Cool and dry soft solid antiperspirant

Abstract

A stable, high efficacy, low residue surfactant-free, soft solid cosmetic composition (especially an antiperspirant and/or deodorant) comprising: (a) 40-75 weight % of a volatile silicone; (b) 0.5-20 weight % of a non-emulsifying silicone elastomer; (c) 0.1-10 weight % of a of a superabsorbent powder with little or no tack upon wetting; (d) 0.01-0.5 weight % of a cooling agent selected from the group consisting of L-menthol; menthyl lactate; menthone glycerine; menthone glycerin acetal; (−)-isopulegol, N-ethyl-5-methyl-2-(1-methylethyl)-cyclohexanecarboxamide; N-ethyl-p-menthane-3-carboxzamide; 4-methyl-3-(1-pyrrolidinyl)-2[5H]-furanone; N,2,3-trimethyl-2-isopropylbutanamide; menthoxypropanediol; methanediol; and vanillyl butyl ether; (e) 0-20 weight % of an emollient or a mixture of two or more emollients; (f) 0-30 weight % of an antiperspirant active based on an anhydrous, buffer-free antiperspirant active; (g) 0-8 weight % of polyethylene beads having a particle size in the range of 5-40 microns and a density in the range of 0.91-0.98 g/cm 3 ; (h) 0-5 weight % fragrance; 0) 0-5 weight % of an antimicrobial agent; wherein the ratio of cooling agent to superabsorbent polymer is in the range of 1:50-1:2.

We claim:  
     
         1 . A stable, surfactant-free, soft solid cosmetic composition comprising: 
 (a) 40-75 weight % of a volatile silicone;    (b) 0.5-20 weight % of a non-emulsifying silicone elastomer (on a solids basis);    (c) 0.1-10 weight % of a of a superabsorbent powder with little or no tack upon wetting;    (d) 0.01-0.5 weight % of a cooling agent selected from the group consisting of L-menthol; menthyl lactate; menthone glycerine; menthone glycerin acetal; (−)-isopulegol, N-ethyl-5-methyl-2-(1-methylethyl)- cyclohexanecarboxamide; N-ethyl-p-menthane-3-carboxzamide; 4-methyl-3-(1-pyrrolidinyl)-2[5H]-furanone; N,2,3-trimethyl-2-isopropylbutanamide; menthoxypropanediol; methanediol; and vanillyl butyl ether;    (e) 0-20 weight % of an emollient or a mixture of two or more emollients;    (f) 0-30 weight % of an antiperspirant active based on an anhydrous, buffer-free antiperspirant active;    (g) 0-8 weight % of polyethylene beads having a particle size in the range of 5-40 microns and a density in the range of 0.91-0.98 g/cm 3 ;    (h) 0-5 weight % fragrance; and    (i) 0-5 weight % of an antimicrobial agent;    wherein the ratio of cooling agent to superabsorbent polymer is in the range of 1:50-1:2.    
     
     
         2 . A cosmetic composition as claimed in  claim 1  which comprises 10-25 weight percent of the antiperspirant salt.  
     
     
         3 . A cosmetic composition as claimed in  claim 2  wherein the antiperspirant salt has a low metal to chloride ratio in the range of 0.9-1.2:1.  
     
     
         4 . A cosmetic composition as claimed in  claim 1  which comprises 2-8 weight % of the polyethylene beads.  
     
     
         5 . A cosmetic composition as claimed in  claim 1  which comprises 1-10 weight % of the emollient.  
     
     
         6 . A cosmetic composition as claimed in  claim 1  which comprises 1-15 weight % (on a solids basis) of a non-emulsifying silicone elastomer.  
     
     
         7 . A cosmetic composition as claimed in  claim 1  which comprises 46-53 weight % of a volatile silicone.  
     
     
         8 . A cosmetic composition as claimed in  claim 1  wherein the water lock superabsorbent polymer is a starch graft homopolymers and copolymers of poly(2-propenamide-co-2-propenioic acid) sodium salt.