Patent ID: 8283480

Claim:
A perfluoropolyether group-containing acrylate compound represented by the following formula (1): X 1 —[Z—Rf—Z—X 2 ] v —Z—Rf—Z—X 1 (1) wherein Rf is a divalent perfluoropolyether group with a molecular weight of from 500 to 30000, optionally having branched structure; X 1 is, independently of each other, a group represented by the following formula (2): wherein a and c are an integer of from 0 to 4; b is an integer of from 1 to 4, provided that a total of a, b and c is 2, 3 or 4; R 1 is, independently of each other, a group represented by the following formula (3), —(C 4 H 8 O) d (C 3 H 6 O) e (C 2 H 4 O) f (CH 2 O) g R 3 (3) wherein d, e, f and g are, independently of each other, an integer of from 0 to 20, provided that a molecular weight of R 1 is in a range of 30 to 600; the repeating units may be sequenced at random; and R 3 is a saturated or unsaturated hydrocarbon residue having 1 to 10 carbon atoms; R 2 is an acryl group- or alpha-substituted acryl group-containing group represented by the following formula (4): wherein R 4 is, independently of each other, a hydrogen atom, a fluorine atom, a methyl group or a trifluoromethyl group; R 5 is a divalent or trivalent linking group having 1 to 18 carbon atoms, optionally having an ether bond and/or ester bond; and n is an integer of 1 or 2; Q 1 and Q 2 may be same with or different from each other and are a divalent linking group with 3 to 20 carbon atoms, optionally having an ether bond, an ester bond, an amide bond or a urethane bond and optionally having cyclic or branched structure; X 2 is, independently of each other, a group represented by the following formula (5) wherein R 1 , R 2 , Q 1 and Q 2 are as defined above; h, i and j are an integer of from 0 to 3, provided that a total of h, i and j is an integer of from 1 to 3; and the repeating units may be sequenced at random; Z is a divalent organic group, optionally containing an oxygen atom, a nitrogen atom or a fluorine atom and unsaturated bond, and optionally having cyclic structure; and v is an integer of from 0 to 5.