Personal care composition containing spherical silicone elastomer fine particles

Abstract

The present disclosure relates to: a personal care composition comprising a cross-linked silicone elastomer; a personal care composition comprising a cross-linked silicone elastomer powder that is free of a surfactant; and a personal care composition free of polyether compounds. The present disclosure further relates to personal care compositions comprising one or more of an oil, an aqueous phase, an opacifier, a film former, a wax, an emulsifier, microparticles, a pigment, a dye, and a preservative.

Description

Technical Field

[0001] The present disclosure relates to personal care compositions comprising crosslinked silicone elastomers. The present disclosure also relates to personal care compositions comprising surfactant-free crosslinked silicone elastomer powders. The present disclosure further relates to personal care compositions free of polyether compounds. Background Art

[0002] Cross-linked silicone elastomers provide luxurious sensory benefits to personal care formulations. These benefits include, but are not limited to, providing a cushioning feel, a matte appearance, and a powdery soft afterfeel. The cross-linked silicone elastomers are often prepared by cross-linking siloxane monomers in the presence of a solvent and shearing the mixture using a high shear mixer to form a smooth gel. See, for example, U.S. Pat. Nos. 4,987,169; 5,654,362; 5,760,116; 6,423,322 and 5,811,487. These cross-linked elastomers often contain catalysts such as platinum or tin because the reaction is carried out in the presence of such catalysts. The morphology or shape of the sheared particles is uneven and difficult to control. JP4860214B describes a method for preparing a cross-linked silicone elastomer having a uniform spherical morphology without using a platinum or tin catalyst. However, these silicone elastomers mentioned in JP4860214B are accompanied by surfactants used during synthesis. In one aspect, these surfactants may be polyether-based surfactants, which are brought into personal care formulations along with the elastomers and may stabilize the personal care formulations. However, polyether compounds and surfactants often irritate the skin. Therefore, there is a need for personal care formulations containing crosslinked silicone elastomers prepared without the use of platinum or tin catalysts and free of polyether compounds. Summary of the invention

[0003] The present disclosure provides a personal care composition comprising a cross-linked silicone elastomer prepared by:

[0004] (1) A crosslinkable siloxane is prepared by reacting:

[0005] (a) an α,ω-dihydroxy poly(diorganosiloxane) having a viscosity (25° C.) of about 5 to about 3000 mPa·s; and

[0006] (b) having the general formula R 1 Si(OR 2 )3 organic trialkoxysilane;

[0007] in:

[0008] R 1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted aryl group, and wherein the substituted alkyl group is a halogen-substituted alkyl group having 1 to 4 carbon atoms;

[0009] R 2 is methyl, ethyl, or 2-methoxyethyl;

[0010] (2) emulsifying the cross-linkable silicone in the presence of a surfactant;

[0011] (3) crosslinking the emulsified silicone;

[0012] The personal care composition is free of polyether compounds.

[0013] The present disclosure also provides a personal care composition comprising a cross-linked silicone elastomer prepared by:

[0014] (1) A crosslinkable siloxane is prepared by reacting:

[0015] (a) an α,ω-dihydroxy poly(diorganosiloxane) having a viscosity (25° C.) of about 5 to about 3000 mPa·s; and

[0016] (b) having the general formula R 1 Si(OR 2 )3 organic trialkoxysilane;

[0017] in:

[0018] R 1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted aryl group, and wherein the substituted alkyl group is a halogen-substituted alkyl group having 1 to 4 carbon atoms;

[0019] R 2 is methyl, ethyl, or 2-methoxyethyl;

[0020] wherein the alkoxy groups of component (b) are from about 1.5 to about 5 per silanol group of component (a);

[0021] (2) emulsifying the cross-linkable silicone in the presence of a surfactant;

[0022] (3) crosslinking the emulsified silicone;

[0023] The personal care composition is free of polyether compounds.

[0024] The present disclosure further provides a personal care composition comprising a cross-linked silicone elastomer powder, the cross-linked silicone elastomer powder being spherical and prepared by:

[0025] (1) A crosslinkable siloxane is prepared by reacting:

[0026] (a) an α,ω-dihydroxy poly(diorganosiloxane) having a viscosity (25° C.) of about 5 to about 3000 mPa·s; and

[0027] (b) having the general formula R 1 Si(OR 2 )3 organic trialkoxysilane;

[0028] in:

[0029] R 1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted aryl group, and wherein the substituted alkyl group is a halogen-substituted alkyl group having 1 to 4 carbon atoms;

[0030] R 2 is methyl, ethyl, or 2-methoxyethyl;

[0031] (2) emulsifying the cross-linkable silicone in the presence of a surfactant;

[0032] (3) cross-linking the emulsified siloxane to form a cross-linked silicone elastomer emulsion; and

[0033] (4) drying the cross-linked silicone elastomer emulsion to separate solid cross-linked silicone elastomer powder;

[0034] The personal care composition is free of polyether compounds.

[0035] The present disclosure further provides a surfactant-free cross-linked silicone elastomer powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings incorporated herein form part of the specification and illustrate embodiments of the present disclosure. Together with the specification, these drawings are further used to explain the principles of the disclosed embodiments and enable those skilled in the relevant art to make and use the disclosed embodiments. The accompanying drawings are intended to be illustrative and not restrictive.

[0037] Figure 1 A sensory panel study for Formulation Examples 2A and 2B is described.

[0038] Figure 2A sensory panel study is described for Formulation Examples 6A, 6B and 6C. DETAILED DESCRIPTION

[0039] As used above, and throughout the specification, unless otherwise indicated, the following terms shall be understood to have the following meanings.

[0040] Unless otherwise indicated, the terms "a", "an", "the" and similar references used in the context of describing particular aspects of the present application (especially in the context of the claims) may be construed to cover both the singular and the plural, unless otherwise indicated. Recitation of ranges of values ​​herein is intended merely to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each separate value is incorporated into the specification as if it were individually recited herein.

[0041] Furthermore, when used herein, "and / or" should be considered as a specific disclosure of each of the two specified features or components (assemblies) with or without the other. Thus, the term "and / or" as used herein in phrases such as "A and / or B" is intended to include "A and B", "A or B", "(alone) A", and "(alone) B". Similarly, the term "and / or" as used in phrases such as "A, B, and / or C" is intended to cover each of the following: A, B, and C; A, B, or C; A or C; A or B; B or C; A and C; A and B; B and C; (alone) A; (alone) B; and (alone) C.

