Patent ID: 7470753

Claim:
ε-Polylysine represented by the following formula (1), having a polyorganosiloxane group introduced into the molecule (a polymer hereinafter referred to as “silicone-modified ε-polylysine”) wherein B 1 , B 2 and B 3 are groups represented by general formula (2) below or amino groups, and at least one thereof is a group represented by formula (2), c is an integer of 0 to 50, d is an integer of 0 to 50, and c+d is an integer of 1 to 50 —D—Y—Q (2) wherein D is a group represented by: (wherein R 11 is C1-5 linear or branched alkylene, C2-5 alkenylene or C6-10 arylene), and Y is C1-1000 linear or branched alkylene, of which any mutually non-adjacent methylenes may be substituted with —O—, and Q is a polyorganosiloxane group represented by the following formula (3): wherein each R 1 is independently C1-20 alkyl or C6-10 aryl, a is an integer of 0 to 1000, b is an integer of 0 to 1000, a+b is an integer of 1 to 1000, and A 11 , A 21 and A 31 are independently R 1 , or a monovalent residue which is a compound represented by formula (1) with Q removed, with one thereof being said monovalent residue.