Patent ID: 6503632
Filing Date: 2003-01-07
Classification: A61K,A61L,A61Q,C08G,Y10T

Abstract:
A polydialkylsiloxane/polyamide copolymer obtained by polymerizing:an amino compound represented by formula (I) having amino groups at both ends and a dialkylsiloxane chain: H2Nâ€”R1â€”(Si(R2)(R3)â€”O)n1â€”Si(R2)(R3)â€”R1â€”NH2â€ƒâ€ƒ(1) wherein R1 represents a divalent organic group having 1 to 10 carbon atoms, R2 and R3 are the same or different, each representing an organic group having 1 to 7 carbon atoms, and n1 denotes an integer of 5 to 200, a diamino compound represented by formula (2): H2Nâ€”A1â€”NH2â€ƒâ€ƒ(2) wherein A1 represents a divalent organic group having 1 to 20 carbon atoms, and a dicarboxylic acid chloride represented by the formula (3): ClCOâ€”Bâ€”COClâ€ƒâ€ƒ(3) wherein B represents a divalent organic group having 1 to 20 carbon atoms; to form a polydialkylsiloxane/polyamide copolymer (A) containing amino groups at the ends thereof and having a ratio of â€”R1â€”(Si(R2)(R3)â€”O)n1â€”Si(R2)(R3)â€”R1 to A1 within the range of 1:0.01Ëœ100; and subsequently reacting the copolymer (A) with an acyl chloride having 2 to 8 carbon atoms.