[0042] It is understood that, herein, any aspects described with the language "comprising", other similar aspects described with the language "consisting of" and / or "consisting essentially of" are also provided.

[0043] The term "about" encompasses the range of experimental error that occurs in any measurement.

[0044] As used herein, the term "hydrocarbon" refers to any chemical structure containing hydrogen atoms and carbon atoms.

[0045] The term "alkyl" means any monovalent, saturated straight or branched chain hydrocarbon group; and the term "alkenyl" means any monovalent straight or branched chain hydrocarbon group containing one or more carbon-carbon double bonds, wherein the point of attachment of the group can be at the carbon-carbon double bond or elsewhere therein.

[0046] Representative examples of alkyl include, but are not limited to, methyl, ethyl, propyl, and isobutyl. Examples of alkenyl include, but are not limited to, vinyl, propenyl, allyl, methallyl, ethylidenyl norbornane, ethylidene norbornyl, ethylidenylnorbornene, and ethylidene norbornenyl.

[0047] The term "aryl" includes any aromatic hydrocarbon in which one hydrogen atom has been removed. Specific non-limiting examples of aryl groups include phenyl and naphthyl.

[0048] The term "halo" or "halogen" when used by themselves or as part of another group refers to -Cl, -F, -Br, or -I.

[0049] The term "polyether compound" includes organic molecules / organosilicones having ether groups (mainly polyethylene glycol (PEG) and polypropylene glycol (PPG) ether groups). Examples of polyether compounds include, but are not limited to, polyethylene oxide, polypropylene oxide, polybutylene oxide, polyoxyethylene / polyoxypropylene glycol, polyoxyethylene alkyl ether, polyoxyethylene alkenyl ether, polyoxyethylene alkylphenyl ether, and polyoxyethylene / polyoxypropylene alkyl ether.

[0050] The term "surfactant" includes anionic surfactants, cationic surfactants, nonionic surfactants, and zwitterionic surfactants.

[0051] Anionic surfactants include, but are not limited to, hexylbenzenesulfonic acid, octylbenzenesulfonic acid, decylbenzenesulfonic acid, dodecylbenzenesulfonic acid, cetylbenzenesulfonic acid, myristylbenzenesulfonic acid, lauryl sulfate, polyoxyethylene lauryl sulfate, dodecylsulfonic acid, sulphonic acid, hexadecanesulfonic acid, hydroxydodecanesulfonic acid, hydroxytetradecanesulfonic acid, hydroxyhexadecanesulfonic acid, and their salts.

[0052] Cationic surfactants include, but are not limited to, octyltrimethylammonium hydroxide, lauryltrimethylammonium hydroxide, stearyltrimethylammonium hydroxide, dioctyldimethylammonium hydroxide, distearyldimethylammonium hydroxide, lauryltrimethylammonium chloride, stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, dicocoyldimethylammonium chloride, distearyldimethylammonium chloride, benzalkonium chloride, and stearyldimethylbenzyl ammonium chloride.

[0053] The nonionic surfactants include, but are not limited to, polyoxyethylene lauryl ether, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, sorbitan fatty acid esters, glycerol fatty acid esters, polyoxyethylene hydrogenated castor oil, polyethylene glycol, polypropylene glycol, and diethylene glycol.

[0054] Zwitterionic (amphoteric) surfactants have both a cationic center and an anionic center attached to the same molecule. The cationic portion is based on a primary amine, a secondary amine, or a tertiary amine or a quaternary ammonium cation. The anionic portion can be more variable and include sulfonate, carboxylate, and phosphate. Examples of zwitterionic surfactants include, but are not limited to, CHAPS (3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate), cocamidopropyl hydroxysulfobetaine, cocamidopropyl betaine, phosphatidylethanolamine, phosphatidylcholine, sphingomyelin, lauryl dimethylamine oxide, and myristic amine oxide.

[0055] Other than in the working examples, or where otherwise indicated, all numbers expressing amounts of material, reaction conditions, durations, quantitative properties of materials, and so forth, set forth in the specification and claims are to be understood as being modified in all instances by the term "about".

[0056] It will be understood that any numerical range recited herein includes all sub-ranges of that range and any combination of the various endpoints of such ranges or sub-ranges.

[0057] It will be further understood that any compound, material or substance disclosed explicitly or implicitly in the specification and / or recited in the claims as belonging to a group of structurally, compositionally and / or functionally related compounds, materials or substances includes individual representatives of the group and all combinations thereof.

[0058] The personal care compositions disclosed herein comprise a cross-linked silicone elastomer prepared by:

[0059] (1) A crosslinkable siloxane is prepared by reacting:

[0060] (a) an α,ω-dihydroxy poly(diorganosiloxane) having a viscosity (25° C.) of about 5 to about 3000 mPa·s; and

[0061] (b) having the general formula R 1 Si(OR 2 )3 organic trialkoxysilane;

[0062] in:

[0063] R 1is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted aryl group, and wherein the substituted alkyl group is a halogen-substituted alkyl group having 1 to 4 carbon atoms;

[0064] R 2 is methyl, ethyl, or 2-methoxyethyl;

[0065] (2) emulsifying the cross-linkable silicone in the presence of a surfactant;

[0066] (3) crosslinking the emulsified silicone; and

[0067] The personal care composition is free of polyether compounds.

[0068] The present disclosure also provides a personal care composition comprising a cross-linked silicone elastomer prepared by:

[0069] (1) A crosslinkable siloxane is prepared by reacting:

[0070] (a) an α,ω-dihydroxy poly(diorganosiloxane) having a viscosity (25° C.) of about 5 to about 3000 mPa·s; and

[0071] (b) having the general formula R 1 Si(OR 2 )3 organic trialkoxysilane;

[0072] in:

[0073] R 1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted aryl group, and wherein the substituted alkyl group is a halogen-substituted alkyl group having 1 to 4 carbon atoms;

[0074] R 2 is methyl, ethyl, or 2-methoxyethyl;

[0075] wherein the alkoxy groups of component (b) are from about 1.5 to about 5 per silanol group of component (a);

[0076] (2) emulsifying the cross-linkable silicone in the presence of a surfactant;

[0077] (3) crosslinking the emulsified silicone; and

[0078] The personal care composition is free of polyether compounds.

