant Industries, INCI: Poly silicone-11).

[0084] The exemplary compositions (Samples 1-22, as in Tables 1-3 that show the ingredient list and corresponding ingredient amounts for each exemplary composition) were prepared according to the following procedure: 1) the chemical sunscreens, Butyloctyl Salicylate. Phenyl Trimethicone, and Tnbehenin were combined and heated to 90°C with mixing until the solution is clear; 2) the resulting solution of step 1) was cooled down to 70°C; 3) Polisilicone-11 were added into the resulting solution of step 2) with continued mixing until homogeneous; 4) the resulting mixture of step 3) was cooled down to room temperature.

[0085] The in vitro Sun Protection Factor (SPF in vitro) values of the exemplary compositions were measured by using a spectrophotometer (e.g., Labsphere UV-2000S Ultraviolet Transmittance Analyzer) and calculated according to the protocol described in the guideline for an in vitro test published by COLIPA (the European Cosmetic, Toiletry and Perfumery Association) in 2011. The “SPF in vitro” is defined by COLIPA as “the absolute protection performance of a sun care product against erythema-inducing radiation, calculated from the measured in vitro transmittance and weighted with the erythema action spectrum.” Such “SPF in vitro” includes the consideration of the protection from UVA radiation in a very different way from the UVB radiation focused Sun Protection Factor (SPF) rating currently used for labeling the commercial photoprotective cosmetic product. Nevertheless, it is recognized in the field that the value of such “SPF in vitro” is very useful to determine relative photoprotection effectiveness of different cosmetic compositions.

[0086] Tables 1, 2, and 3 show the exemplary compositions (Samples 1-22) and their SPF in vitro values.

[0087] The experimental data of Samples 1-11 show that when sunscreen ingredients don't change, Samples 2, 3. 4, 7, 8, 9, 10. and 11 show synergistic sun protection boosting effects, when being compared to Sample 1 (having wax but no elastomer). Sample 5 (having elastomer but no wax), and sample 8 (no wax and no elastomer).

[0088] The weight percentage of the wax and the weight ratios of the wax to the sunscreen or the silicone elastomer are important for the synergistic effects, as the experimental data shown. For example, the SPF in vitro value of Sample 11 is much lower than that of Sample 10, despite of the fact that Sample 11 contains higher amount of the wax (Tribehenin, 20%) than Sample 10 does (15%). In addition, Sample 6 has the low wax amount (Tribehenin, 1%) and does not show the synergistic effects, while the elastomer and the sunscreens of Sample 6 are the same as those of Samples 3 and 7.

[0089] Samples 20, 21, and 22 show that when a composition contains very low amount of sunscreens, adding wax and elastomer does not trigger meaningful synergistic 5 effects. In the meantime, Samples 12, 13, 14, and 15 show that when a composition contains moderate amount of sunscreens, the addition of wax and elastomer still brings significant synergistic effects. This synergistic effect also is present in the composition with the high sunscreen amount, as shown in the experimental data of Samples 16, 17, 18, and 19. 10 Table 1: Exemplary compositions (Samples 1-8) and their corresponding SPF in vitro values. INCI Name 1 2 3 4 5 6 7 8 Phenyl Trimethicone 68.5 67.5 64.5 56.5 67.5 66.5 61.5 71.5 Octocrylene 9.0 9.0 9.0 9.0 9.0 9.0 9.0 9.0 Homosalate 7.0 7.0 7.0 7.0 7.0 7.0 7.0 7.0 Butyloctyl Salicylate 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Ethylhexyl Salicylate 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 Butyl Methoxy dibenzoylmethane 3.0 3.0 3.0 3.0 3.0 3.0 3.0 3.0 Tribehenin 3.0 3.0 3.0 3.0 0 1.0 6.0 0 Polysilicone-11 0 1.0 4.0 12.0 4.0 4.0 4.0 0 SPF In Vitro 47.88 75.79 76.87 136.18 53.75 59.12 232.77 38.36 Synergy (yes or no or N / A) N / A yes yes yes N / A no yes N / A Table 2: Exemplary compositions (Samples 9-15) and their corresponding SPF in vitro values. INCI Name 9 to 11 12 13 14 15 Phenyl Trimethicone 57.5 52.5 47.5 85.75 82.75 81.75 78.75 Octocrylene 9.0 9.0 9.0 4.50 4.50 4.50 4.50 Homosalate 7.0 7.0 7.0 3.50 3.50 3.50 3.50 Butyloctyl Salicylate 5.0 5.0 5.0 2.50 2.50 2.50 2.50 Ethylhexyl Salicylate 4.50 4.50 4.50 2.25 2.25 2.25 2.25 Butyl Mcthoxydibcnzoylmcthanc 3.0 3.0 3.0 1.5 1.5 1.5 1.5 Tribehenin 10.0 15.0 20.0 0 3.0 0 3.0 Poly silicone-11 4.0 4.0 4.0 0 0 4.0 4.0 SPF In Vitro 271.32 334.35 235.2 27.04 23.43 27.65 45.97 Synergy (yes or no or N / A) yes yes yes N / A N / A N / A yes Table 3: Exemplary compositions (Samples 16-22) and their corresponding SPF in vitro values. INCI Name 16 17 18 19 20 21 22 Phenyl Trimethicone 48.0 49.6 56.0 57.0 85.8 77.8 73.8 Octocrylene 12.63 12.63 12.63 12.63 2.27 2.27 2.27 Homosalate 9.82 9.82 9.82 9.82 1.77 1.77 1.77 Butyloctyl Salicylate 7.02 7.02 7.02 7.02 1.26 1.26 1.26 Ethylhexyl Salicylate 6.32 6.32 6.32 6.32 1.14 1.14 1.14 Butyl Methoxy dibenzoylmethane 4.21 4.21 4.21 4.21 0.76 0.76 0.76 Tribehenin 0 3.0 0 3.0 3.0 3.0 3.0 Polysilicone-11 12 7.4 4.0 0 4.0 12.0 16.0 SPF In Vitro 78.97 434.15 59.5 49.24 10.97 15.74 12.64 Synergy (yes or no) N / A yes N / A N / A no no no 5

