Patent ID: 6716944
Filing Date: 2004-04-06
Classification: C09K

Abstract:
A water and oil repellent composition comprising a copolymer consisting essentially of polymerized units of the following monomer (a) and polymerized units of the following monomer (b):monomer (a): a monomer having a polyfluoroalkyl group, wherein the melting point of fine crystals derived from the polyfluoroalkyl groups in a homopolymer of said monomer, does not exist or is at most 50Â° C., monomer (b): a monomer having an organic group other than a polyfluoroalkyl group, (wherein the melting point of fine crystals derived from the organic groups in a homopolymer of said monomer, is at least 30Â° C., wherein the monomer (a) is a compound represented by the formula (Zâ€”Y)nX, wherein the symbols in the formula have the following meanings: Z: a perfluoroalkyl group having a number of carbon atoms of at most 6, or a group represented by the formula CmF2m+1O(CF2CF(CF3)O)dCF(CF3)â€”, wherein m is an integer of from 1 to 6, and d is an integer of from 1 to 4, Y: a bivalent organic group or a single bond, X: a polymerizable unsaturated group, which is â€”CR&boxH;CH2, â€”C(O)OCR&boxH;CH2, â€”OC(O)CR&boxH;CH2, -or â€”OCH&boxH;CH2 when n is 1, and is &boxH;CH(CH2)qCR&boxH;CH2, &boxH;CH(CH2)qC(O)OCR&boxH;CH2, &boxH;CH(CH2)qOC(O)CR&boxH;CH2 or â€”OC(O)CH&boxH;CHC(O)Oâ€” when n is 2, provided that R is a hydrogen atom, a methyl group or a halogen atom, &phgr; is a phenylene group and q is an integer from 0 to 4.