[0079] The present disclosure further provides a personal care composition comprising a cross-linked silicone elastomer powder, the cross-linked silicone elastomer powder being spherical and prepared by:

[0080] (1) A crosslinkable siloxane is prepared by reacting:

[0081] (a) an α,ω-dihydroxy poly(diorganosiloxane) having a viscosity (25° C.) of about 5 to about 3000 mPa·s; and

[0082] (b) having the general formula R 1 Si(OR 2 )3 organic trialkoxysilane;

[0083] in:

[0084] R 1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted aryl group, and wherein the substituted alkyl group is a halogen-substituted alkyl group having 1 to 4 carbon atoms;

[0085] R 2 is methyl, ethyl, or 2-methoxyethyl;

[0086] (2) emulsifying the cross-linkable silicone in the presence of a surfactant;

[0087] (3) cross-linking the emulsified siloxane to form a cross-linked silicone elastomer emulsion; and

[0088] (4) drying the cross-linked silicone elastomer emulsion to separate solid cross-linked silicone elastomer powder;

[0089] The personal care composition is free of polyether compounds.

[0090] In one aspect, the cross-linked silicone elastomer powder is spherical.

[0091] In another aspect, the cross-linked silicone elastomer powder is free of surfactant.

[0092] In some aspects, the personal care compositions described above are free of polyether compounds.

[0093] I. Condensation reaction

[0094] (1) α,ω-dihydroxy poly(diorganosiloxane)

[0095] In some aspects, the α,ω-dihydroxy poly(diorganosiloxane) has the general formula HO[(R 3 )2SiO] p H.

[0096] In some aspects, each R 3 are independently a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted aryl group.

[0097] In some aspects, each R 3 is independently a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms. 3 is independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms. In some aspects, the alkyl group is methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, or decyl. In some aspects, each R 3 It is methyl.

[0098] In some aspects, each R 3 is independently a substituted alkyl group, wherein the substituted alkyl group is a halogen-substituted alkyl group. In some aspects, the halogen-substituted alkyl group is 3-chloropropyl or 3,3,3-trifluoropropyl.

[0099] In some aspects, each R 3 is independently a substituted or unsubstituted alkenyl group having 2 to 8 carbon atoms. 3 is independently a substituted or unsubstituted alkenyl group having 2 to 4 carbon atoms. In some aspects, the alkenyl group is a vinyl group or an allyl group.

[0100] In some aspects, each R 3 is independently a substituted or unsubstituted aryl group. 3 is a substituted aryl group which is a phenyl group substituted by an alkyl group having 1 to 4 carbon atoms.

[0101] In some aspects, when each R 3 When is methyl, the α,ω-dihydroxy poly(diorganosiloxane) is α,ω-dihydroxy poly(dimethylsiloxane).

[0102] In some aspects, p is a value such that the viscosity (25° C.) of the α,ω-dihydroxy poly(diorganosiloxane) is from about 5 to about 3000 mPa·s.

[0103] In some aspects, the α,ω-dihydroxy poly(diorganosiloxane) has a viscosity (25° C.) of about 5 to about 3000 mPa·s, about 5 to about 2900 mPa·s, about 5 to about 2800 mPa·s, about 5 to about 2700 mPa·s, about 5 to about 2600 mPa·s, about 5 to about 2500 mPa·s, about 5 to about 2400 mPa·s, about 5 to about 2300 mPa·s, about 5 to about 2200 mPa·s, about 5 to about 2100 mPa·s, about 10 to about 2000 mPa·s, about 10 to about 1900 mPa·s, about 10 to about 1800 mPa·s, about 10 to about 1700 mPa·s, about 10 to about 1600 mPa·s, about 10 to about 1500 mPa·s, about 10 to about 1 s, about 15 to about 400 mPa·s, about 10 to about 1300 mPa·s, about 10 to about 1200 mPa·s, about 10 to about 1100 mPa·s, about 15 to about 1000 mPa·s, about 15 to about 900 mPa·s, about 15 to about 800 mPa·s, about 15 to about 700 mPa·s, about 15 to about 600 mPa·s, about 15 to about 500 mPa·s, about 15 to about 400 mPa·s, about 15 to about 300 mPa·s, about 15 to about 200 mPa·s, about 15 to about 100 mPa·s, about 20 to about 90 mPa·s, about 20 to about 80 mPa·s, about 20 to about 70 mPa·s, about 20 to about 60 mPa·s, about 20 to about 50 mPa·s, or about 20 to about 40 mPa·s.

[0104] (2) Organic trialkoxysilane

[0105] In some aspects, the organotrialkoxysilane has the general formula R 1 Si(OR 2 )3.

[0106] In some aspects, R 1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group or a substituted or unsubstituted aryl group.

[0107] In some aspects, R 1 is a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms. 1 is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms. In some aspects, the alkyl group is methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, or decyl. In some aspects, R 1 It is methyl.

[0108] In some aspects, R 1is a substituted alkyl group, wherein the substituted alkyl group is a halogen-substituted alkyl group. In some aspects, the halogen-substituted alkyl group is 3-chloropropyl or 3,3,3-trifluoropropyl.

[0109] In some aspects, R 1 is a substituted or unsubstituted alkenyl group having 2 to 8 carbon atoms. 1 is a substituted or unsubstituted alkenyl group having 2 to 4 carbon atoms. In some aspects, the alkenyl group is a vinyl group or an allyl group.

[0110] In some aspects, R 1 is a substituted or unsubstituted aryl group. 1 is a substituted aryl group, wherein the substituted aryl group is a phenyl group substituted by an alkyl group having 1 to 4 carbon atoms. 1 It is phenyl.

[0111] In some aspects, each R 2 is independently a substituted or unsubstituted alkyl group.

[0112] In some aspects, each R 2 is independently a substituted alkyl group, the substituted alkyl group being an alkoxy substituted alkyl group. In some aspects, the alkoxy substituted alkyl group is 2-methoxyethyl, 2-ethoxyethyl, 2-propoxyethyl, or 2-butoxyethyl.

