Fluorinated copolymer composition, method for its production, and molded product

A fluorinated copolymer composition comprising the following thermoplastic resin A and the following fluorinated elastomer B, wherein

• the fluorinated elastomer B is dispersed in the thermoplastic resin A,
• the number average particle diameter of the fluorinated elastomer B is from 1 to 300 μm, and
• the volume ratio of the thermoplastic resin A to the fluorinated elastomer B is from 97:3 to 55:45, and
• having a flexural modulus of from 1,000 to 3,700 Mpa,
• wherein the thermoplastic resin A is at least one type of melt-moldable thermoplastic heat-resistant resin selected from the group consisting of a polyarylate, a polyether sulfone, a polyaryl sulfone, an aromatic polyamide, an aromatic polyether amide, an aromatic polyether imide, a polyphenylene sulfide, a polyaryl ether ketone, a polyamideimide and a liquid crystal polyester,
• wherein the fluorinated elastomer B is at least one type of fluorinated elastic copolymer selected from the group consisting of a copolymer having units based on tetrafluoroethylene and units based on propylene, a copolymer having units based on hexafluoropropylene and units based on vinylidene fluoride, and a copolymer having units based on tetrafluoroethylene and units based on a perfluoro(alkyl vinyl ether), and the perfluoro(alkyl vinyl ether) is a compound represented by the following formula (I),
• CF2═CF(ORF) (I)
• wherein RF is a C1-8 linear or branched perfluoroalkyl group and wherein the fluorinated elastomer B has a Mooney viscosity (ML1+10, 121° C.) of from 20 to 200.