[0090] The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm.” 10   [0091 ] Every document cited herein, including any cross referenced or related patent or application, is hereby incorporated herein by reference in its entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that it is prior art with respect to any invention disclosed or claimed herein or that it alone, or in any combination with any other reference or references, teaches, suggests or discloses any such invention. Further, to 15 the extent that any meaning or definition of a term in this document conflicts with any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.

[0092] While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention. 5

Claims

1. A photoprotective cosmetic composition comprising at least one chemical sunscreen, a sunscreen solubilizing / stabilizing agent, a wax. and a silicone elastomer; wherein the total amount of the at least one chemical sunscreen ranges from about 10% to about 40%, the amount of the sunscreen solubilizing / stabilizing agent ranges from about 1% to about 10% , the w ax is present at a level of greater than 1% and less than 20 wt.%, and the amount of the silicone elastomer ranges from about 0.1% to about 20%, by weight of the total photoprotective cosmetic composition.

2. The photoprotective cosmetic composition of Claim 1, wherein the at least one chemical sunscreen comprises at least on UVA chemical sunscreen and at least one UVB chemical sunscreen.

3. The photoprotective cosmetic composition of Claim 2, wherein the at least one UVA chemical sunscreen comprises Butyl Methoxy dibenzoylmethane.

4. The photoprotective cosmetic composition of Claim 2, wherein at least one UVB chemical sunscreen comprises at least three UVB chemical sunscreens selected from the group consisting of Octocrylene, 4-methylbenzylidene camphor, Octinoxate, Cinoxate, Benzophenone 3, Benzophenone 4, Benzophenone 5, Homosalate, PABA, Ethyl Hexyl Dimethyl PABA, Ethyldihydroxypropyl PABA, Ethylhexyl Salicylate, TEA-Salicylate, DEA-Salicylate, and mixtures thereof.

5. The photoprotective cosmetic composition of Claim 4, wherein the at least three UVB chemical sunscreens comprise Octocrylene, Homosalate, and Ethylhexyl Salicylate.

6. The photoprotective cosmetic composition of Claim 2, wherein the total amount of the at least one UVA chemical sunscreen ranges from about 0.1% to about 8% by weight of the total photoprotective cosmetic composition.

7. The photoprotective cosmetic composition of Claim 2, wherein the total amount of the at least one UVB chemical sunscreen ranges from about 5% to about 40% by weight of the total photoprotective cosmetic composition.

8. The photoprotective cosmetic composition of Claim 1, wherein the sunscreen solubilizing / stabilizing agent is selected from the group consisting of C12-15 Alkyl Benzoate, Butyloctyl Salicylate, PPG-15 Stearyl Ether Benzoate, Dicaprylyl Carbonate, and mixtures thereof.

9. The photoprotective cosmetic composition of Claim 1, wherein the wax is naturally occurring.

10. The photoprotective cosmetic composition of Claim 1, wherein the wax comprises estersderived from glycerin and three fatty acids.

11. The photoprotective cosmetic composition of Claim 1, wherein the silicone elastomer is a crosslinked polymer formed by the reaction of vinyl terminated silicone and hydrogen dimethicone.

12. The photoprotective cosmetic composition of Claim 1, wherein the weight ratio of the silicone elastomer to the wax is from about 10:1 to about 1:10.

13. The photoprotective cosmetic composition of Claim 2, wherein the weight ratio of the wax to the at least one UVA chemical sunscreen is from about 7:1 to about 1:5,14. The photoprotective cosmetic composition of Claim 1, wherein the photoprotective cosmetic composition is anhydrous.