Elastic fluorohydrocarbon resin-based polymer blend with graft copolymers of rubbers

摘要

The invention provides a fluorine-containing resin blend. This resin blend includes 100 parts by weight of a first resin and 1-50 parts by weight of a second resin. The first resin is one of an elastic fluorohydrocarbon resin and a vinylidene fluoride based resin. The second resin is a graft copolymer prepared by graft copolymerization of a rubber-like polymer with a first monomer and an optional second monomer. The first monomer is at least one of an acrylic ester and a methacrylic acid ester. The optional second monomer is at least one copolymerizable monomer other than the first monomer. When the elastic fluorohydrocarbon resin is used as the first resin, the resin blend is improved in extensibility upon molding in a melted condition and lowered in modulus of elasticity under a condition that the resin blend is strained by up to 20%, without impairing the elastic fluorohydrocarbon in its heat resistance, low-temperature characteristics and the like. When the vinylidene fluoride based resin is used as the first resin, the resin blend is improved in mechanical strength at low temperature, without impairing superior characteristics of the vinylidene fluoride based resin.