Oil- and water-repellent copolymers

摘要

Oil- and water-repellent solid fluoropolymers are disclosed, comprising by weight: (a) 40-75% polymer chain units derived from a mixture of perfluoroalkylethylacrylate monomers of formula CF3CF2(CF2)kC2H4OC(O)CH=CH2, the monomer mixture consisting essentially of: (1) 0-10% monomer wherein k is 4 or less; (2) 45-75% monomer wherein k is 6; (3) 20-40% monomer wherein k is 8; (4) 1-20% monomer wherein k is 10; and (5) 0-5% monomer wherein k is 12; (b) 10-35% polymer chain units derived from vinylidene chloride; and (c) 10-25% polymer chain units derived from an alkyl acrylate or alkyl methacrylate having an alkyl chain length of 2-18 carbons.