Patent ID: 7875692

Claim:
A polysiloxane having repeating units a and b represented by the following formula (5): wherein R 1 , R 2 , and R 3 , independently of each other, denote an alkyl group or perfluoroalkyl group having 1-22 carbon atoms, an alkoxysilyl group having 1-6 carbon atoms via an alkylene group having 1-6 carbon atoms, a phenyl group, or hydroxyl group, n denotes an integer 1-22; and a and b denote constituent units of the polysiloxane, wherein said polysiloxane is obtained by introducing a phosphorylcholine group represented by the following formula (1): to some or all of the amino groups of the amino-modified polysiloxane having repeating units a and b represented by the following formula (2): wherein R 1 , R 2 , and R 3 , independently of each other, denote an alkyl group or perfluoroalkyl group having 1-22 carbon atoms, an alkoxysilyl group having 1-6 carbon atoms via an alkylene group having 1-6 carbon atoms, a phenyl group, or hydroxyl group, n denotes an integer 1-22, and a and b denote constituent units of the polysiloxane.