Delivery of hydrophobic benefit agents from bodywashes and the like onto a keratinous substrate
First Claim
1. A cosmetically acceptable delivery system for hydrophobic benefit agents to a keratinous substrate wherein the delivery system comprisesi.) an amphiphilic block copolymer,which amphiphilic block copolymer comprises a hydrophilic (A) block and a hydrophobic (B) block,wherein the hydrophilic block (A) comprises at least a cationic monomer unit or a potentially cationic monomer unit in the conditions of use and the unit is represented by formulae (I) or (II) wherein R1 is hydrogen or methyl, R2 is hydrogen, a branched or unbranched C1-4 alkyl, R3 and/or R4 are independently branched or unbranched C1-22 alkyl, C1-C4 alkylhydroxy, benzyl or R3 and R4 can be combined to form a five or six membered ring with the nitrogen, said ring containing one or more hetero atoms, Z−
- is the conjugate base of an acid, X is oxygen or —
NR5, wherein R5 is as defined in R1 above, A is an alkylene group of 1 to 4 carbons, R6 and R7 are hydrogen, branched or unbranched C1-22 alkyl, benzyl or C1-C4 alkylhydroxy, n and m are 2, 3, 4 or greater;
and the hydrophobic polymeric block (B) comprises siloxane monomer units, and ii.) a hydrophobic benefit agent.
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Accused Products
Abstract
This invention relates to a delivery system for hydrophobic benefit agents to keratinous substrates. The delivery system comprises amphiphilic block copolymers, and a hydrophobic benefit agent, which amphiphilic block copolymers comprise a siloxane segment and a cationic segment. The invention also relates to methods of delivering the hydrophobic benefit agents to the keratinous substrate. Furthermore, the delivery systems and methods of delivery are effective in retaining an hydrophobic benefit agents on the keratinous substrate after rinsing.
More particularly, the delivery systems are especially suitable in personal cleansing, body wash or rinse off lotion compositions and comprise certain amphiphilic polymers which effectively deposit the hydrophobic benefit agents onto a keratinous substrate, such as skin or hair.
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Citations
18 Claims
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1. A cosmetically acceptable delivery system for hydrophobic benefit agents to a keratinous substrate wherein the delivery system comprises
i.) an amphiphilic block copolymer, which amphiphilic block copolymer comprises a hydrophilic (A) block and a hydrophobic (B) block, wherein the hydrophilic block (A) comprises at least a cationic monomer unit or a potentially cationic monomer unit in the conditions of use and the unit is represented by formulae (I) or (II) wherein R1 is hydrogen or methyl, R2 is hydrogen, a branched or unbranched C1-4 alkyl, R3 and/or R4 are independently branched or unbranched C1-22 alkyl, C1-C4 alkylhydroxy, benzyl or R3 and R4 can be combined to form a five or six membered ring with the nitrogen, said ring containing one or more hetero atoms, Z− - is the conjugate base of an acid,
X is oxygen or —
NR5,wherein R5 is as defined in R1 above, A is an alkylene group of 1 to 4 carbons, R6 and R7 are hydrogen, branched or unbranched C1-22 alkyl, benzyl or C1-C4 alkylhydroxy, n and m are 2, 3, 4 or greater; and the hydrophobic polymeric block (B) comprises siloxane monomer units, and ii.) a hydrophobic benefit agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- is the conjugate base of an acid,
Specification