[0113] In some aspects, each R 2 is independently an unsubstituted alkyl group, wherein the unsubstituted alkyl group is methyl, ethyl, propyl, butyl, pentyl or hexyl. 2 In some aspects, each R 2 In some aspects, each R 2 It is propyl.

[0114] In some aspects, the organotrialkoxysilane is methyltrimethoxysilane, methyltriethoxysilane, methyltri-n-propoxysilane, phenyltrimethoxysilane, or phenyltriethoxysilane.

[0115] In some aspects, the alkoxy group (—OR 2 ) is the silanol group (-(R 3 )2SiO-), from about 1.5 to about 5 per silanol group of component (a), from about 2 to about 4.5 per silanol group of component (a), from about 2.5 to about 4 per silanol group of component (a), or from about 3 to about 3.5 per silanol group of component (a).

[0116] (3) Catalyst used in the condensation reaction

[0117] The present disclosure further provides that the condensation reaction between component (a) and component (b) is carried out using a catalyst. Examples of catalysts for the condensation reaction include amines, ammonium salts, ammonium hydroxides, Hydroxides, and combinations thereof.

[0118] Examples of amines as catalysts for the condensation reaction include, but are not limited to, monomethylamine, dimethylamine, monoethylamine, diethylamine, ethylenediamine, hexamethylenetetramine, and silanolate compounds thereof including α-aminopropyltriethoxysilane.

[0119] Examples of ammonium salts as catalysts for the condensation reaction include, but are not limited to, (1-butyl)triethylammonium bromide, (1-decyl)trimethylammonium bromide, (1-dodecyl)trimethylammonium bromide, (1-dodecyl)trimethylammonium chloride, benzalkonium chloride, and silanol compounds thereof including trimethyl[3-(triethoxysilyl)propyl]ammonium chloride.

[0120] Examples of ammonium hydroxides as catalysts for the condensation reaction include, but are not limited to, tetramethylammonium hydroxide, dimethylbenzylammonium hydroxide, and silanol compounds thereof including trimethyl[3-(triethoxysilyl)propyl]ammonium hydroxide.

[0121] As a catalyst for condensation reactions Examples of hydroxides include, but are not limited to, tetramethyl hydroxide Tetrabutyl Hydroxide Phenyltrimethylol hydroxide Methoxytetramethyl (tetramethylphosphoniummethoxide), butoxytetrabutyl (tetrabutylphosphonium butoxide), butyl tricyclohexyl hydroxide and silanol compounds thereof including trimethyl[3-(triethoxysilyl)propyl]hydroxide

[0122] In some aspects, the catalyst for the condensation reaction is ammonium hydroxide or a silanol compound thereof. In some aspects, the catalyst for the condensation reaction is tetramethylammonium hydroxide. In some aspects, the catalyst for the condensation reaction is Hydroxide or silanol compound thereof.

[0123] In some aspects, the amount of catalyst used in the condensation reaction is from about 0.001 to about 0.1 parts by weight, from about 0.002 to about 0.09 parts by weight, from about 0.003 to about 0.08 parts by weight, from about 0.004 to about 0.07 parts by weight, from about 0.005 to about 0.06 parts by weight, from about 0.006 to about 0.05 parts by weight, from about 0.007 to about 0.04 parts by weight, from about 0.008 to about 0.03 parts by weight, from about 0.009 to about 0.02 parts by weight, or from about 0.01 to about 0.02 parts by weight, relative to about 100 parts by weight of the total amount of component (a) and component (b).

[0124] (4) Cross-linkable siloxane

[0125] In some aspects, the crosslinkable siloxane has a viscosity (25° C.) of about 5 to about 10,000 mPa·s, about 6 to about 9,000 mPa·s, about 7 to about 8,000 mPa·s, about 8 to about 7,000 mPa·s, about 9 to about 6,000 mPa·s, or about 10 to about 5,000 mPa·s.

[0126] In addition, in order to control the fluidity of the crosslinkable polyorganosiloxane and improve the mechanical strength of the obtained crosslinked silicone elastomer fine particles, a filler may be added to the crosslinkable polyorganosiloxane as an optional component. Such fillers include, but are not limited to, reinforcing fillers such as precipitated silica, fumed silica, pyrogenic silica, fumed titanium oxide, ground quartz, and diatomaceous earth, non-reinforcing fillers such as aluminosilicate, iron oxide, zinc oxide, and calcium carbonate, and fillers obtained by treating these surfaces with organic silicon compounds such as hexamethylsilazane, trimethylchlorosilane, polydimethylsiloxane, and polymethylhydrogensiloxane.

[0127] II. Emulsification process

[0128] In some aspects, one or more surfactants are added to the reaction product of component (a) and component (b) to form an emulsion. In some aspects, the one or more surfactants are selected from anionic surfactants, cationic surfactants, nonionic surfactants, zwitterionic surfactants, and combinations thereof.

[0129] Examples of anionic surfactants include, but are not limited to, hexylbenzenesulfonic acid, octylbenzenesulfonic acid, tetradecenesulfonic acid, hexadecylsulfonic acid, hydroxydodecanesulfonic acid, hydroxytetradecanesulfonic acid, lauryl sulfate, lauryl polyoxyethylene ether sulfate, and salts thereof.

[0130] Examples of cationic surfactants include, but are not limited to, octyltrimethylammonium hydroxide, lauryltrimethylammonium hydroxide, stearyltrimethylammonium hydroxide, lauryltrimethylammonium chloride, stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, benzalkonium chloride, and stearyldimethylbenzylammonium chloride.

[0131] Examples of the nonionic surfactant include, but are not limited to, polyoxyethylene lauryl ether, polyoxyethylene fatty acid esters, polyoxyethylene sorbitan fatty acid esters, sorbitan fatty acid esters, polyoxyethylene hydrogenated castor oil, polyethylene glycol, polypropylene glycol, and diethylene glycol.

[0132] Examples of zwitterionic (amphoteric) surfactants include, but are not limited to, CHAPS (3-[(3-cholamidopropyl)dimethylammonio]-1-propanesulfonate), cocamidopropyl hydroxysultaine, cocamidopropyl betaine, phosphatidylcholine, lauryl dimethylamine oxide, and myristicamine oxide.

[0133] In some aspects, the surfactant is sodium lauryl sulfate.

