| abstract |
[Problem] To provide a polyester resin composition having excellent flexibility at room temperature and improved brittleness, and also having excellent wet heat durability and flame retardancy. Provided is a copolyester resin composition suitable for molding applications such as electronic parts and potting processing applications. An acid component contains an aromatic dicarboxylic acid and a dimer acid, a glycol component contains 1,4-butanediol and polybutadiene glycols, and the content of the dimer acid in the acid component is 10. Copolymer in which the content of 1,4-butanediol in the glycol component is 50 mol% or more and the content of polybutadiene glycol in the glycol component is 0.5 to 20 mol% A copolymerized polyester resin composition comprising a polyester resin (A), a brominated aromatic compound (B), and an antimony oxide compound (C). [Selection figure] None |