Patent ID: 8114391
Filing Date: 2012-02-14
Classification: A61K,A61Q

Abstract:
1. A composition for hair comprising: a block copolymer (A) represented by the following general formula (1): wherein R 1 independently designates univalent hydrocarbon groups free of aliphatic unsaturation; Y 1 designates a bivalent organic group; R 2 independently designates groups represented by the following formula: (wherein Y 2 is a hydrogen atom or a substituted or unsubstituted univalent hydrocarbon group); “a” is 1 or a greater integer; “b1” is 1 or a greater integer; “b2” is 0; “c” is 1 or a greater integer; the average molecular weight of the polyorganosiloxane block represented by formula: is equal to or exceeds 10,500; the polyorganosiloxane block constitutes 50 to 99 mass % of block copolymer (A); the average molecular weight of the polyoxyalkylene block represented by formula: is within the range of 130 to 10,000; and the average molecular weight of block copolymer (A) is equal to or higher than 50,000; and a block copolymer (B) represented by the following general formula (2): wherein R 3 independently designates substituted or unsubstituted univalent hydrocarbon groups (wherein Y 3 , b3, and b4 are defined below, Y 4 designates hydrogen atoms or a substituted or unsubstituted univalent hydrocarbon group); Y 3 designates a bivalent organic group; R 4 independently designates groups represented by the following formula: “a′” is an integer within the range of 1 to 1350; “b3” and “b4” are, respectively, integers within the range of 1 to 220; “c′” is an integer within the range of 1 to 50; the average molecular weight of the polyorganosiloxane block represented by formula: is within the range of 134 to 10,000; the polyorganosiloxane block constitutes 0.7 to 97.5 mass % of block copolymer (B); the average molecular weight of the polyoxyalkylene block represented by formula: is within the range of 130 to 10,000; and the average molecular weight of block copolymer (B) is within the range of 650 to 100,000; wherein each of block copolymer (A) and block copolymer (B) is present in the composition within the range of 0.01 to 10 mass % (per total weight of the composition as a reference).