[0134] In some aspects, the surfactant is sodium laureth sulfate.

[0135] In some aspects, the total amount of surfactant used is in an amount of about 0.05 to about 50 parts by weight, about 0.06 to about 40 parts by weight, about 0.07 to about 30 parts by weight, about 0.08 to about 20 parts by weight, about 0.09 to about 10 parts by weight, about 0.1 to about 10 parts by weight, about 0.2 to about 9 parts by weight, about 0.3 to about 8 parts by weight, about 0.4 to about 7 parts by weight, about 0.5 to about 6 parts by weight, about 0.6 to about 5 parts by weight, about 0.7 to about 4 parts by weight, about 0.8 to about 3 parts by weight, about 0.9 to about 2 parts by weight, or about 1 to about 1.5 parts by weight, based on about 100 parts by weight of the cross-linkable polyorganosiloxane.

[0136] III. Cross-linking reaction

[0137] In some aspects, one or more acids are added to the emulsion as a catalyst to crosslink the reaction product of component (a) and component (b) to form a crosslinked silicone elastomer.

[0138] In some aspects, the one or more acids include an inorganic acid, an organic acid, or a combination thereof.

[0139] Examples of inorganic acids include, but are not limited to, hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, and aminosulfonic acid. Examples of organic acids include, but are not limited to, formic acid, citric acid, acetic acid, and p-toluenesulfonic acid.

[0140] In some aspects, the amount of these acids used is from about 0.05 to about 10 parts by weight, from about 0.1 to about 10 parts by weight, from about 0.5 to about 9.5 parts by weight, from about 1 to about 9.5 parts by weight, from about 1.5 to about 9 parts by weight, from about 2 to about 9 parts by weight, from about 2.5 to about 8.5 parts by weight, from about 3 to about 8.5 parts by weight, from about 3.5 to about 8 parts by weight, from about 4 to about 8 parts by weight, from about 4.5 to about 7.5 parts by weight, or from about 5 to about 7 parts by weight, based on about 100 parts by weight of the cross-linkable polyorganosiloxane.

[0141] IV. Drying the Cross-linked Silicone Elastomer

[0142] In some aspects, one or more salts are added to separate the cross-linked silicone elastomer from the emulsion. In some aspects, isopropanol is added to separate the cross-linked silicone elastomer from the emulsion. In some aspects, the salt is calcium chloride. In some aspects, the amount of salt used is from about 0.01 to about 1 part by weight, from about 0.05 to about 0.9 part by weight, from about 0.1 to about 0.8 part by weight, from about 0.2 to about 0.7 part by weight, from about 0.3 to about 0.6 part by weight, or from about 0.4 to about 0.5 part by weight relative to about 100 parts by weight of the emulsion. In some aspects, the amount of isopropyl alcohol used is about 5 to about 20 parts by weight, about 6 to about 20 parts by weight, about 7 to about 19 parts by weight, about 8 to about 19 parts by weight, about 9 to about 18 parts by weight, about 10 to about 18 parts by weight, about 11 to about 17 parts by weight, about 12 to about 17 parts by weight, about 13 to about 16 parts by weight, or about 14 to about 16 parts by weight relative to about 100 parts by weight of the emulsion. In some aspects, the cross-linked silicone elastomer is filtered and dried to form a cross-linked silicone elastomer powder. In some aspects, the cross-linked silicone elastomer powder does not contain a surfactant.

[0143] V. Ingredients in Personal Care Compositions

[0144] In one aspect, the personal care composition comprises a cross-linked silicone elastomer. In another aspect, the personal care composition comprises a cross-linked silicone elastomer powder.

[0145] In some aspects, the personal care composition further comprises one or more volatile and non-volatile oils selected from hydrocarbons, silicones, fluorinated oils, and combinations thereof.

[0146] In some aspects, the oil is selected from dimethicone, caprylyl methicone, phenyl-modified silicone, alkanes of 7 to 17 carbon atoms, fatty acid esters, and combinations thereof. In some aspects, the alkane is linear or branched nonane, linear or branched decane, linear or branched undecane, linear or branched dodecane, linear or branched tridecane, linear or branched isododecane, linear or branched squalene, linear or branched hemi-squalane, or combinations thereof.

[0147] In some aspects, the personal care composition further comprises an aqueous phase. In some aspects, the aqueous phase comprises one or more of water, glycerin, butylene glycol, propylene glycol, xanthan gum, steareth 21, sodium polyacrylate, disodium EDTA, and sodium chloride.

[0148] In some aspects, the personal care composition further comprises one or more organic or inorganic sunscreens. In some aspects, the sunscreen is selected from titanium dioxide, zinc oxide, oxybenzone, ethylhexyl salicylate, homosalate, avobenzone, octocrylene, and combinations thereof.

[0149] In some aspects, the personal care composition further comprises one or more film formers. In some aspects, the one or more film formers are silicone resins selected from MQ resins, MT resins, T-propyl resins, and combinations thereof. In some aspects, the one or more film formers are selected from acrylate / polytrimethylsiloxy-methacrylate copolymers, acrylate / polydimethylsiloxane copolymers, vinyl pyrrolidone / eicosene copolymers, styrene / acrylate copolymers, and combinations thereof.

[0150] In some aspects, the personal care composition further comprises one or more waxes. In some aspects, the wax is selected from C 30-45 Alkyl polydimethylsiloxane, C 30-45 Alkyl cetearyl dimethicone crosspolymer, beeswax, ozokerite, carnauba wax, shea butter, stearic acid, cetyl alcohol, and combinations thereof.

[0151] In some aspects, the personal care composition further comprises one or more emulsifiers. In some aspects, the one or more emulsifiers are polyglyceryl-4 diisostearate / polyhydroxystearate / sebacate.

[0152] In some aspects, the personal care composition further comprises one or more of particulate, pigment and dye. In some aspects, the particulate is selected from silicon dioxide, talc, aluminum starch octenyl succinate, polymethylsilsesquioxane, nylon-12, starch particles including tapioca starch and rice starch, cellulose particles, cellulose acetate particles, titanium dioxide, boron nitride, mica, organically modified hectorite clay, and combinations thereof. In some aspects, the pigment is iron oxide or lake pigment. In some aspects, the dye is Phoxine B.

