Patent ID: 7485688

Claim:
A water and oil proofing composition having a fluorocopolymer dispersed in an aqueous media, wherein the fluorocopolymer comprises 60 to 98 mass % of polymerized units based on the following monomer (a), from 1 to 20 mass % of polymerized units based on the following monomer (b) and from 1 to 30 mass % of polymerized units based on the following monomer (c): monomer (a): a compound represented by (Z-Y) n X, wherein Z: a C 1-6 perfluoroalkyl group or a group represented by C m F 2m+1 O(CFWCF 2 O) d CFK— (wherein m is an integer of from 1 to 6, d is an integer of from 1 to 4, and each of W and K is independently a fluorine atom or —CF 3 ), Y: a bivalent organic group or a single bond, n: 1 or 2, and X: a polymerizable unsaturated group provided that when n is 1, X is —CR═CH 2 , —COOCR═CH 2 , —OCOCR═CH 2 , —OCH 2 -φ-CR═CH 2 or —OCH═CH 2 , and when n is 2, X is ═CH(CH 2 ) p CR═CH 2 , ═CH(CH 2 ) p COOCR═CH 2 , ═CH(CH 2 ) p OCOCR═CH 2 or —OCOCH═CHCOO— (wherein R is a hydrogen atom, a methyl group or a halogen atom, φ is a phenylene group, and p is an integer of from 0 to 4), monomer (b): a compound represented by CH 2 ═CR 1 -G-(R 2 O) q —R 3 , wherein R 1 : a hydrogen atom or a methyl group, R 2 : a C 2-4 alkylene group or an otherwise C 2-3 alkylene group in which some or all of the hydrogen atoms have been replaced by hydroxyl groups, q: an integer of from 1 to 50, G: —COO(CH 2 ) r — or —COO(CH 2 ) t —NHCOO— (wherein r is an integer of from 0 to 4, and t is an integer of from 1 to 4), and R 3 is at least one of an acryloyl group and a methacryloyl group, monomer (c): a compound represented by CH 2 ═CR 4 -M-Q-NR 5 R 6 or CH 2 ═CR 4 -M-Q-N(O)R 5 R 6 , wherein R 4 : a hydrogen atom or a methyl group, M: —COO— or —CONH—, Q: a C 2-4 alkylene group or an otherwise C 2-3 alkylene group in which some or all of the hydrogen atoms have been replaced by hydroxyl groups, and each of R 5 and R 6 : a benzyl group, a C 1-8 alkyl group or an otherwise C 2-3 alkylene group in which some of the hydrogen atoms have been replaced by hydroxyl groups, or R 5 and R 6 may form a morpholino group, a piperidino group or a pyrrolidinyl group, together with a nitrogen atom.