US 2012/0269747 A1 · Novel Organopolysiloxane Copolymer

Abstract

A novel organopolysiloxane copolymer is disclosed. The copolymer has excellent surface active power and exhibits excellent blending stability in cosmetic preparations and excellent feeling improvement characteristics in comparison to conventionally known polyether-modified silicones and silicone-containing alternating copolymers. The organopolysiloxane copolymer can be used in combination with various cosmetic formulation ingredients. The copolymer is an AB-type organopolysiloxane copolymer which has a silylalkyl group having a carbosiloxane dendrimer structure at one end of the molecular chain, and a hydrophilic segment at the other end. A method for producing the AB-type organopolysiloxane copolymer; a surfactant and a powder processing agent which are respectively composed of the organopolysiloxane copolymer; and a composition for external application and a cosmetic formulation which respectively contain the organopolysiloxane copolymer are also disclosed.

Claims15

Dependent claims

An organopolysiloxane copolymer expressed by the following general formula (1):

wherein R1 independently represents an aryl group or an alkyl group having from 1 to 10 carbons, L1 is a silyl alkyl group expressed by the following general formula (2) when i=1, Q is a hydrophilic segment, and n is a number in a range of 0 to 10;
wherein R1 is synonymous with the group described above, R2 is a phenyl group or an alkyl group having from 1 to 6 carbons, Z is a divalent organic group;
i represents a generation of the silylalkyl group represented by Li, and is an integer of 1 to c when c is a number of generations that is a number of repetitions of the silylalkyl group, the number of generations c is an integer from 1 to 10, and Li+1 is the silylalkyl group when i is less than c and is a methyl group or a phenyl group when i=c;
and ai is a number in a range of 0 to 3.

1 more element

Dependencies are inferred from the claim text.

Novel Organopolysiloxane Copolymer

Life of this patent

Novel Organopolysiloxane Copolymer

Life of this patent

Abstract

Claims15