[0153] In some aspects, the personal care composition further comprises one or more preservatives. In some aspects, the preservative is phenoxyethanol.

[0154] In some aspects, the personal care composition is a deodorant, an antiperspirant, a skin cream, a face cream, a shampoo, a conditioner, a mousse, a hair styling gel, a hair spray, a barrier cream, a lipstick, a lip gloss, a facial foundation, a blush, a makeup, a mascara, a skin lotion, a moisturizer, a facial treatment, an eye serum, an eye cream, a personal cleanser, a facial cleanser, a bath oil, a perfume, a shaving cream, a pre-shave lotion, an after-shave lotion, a cologne, a sachet, a loose facial powder, a pressed powder, an eye shadow, and a sunscreen.

[0155] Example 1

[0156] Preparation of Emulsion 1

[0157] Preparation of reactive oil: 427 parts of α,ω-dihydroxy poly(dimethylsiloxane) having a viscosity of 85mPa·s and 42 parts of methyltriethoxysilane were charged into a 500mL flask equipped with a reflux stirrer. The reactants were stirred and mixed. The temperature was raised to 100°C. While stirring, 0.015 parts of a 30% aqueous solution of tetramethylammonium hydroxide were added as a catalyst. When the reaction lasted for 5 hours, the ethanol produced by the condensation reaction was brought to a reflux state, and the temperature in the flask became 94°C. Thereafter, the temperature was raised to 140°C and the reaction was continued for 2 hours to remove the produced ethanol and decompose the catalyst tetramethylammonium hydroxide. Subsequently, under heating at 140°C and a reduced pressure of 2.6kPa, compounds with a low boiling point were removed. After 3 hours, the reaction was cooled to room temperature to obtain 445 parts of a reactive oil having a viscosity of 470mPa·s.

[0158] Preparation of emulsion of silicone elastomer particles:4.2 parts of sodium lauryl sulfate are dissolved in 90 parts of ion exchange water. Then, 300 parts of reactive oil are added and stirred for 5 minutes. Then, while continuing to stir, 150 parts of ion exchange water are added dropwise within 5 minutes. The mixture is then uniformly emulsified with a colloid mill. Then, the obtained emulsion is transferred to a flask, and 6 parts of 20% sulfuric acid are added under stirring. The reaction is continued at 50°C for 17 hours under stirring. Cool to 30°C under stirring, and then stop the reaction by adding triethanolamine dropwise until the pH reaches 7. An aqueous dispersion of fine particles of silicone elastomer is obtained (hereinafter referred to as "emulsion 1"). The volume average particle size of the cross-linked silicone elastomer in emulsion 1 is 5.7μm.

[0159] Example 2

[0160] Preparation of emulsion 2

[0161] Preparation of reactive oil: 314 parts of α,ω-dihydroxy poly(dimethylsiloxane) having a viscosity of 30 mPa·s and 146 parts of methyltriethoxysilane were charged into a 500 mL flask equipped with a reflux stirrer. The reactants were stirred and mixed. The temperature was raised to 100°C. While stirring, 0.015 parts of a 30% aqueous solution of tetramethylammonium hydroxide were added as a catalyst. When the reaction lasted for 4 hours, the ethanol produced by the condensation reaction was brought to a reflux state, and the temperature in the flask became 87°C. Then, the temperature was raised to 140°C and the reaction was continued for 2 hours to remove the produced ethanol and decompose the catalyst tetramethylammonium hydroxide. Thereafter, under heating at 140°C and a reduced pressure of 2.6 kPa, compounds with a low boiling point were removed. After 3 hours, the reaction was cooled to room temperature to obtain 348 parts of a reactive oil having a viscosity of 104 mPa·s.

[0162] Preparation of silicone elastomer particle emulsion: 1.2 parts of sodium polyoxyethylene lauryl ether sulfate were dissolved in 90 parts of ion exchange water. Then, 300 parts of reactive oil were added and stirred for 5 minutes. Then, while continuing to stir, 150 parts of ion exchange water were added dropwise within 5 minutes. The mixture was then uniformly emulsified with a colloid mill. Then, the obtained emulsion was transferred to a flask, and 6 parts of 20% sulfuric acid were added under stirring. The reaction was continued at 50°C for 20 hours under stirring. Then, during stirring, a solution prepared by mixing 10% sodium carbonate solution and 30% sodium polyoxyethylene lauryl ether sulfate solution in a weight ratio of 1:1 was added dropwise to the reaction until the pH reached 7. An aqueous dispersion of silicone elastomer fine particles (hereinafter referred to as "emulsion 2") was obtained. The volume average particle size of the cross-linked silicone elastomer in emulsion 2 was 7.4 μm.

[0163] Example 3

[0164] Preparation of Dried Cross-linked Silicone Elastomer Powder 1

[0165] 100g of Emulsion 2 was charged into a 4-necked flask with an overhead stirrer, a thermocouple, a nitrogen line, and a condenser. The emulsion was stirred at 200rpm at room temperature. 2g of 10 wt% CaCl2 solution and 15g of isopropanol were then added to the flask. After stirring for 1 hour, the mixture was filtered and the residue was washed with 100g of deionized water at 50°C. The washing step was repeated three times to remove residual impurities. The silicone elastomer residue was then dried under vacuum at 100°C to obtain a silicone elastomer in the form of a white powder. The solids % of the powder was measured by placing 1g of the sample in a convection oven at 150°C. The residual surfactant was measured by UV / Vis spectroscopy. Table 1 lists the analysis of the product.

[0166] Table 1

[0167]

[0168] Example 4

[0169] Preparation of Dried Cross-linked Silicone Elastomer Powder 2

[0170] 100 kg of emulsion 2 and 2 kg of 10 wt % CaCl2 solution were charged into a kettle. The emulsion was stirred at room temperature for 30 minutes and left for 12 hours without stirring. The emulsion was then stirred again. After 30 minutes, the contents were filtered through a centrifuge and the residue was washed with 100 kg of water while centrifuging, leaving a wet cake with 76% solids. The wet cake was dried in a rotary dryer at 110°C for 24 hours and further dried at 120°C for 12 hours. Table 1 lists the analysis of the dried powder.

