Patent ID: 8304571

Claim:
A perfluoropolyether-modified polysiloxane represented by general formula (1): wherein X is a divalent group represented by formula —CH 2 —, —CH 2 O—, —CH 2 OCH 2 — or —Y—NR—CO—, wherein Y is a divalent group represented by formula —CH 2 — or the following formula: and R is a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or an aryl group; R 1 , R 2 , and R 3 are, independently of each other, an alkyl group having 1 to 10 carbon atoms or an aryl group; X′ is a divalent group represented by formula —CH 2 —, —OCH 2 —, —CH 2 OCH 2 — or —CO—NR—Y′—, wherein Y′ is a divalent group represented by formula —CH 2 — or the following formula: and R is as defined above; a is, independently of each other, 0 or 1; z and z′ are, independently of each other, an integer of 5 to 100; and Rf is a divalent group represented by the following general formula (2): —C t F 2t [OCF 2 CF(CF 3 )] m OCF 2 (CF 2 ) r CF 2 O[CF(CF 3 )CF 2 O] n C t F 2t — (2) wherein m and n are integer of 1 to 150, provided that an average of a total of m and n is 2 to 200; r is an integer of 0 to 6; t is 2 or 3; and C t F 2t is linear or branched; or by the following general formula (3): —C t′ F 2t′ (OCF 2 CF 2 ) u (OCF 2 ) v OC t′ F 2t′ — (3) wherein u is an integer of 1 to 200; v is an integer of 1 to 50; t′ is an integer of 1 to 3; and C t′ F 2t′ is linear or branched.