Patent ID: 8507580

Claim:
An antifouling composition comprising: 100 parts by mass of a fluorocopolymer (A) comprising from 30 to 59 mass % of polymerized units of a monomer (a) and from 40 to 70 mass % of polymerized units of a monomer (b), and from 10 to 30 parts by mass of a surfactant (c), wherein the surfactant (c) comprises at least one compound represented by formula (I): wherein each of x1 and x2 is an integer of at least 1, and (x1+x2) is at least 2 and at most 30, and the average of (x1+x2) per one molecule in the surfactant (c) is at least 6; wherein the monomer (a) is a monomer having a polyfluoroalkyl group in which the number of carbon atoms to which fluorine atoms are bonded is from 4 to 6 provided that the polyfluoroalkyl group may comprise an etheric oxygen atom; and wherein the monomer (b) comprises a monomer (b3) represented by formula (4): CH 2 ═CR 6 -G 2 -(C 2 H 4 O) q2 —(C 4 H 8 O) q3 —R 7 (4) wherein each of R 6 and R 7 which are independent of each other, is a hydrogen atom or a methyl group, q2 is an integer of 0 or from 1 to 50, q3 is an integer of from 1 to 50, G 2 is —COO(CH 2 ) r2 — or —COO(CH 2 ) t2 —NHCOO—, wherein r2 is an integer of from 0 to 4, and t2 is an integer of from 1 to 4.