Personal care composition containing spherical silicone elastomer fine particles

1. A personal care composition comprising a crosslinked silicone elastomer prepared by

(1) preparing crosslinkable siloxane by reacting

(a) α, ω-dihydroxypoly(diorganosiloxane) having a viscosity of about 5 to about 3000 mPa·s (25° C.); and

(b) organotrialkoxysilane with a general formula R 1 Si(OR 2 ) 3 ;

wherein:

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 halogen substituted alkyl group with 1 to 4 carbon atoms;

R 2 is methyl, ethyl, or 2-methoxyethyl;

(2) emulsifying the crosslinkable siloxane in the presence of a surfactant; and

(3) crosslinking the emulsified siloxane;

wherein the personal care composition is free of a polyether compound.

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 the group consisting of hydrocarbon, silicone, fluorinated oils, and combinations thereof.

3. The personal care composition of claim 2 , wherein the oils are selected from the group consisting of dimethicone, caprylyl methicone, phenyl modified silicone, alkanes from 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 hemisqualane, or combinations 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, propanediol, 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 sunscreens are 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 former is a silicone resin selected from the group consisting of MQ resin, MT resin, T-propyl resin, and combinations thereof.

11. The personal care composition of claim 9 , wherein the one or more film former is selected from the group consisting of acrylates/polytrimethylsiloxy-methacrylate copolymer, acrylates/dimethicone copolymer, vinylpyrrolidone/eicosene copolymer, styrene/acrylates copolymer, 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 the group consisting of C 30-45 alkyl dimethicone, C 30-45 alkyl cetearyl dimethicone crosspolymer, beeswax, ozokerite wax, 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 particulates, pigments and dyes.

16. The personal care composition of claim 15 , wherein the particulates 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, organo-modified 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 facial cream, a hair shampoo, a hair conditioner, a mousse, a hair styling gel, a hair spray, a protective cream, a lipstick, a lip color, a facial foundation, blushes, makeup, a mascara, a skin care lotion, a moisturizer, a facial treatment, eye serum, 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, loose facial powder, compact powder, eye shadow, or a sunscreen.

19. A personal care composition comprising a crosslinked silicone elastomer powder that is spherical and prepared by

(1) preparing crosslinkable siloxane by reacting

(a) α, ω-dihydroxypoly(diorganosiloxane) having a viscosity of about 5 to about 3000 mPa·s (25° C.); and

(b) organotrialkoxysilane with a general formula R 1 Si(OR 2 ) 3 ;

wherein:

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 halogen substituted alkyl group with 1 to 4 carbon atoms;

R 2 is methyl, ethyl, or 2-methoxyethyl;

(2) emulsifying the crosslinkable siloxane in the presence of a surfactant;

(3) crosslinking the emulsified siloxane to form crosslinked silicone elastomer emulsion; and

(4) drying the crosslinked silicone elastomer emulsion to isolate solid crosslinked silicone elastomer powder;

wherein the personal care composition is free of a polyether compound.

20. The personal care composition of claim 19 , wherein the crosslinked elastomer powder is free of surfactant.

21. A personal care composition comprising a crosslinked silicone elastomer prepared by

(1) preparing crosslinkable siloxane by reacting

(a) α, ω-dihydroxypoly(diorganosiloxane) having a viscosity of about 5 to about 3000 mPa·s (25° C.); and

(b) organotrialkoxysilane with a general formula R 1 Si(OR 2 ) 3 ;

wherein:

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 halogen substituted alkyl group with 1 to 4 carbon atoms;

R 2 is methyl, ethyl, or 2-methoxyethyl;

wherein the alkoxyl group of component (b) is about 1.5 to about 5 per silanol groups of component (a);

(2) emulsifying the crosslinkable siloxane in the presence of a surfactant; and

(3) crosslinking the emulsified siloxane;

wherein the personal care composition is free of a polyether compound.