Thermoplastic resin composition comprising a fluororesin and a crosslinked fluoroelastomer and method for producing the same

A thermoplastic resin composition comprising a fluororesin (A) and a crosslinked fluoroelastomer (B),

• wherein the fluororesin (A) is a copolymer that contains a chlorotrifluoroethylene unit and a tetrafluoroethylene unit and that has at least one functional group selected from the group consisting of a carbonyl group, an olefinic group and an amino group at a main chain terminal or side chain terminal of the polymer, and
• wherein the crosslinked fluoroelastomer (B) is obtained by subjecting a fluoroelastomer (b) to a dynamic crosslinking treatment along with a polyamine compound (c) having a thermal decomposition temperature of 210° C. or higher and a crosslinking accelerator (d) in the presence of the fluororesin (A) under conditions for melting the fluororesin (A),
• the crosslinking accelerator (d) is a quaternary ammonium salt,
• the amount of the polyamine compound (c) is 0.5 to 15 parts by mass based on 100 parts by mass of the fluoroelastomer (b), and
• the amount of the crosslinking accelerator (d) to be compounded is preferably 0.01 to 10 parts by mass based on 100 parts by mass of the fluoroelastomer (b).