[0171] Example 5

[0172] Preparation of Dried Cross-linked Silicone Elastomer Powder 3

[0173] The emulsion of the invention can be dried to a powder by spray drying. 100 kg of emulsion 2 were dried by spray drying using a 1.0 mm two-fluid nozzle with nitrogen and at a pressure of 2.0 bar. The inlet temperature of the gas was 225° C. The feed rate was 1.9 kg / hour based on the dried powder. Table 1 lists the analysis of the dried powder.

[0174] Example 6

[0175] Preparation of Dried Cross-linked Silicone Elastomer Powder 4

[0176] 360 kg of emulsion 2 and 7.2 kg of 10 wt % CaCl2 solution were charged into the kettle. The emulsion was stirred for 30 minutes and left for 12 hours without stirring. The emulsion was then stirred again. After 30 minutes, the contents were filtered through a centrifuge and the residue was washed with 900 kg of water while centrifuging, leaving a wet cake with 88% solids. The wet cake was dried in a box dryer at 105°C for 22 hours, with 1.5 kg of wet cake in each tray. Table 1 lists the analysis of the dried powder.

[0177] Example 7

[0178] Preparation of Personal Care Formulation 1

[0179] Table 2 lists the ingredients of Personal Care Formulation 1 (water-in-oil skin primer). The procedure for preparing Personal Care Formulation 1 is as follows. The ingredients of phase A are combined with a dispersant. The mixture is stirred at 70°C for 20 minutes until it is uniform. The ingredients of phase B are combined with a dispersant. The mixture is stirred at 70°C until it is uniform. Then phase B is added to phase A. The mixture is stirred at 70°C until it is uniform. The ingredients of phase C are combined with a dispersant. The mixture is stirred at 70°C until it is uniform. Then phase C is slowly added to phases A and B at 70°C while stirring at 300 rpm. The mixture is stirred at 300 rpm and 70°C for 20 minutes to emulsify. The emulsion is then cooled to room temperature. Then, phase D is added to the emulsion. The emulsion is stirred at 300 rpm for 10 minutes or at 2000 rpm for 3 minutes until it is uniform.

[0180] Table 2

[0181]

[0182] Example 8

[0183] Preparation of Personal Care Formulation 2

[0184] Table 3 lists the ingredients of Personal Care Formulation 2 (Silicone-in-Water Foundation). The procedure for preparing Personal Care Formulation 2 is as follows. The ingredients of Phase A are combined with a dispersant. The mixture is stirred at 70°C until it is uniform. The ingredients of Phase B are combined with a dispersant. The mixture is stirred at 70°C until it is uniform. Phase B is then added to Phase A. The mixture is stirred at 70°C for 30 minutes until it is uniform. The ingredients of Phase C are combined with a dispersant. The mixture is stirred at 70°C until it is uniform. Phase C is then slowly added to Phases A and B at 70°C while stirring at 300 rpm. The mixture is stirred at 300 rpm and 70°C for 20 minutes to emulsify. The emulsion is then cooled to room temperature. Phase D is then added to the emulsion. The emulsion is stirred at 2000 rpm for 5 minutes until it is uniform.

[0185] Figure 1 A sensory panel study of Formulation Examples 2A and 2B is shown. In this study, Formulation Example 2A showed better spreadability, skin adhesion, smoothness, and lower stickiness compared to the benchmark Formulation Example 2B.

[0186] Table 3

[0187]

[0188] Example 9

[0189] Preparation of Personal Care Formulation 3

[0190] Table 4 lists the ingredients of Personal Care Formulation 3 (Oil-in-water sunscreen SPF10). The procedure for preparing Personal Care Formulation 3 is as follows. The ingredients of Phase B are combined and mixed at 70°C until the mixture is uniform. The ingredients of Phase C are combined and mixed at 70°C until the mixture is uniform. While stirring at 70°C, Phase B is added to Phase C. The mixture is stirred at 70°C until it is uniform. The ingredients of Phase A are combined and mixed at 50°C until the mixture is uniform. Then, while stirring at 50°C, the mixture of Phase B and Phase C is added to Phase A. The mixture is stirred at 50°C until it is uniform. The mixture is then cooled to 40°C. Then, Phase D is added to the mixture. The mixture is stirred at 11,000 rpm for 1 minute until it is uniform.

[0191] Table 4

[0192]

[0193] Example 10

[0194] Preparation of Personal Care Formulation 4

[0195] Table 5 lists the ingredients of Personal Care Formulation 4 (anhydrous sunscreen). The procedure for preparing Personal Care Formulation 4 is as follows. The ingredients of Phase A were mixed at room temperature. The ingredients of Phase B were added to Phase A and homogenized at 6000 rpm for 5 minutes at room temperature.

[0196] Table 5

[0197]

[0198] Embodiment 11

[0199] Preparation of Personal Care Formulation 5

[0200] Table 6 lists the ingredients of Personal Care Formulation 5 (Lipstick). The procedure for preparing Personal Care Formulation 5 is as follows. The ingredients of Phase A are combined and mixed at 70°C until the mixture is uniform. The ingredients of Phase B are combined and mixed at 70°C until the mixture is uniform. Phase B is then added to Phase A while stirring. The mixture is stirred at 70°C until it is uniform. The mixture is then cooled to room temperature.

[0201] Table 6

[0202]

[0203] Example 12

[0204] Preparation of Personal Care Formulation 6

[0205] Table 7 lists the ingredients of Personal Care Formulation 6 (Ultra Smooth Skin Purifying Facial Serum). The procedure for preparing Personal Care Formulation 6 is as follows. The ingredients of Phase B are combined and mixed at 70°C until the mixture is uniform. The ingredients of Phase C are combined and mixed at 70°C until the mixture is uniform. While stirring at 70°C, Phase B is added to Phase C. The mixture is stirred at 70°C until it is uniform. The ingredients of Phase A are combined and mixed at 50°C until the mixture is uniform. Then, while stirring at 50°C, the mixture of Phase B and Phase C is added to Phase A. The mixture is stirred at 50°C until it is uniform. The mixture is then cooled to 40°C. Then, Phase D is added to the mixture. The mixture is stirred until it is uniform. The mixture is then cooled to room temperature.

[0206] Figure 2 A sensory panel study of Formulation Examples 6A, 6B and 6C is shown. In this study, Formulation Example 6A showed better spreadability, cushiony feel and moisturized feel compared to the benchmark Formulation Examples 6B and 6C.

