# US 7,744,857 B2 · Antiperspirant compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,744,857 B2 - Document ID: US7744857B2 - Status: Granted - Kind: B2 - Application number: 10/775,510 - Filed: 2004-02-10 - Published: 2004-09-23 - Granted: 2010-06-29 - Earliest claimed: 2003-02-11 - Assignees: Unilever Home & Personal Care USA, Division of Conopco, Inc. - Inventors: Denise Marie Beachy; Kevin Ronald Franklin - Web page: https://patentgrep.com/patent/US7744857B2 ## CPC - A61K 8/585: {Organosilicon compounds} - A61K 8/26: Aluminium; Compounds thereof - A61Q 15/00: Anti-perspirants or body deodorants (deodorisation of air A61L9/00) - A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D) - A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS ## Abstract Antiperspirant compositions containing suspended antiperspirant actives in a water-immiscible carrier leave visible deposits on skin or clothing unless the actives are masked. The carrier mixture in compositions herein comprise an alkylsiloxane which is substituted by a group R4 of formula —CH2—C(Ph) (RB)—R5-Ph in which RB represents H or methyl and R5 represents an alkylene group containing 0 to 3 carbons, and in which the proportion of aryl carbon atoms is at least 60% of all carbon atoms in the molecule. Preferably, the substituent comprises diphenylethyl. Optionally, the siloxane can be capped by the residue of a substituted vinyl group other than R4 or an alkyl, cycloalkyl or aralkyl alcohol. ## Claims ### Claim 1 An anhydrous antiperspirant composition comprising a) from 0.5 to 50% by weight of a particulate aluminium and/or aluminium/zirconium antiperspirant active; b) from 30 to 95% by weight of a water-immiscible carrier fluid or mixture of carrier fluids; and c) from 0.1 to 40% by weight of a thickener, gellant or structurant for the carrier fluid; in which the carrier fluid comprises an aryl substituted siloxane which satisfies the general formula 1 R1RA2Si—O—[—SiR2RA—O]n—SiR3RA2 in which: n represents an average number of from 0 to 2; R1 R2 and R3, which may be the same as or different from each other, each represents R4 or a capping group RC, wherein: R4 represents diphenylethyl, and RC represents a residue of α-methylstyrene dimer, benzyl alcohol or allyloxy ethanol, with the proviso that not more than 20% of the total occurrences of —R1, R2 and R3 are RC, and RA represents a methyl group; and wherein at least 30% by weight of the carrier fluid or mixture of carrier fluids is the aryl substituted siloxane, and wherein the anhydrous antiperspirant composition is in the form of a cream, soft solid or stick. ### Claim 2 (depends on 1) A composition according to claim 1 in which R4 represent a mixture of diphenylethyl and the hydrogenated residue of x-methylstyrene dimer. ### Claim 3 (depends on 1) A composition according to claim 1 wherein RC is the residue of α-methylstyrene dimer. ### Claim 4 (depends on 1) A composition according to claim 1 in which RC represents a residue of benzyl alcohol or allyloxy ethanol. ### Claim 5 (depends on 1) A composition according to claim 1 at least 85% of the total occurrences of R1, R2, and R3 are diphenylethyl. ### Claim 6 (depends on 1) A composition according to claim 1 in which n is from 0 to 1.5. ### Claim 7 (depends on 1) A composition according to claim 1 in which n is 0. ### Claim 8 (depends on 4) A composition according to claim 4 in which the proportion of diphenylethyl group is from 85 to 90%. ### Claim 9 (depends on 1) A composition according to claim 1 in which R4 represents the residue of α-methylstyrene dimer. ### Claim 10 (depends on 9) A composition according to claim 9 in which n in the formula is 1+/−0.2. ### Claim 11 (depends on 1) A composition according to claim 1 in which at least 50% by weight of the carrier fluid or mixture of carrier fluids is the aryl substituted siloxane. ### Claim 12 (depends on 11) A composition according to claim 11 in which from 60 to 90% by weight of the mixture of carrier fluids is the aryl substituted siloxane. ### Claim 13 (depends on 1) A composition according to claim 1 in which the mixture of carrier fluids comprises one or more water-immiscible fluids selected from volatile polycyclomethicone or linear polymethicone oils, non-volatile polymethicone oils, liquid branched aliphatic alcohol, liquid alkyl benzoate esters and liquid polyalkylene glycol ethers. ### Claim 14 (depends on 13) A composition according to claim 13 in which the mixture of carrier fluids comprises the aryl substituted siloxane fluid and the liquid branched aliphatic alcohol in a weight ratio of from 6:1 to 2:1. ### Claim 15 (depends on 1) A composition according to claim 1 in which the carrier fluid and suspended antiperspirant active have refractive index matching within 0.005 units. ### Claim 16 (depends on 1) A composition according to claim 1 in which the antiperspirant active is selected from aluminium chlorohydrate or activated aluminium chlorohydrate. ### Claim 17 (depends on 1) A composition according to claim 1 in which the antiperspirant active is selected from aluminium/zirconium chlorohydrate and complexes of aluminium/zirconium chlorohydrate with an amino acid. ### Claim 18 (depends on 17) A composition according to claim 17 in which the antiperspirant active is a complex of aluminium/zirconium chlorohydrate and glycine. ### Claim 19 (depends on 1) A composition according to claim 1 in which the carrier fluid is thickened or solidified with an effective amount of a structurant comprising a silicone-oil-soluble polymeric gellant or non-polymeric fibre-forming gellant. ### Claim 20 (depends on 19) A composition according to claim 19 in which the polymeric gellant comprises a polyalkylene, a polyalkylene/polyarylene block copolymer a polyamide or a polyamide/polysiloxane copolymer. ### Claim 21 (depends on 19) A composition according to claim 19 in which the non-polymeric fibre-forming gellant is selected from cellobiose esters, lanosterol, a combination of a sterol and a sterol ester, hydroxystearic acid, N-acyl amino acid amides and esters, diamido derivatives of cyclohexane, amido derivatives of aliphatic di or tri-carboxylic acids, and cyclic derivatives of aspartame. ### Claim 22 (depends on 1) A composition according to claim 1 in which the proportion of structurant is selected in the range of from 2 to 15% by weight. ### Claim 23 (depends on 1) A composition according to claim 1 in which the composition is in the form of a stick that has a hardness of greater than 0.5 N/mm2 by sphere indentation.