[0207] Table 7

[0208]

Claims

1. A personal care composition comprising a cross-linked silicone elastomer prepared by: (1) A crosslinkable siloxane is prepared by reacting: (a) an α,ω-dihydroxy poly(diorganosiloxane) having a viscosity of about 5 to about 3000 mPa·s (25° C.); and (b) having the general formula R 1 Si(OR 2 )3 organic trialkoxysilane; in: R 1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted aryl group, and wherein the substituted alkyl group is a halogen-substituted alkyl group having 1 to 4 carbon atoms; R 2 is methyl, ethyl, or 2-methoxyethyl; (2) emulsifying the cross-linkable silicone in the presence of a surfactant; as well as (3) cross-linking the emulsified silicone; The personal care composition is free of polyether compounds.

2. The personal care composition of claim 1, wherein the personal care composition further comprises one or more volatile and non-volatile oils selected from hydrocarbons, silicones, fluorinated oils, and combinations thereof.

3. The personal care composition of claim 2, wherein the oil is selected from the group consisting of dimethicone, caprylyl methicone, phenyl-modified silicone, alkanes of 7 to 17 carbon atoms, fatty acid esters, and combinations thereof.

4. The personal care composition of claim 3, wherein the alkane is linear or branched nonane, linear or branched decane, linear or branched undecane, linear or branched dodecane, linear or branched tridecane, linear or branched isododecane, linear or branched squalene, linear or branched hemi-squalane, or a combination thereof.

5. The personal care composition of claim 1, wherein the personal care composition further comprises an aqueous phase.

6. The personal care composition of claim 5, wherein the aqueous phase comprises one or more of water, glycerin, butylene glycol, propylene glycol, xanthan gum, steareth 21, sodium polyacrylate, disodium EDTA, and sodium chloride.

7. The personal care composition of claim 1, wherein the personal care composition further comprises one or more organic or inorganic sunscreens.

8. The personal care composition of claim 7, wherein the sunscreen is selected from the group consisting of titanium dioxide, zinc oxide, oxybenzone, ethylhexyl salicylate, homosalate, avobenzone, octocrylene, and combinations thereof.

9. The personal care composition of claim 1, wherein the personal care composition further comprises one or more film formers.

10. The personal care composition of claim 9, wherein the one or more film formers are silicone resins selected from the group consisting of MQ resins, MT resins, T-propyl resins, and combinations thereof.

11. The personal care composition of claim 9, wherein the one or more film formers are selected from the group consisting of acrylates / polytrimethylsiloxy-methacrylate copolymers, acrylates / polydimethylsiloxane copolymers, vinyl pyrrolidone / eicosene copolymers, styrene / acrylate copolymers, and combinations thereof.

12. The personal care composition of claim 1, wherein the personal care composition further comprises one or more waxes.

13. The personal care composition of claim 12, wherein the wax is selected from C 30-45 Alkyl polydimethylsiloxane, C 30-45 Alkyl cetearyl dimethicone crosspolymer, beeswax, ozokerite, carnauba wax, shea butter, stearic acid, cetyl alcohol, and combinations thereof.

14. The personal care composition of claim 1, wherein the personal care composition further comprises one or more emulsifiers.

15. The personal care composition of claim 1, wherein the personal care composition further comprises one or more of microparticles, pigments, and dyes.

16. The personal care composition of claim 15, wherein the microparticles are selected from the group consisting of silica, talc, aluminum starch octenylsuccinate, polymethylsilsesquioxane, nylon-12, starch particles including tapioca starch and rice starch, cellulose particles, cellulose acetate particles, titanium dioxide, boron nitride, mica, organomodified hectorite clay, and combinations thereof.

17. The personal care composition of claim 1, wherein the personal care composition further comprises one or more preservatives.

18. The personal care composition of claim 1, wherein the personal care composition is a deodorant, an antiperspirant, a skin cream, a face cream, a shampoo, a conditioner, a mousse, a hair styling gel, a hair spray, a barrier cream, a lipstick, a lip gloss, a facial foundation, a blush, a makeup, and a mascara, a skin lotion, a moisturizer, a facial treatment, an eye serum, an eye cream, a personal cleanser, a facial cleanser, a bath oil, a perfume, a shaving cream, a pre-shave lotion, an after-shave lotion, a cologne, a sachet, a loose facial powder, a pressed powder, an eye shadow, or a sunscreen.

19. A personal care composition comprising a cross-linked silicone elastomer powder, the cross-linked silicone elastomer powder being spherical and prepared by: (1) A crosslinkable siloxane is prepared by reacting: (a) an α,ω-dihydroxy poly(diorganosiloxane) having a viscosity of about 5 to about 3000 mPa·s (25° C.); and (b) having the general formula R 1 Si(OR 2 )3 organic trialkoxysilane; in: R 1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted aryl group, and wherein the substituted alkyl group is a halogen-substituted alkyl group having 1 to 4 carbon atoms; R 2 is methyl, ethyl, or 2-methoxyethyl; (2) emulsifying the cross-linkable silicone in the presence of a surfactant; (3) cross-linking the emulsified siloxane to form a cross-linked silicone elastomer emulsion; as well as (4) drying the cross-linked silicone elastomer emulsion to separate solid cross-linked silicone elastomer powder; The personal care composition is free of polyether compounds.

20. The personal care composition of claim 19, wherein the cross-linked elastomeric powder is free of surfactant.

21. A personal care composition comprising a cross-linked silicone elastomer prepared by: (1) A crosslinkable siloxane is prepared by reacting: (a) an α,ω-dihydroxy poly(diorganosiloxane) having a viscosity of about 5 to about 3000 mPa·s (25° C.); and (b) having the general formula R 1 Si(OR 2 )3 organic trialkoxysilane; in: R 1 is a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, or a substituted or unsubstituted aryl group, and wherein the substituted alkyl group is a halogen-substituted alkyl group having 1 to 4 carbon atoms; R 2 is methyl, ethyl, or 2-methoxyethyl; wherein the alkoxy groups of component (b) are from about 1.5 to about 5 per silanol group of component (a); (2) emulsifying the cross-linkable silicone in the presence of a surfactant; and (3) crosslinking the emulsified silicone; The personal care composition is free of polyether compounds.

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