A polyester resin composition, a polyester injection molded article, a polyester extrusion molded article, a polyester foam, a polyester container, a polyester bottle, a polyester tableware, and a polyester nursing bottle

摘要

A polyester resin composition comprising 97.0 mass % or more and 99.9 mass % or less of a polyester resin (A) and 0.1 mass % or more and 3.0 mass % or less of polycarbodiimide (B), wherein dicarboxylic acid in the polyester resin (A) The structural unit contains a terephthalic acid unit and/or a 2,6-naphthalenedicarboxylic acid unit, and 5 mol% or more and 90 mol% or less of the diol structural unit in the polyester resin (A) is represented by the following formula (1) or A unit derived from a diol having a cyclic acetal skeleton represented by the formula (2), and 0 mol% or more and 90 mol% or less of the diol structural unit is a unit derived from an alicyclic diol, and the polycarbodiol The polyester resin composition in which the mid (B) has two or more carbodiimide groups in a molecule|numerator. (In formula (1), R 1 and R 2 each independently represent an aliphatic group having 1 to 10 carbon atoms, an alicyclic group having 3 to 10 carbon atoms, or an aromatic group having 6 to 10 carbon atoms.) (Formula ( In 2), R 1 is the same as above, and R 3 represents an aliphatic group having 1 to 10 carbon atoms, an alicyclic group having 3 to 10 carbon atoms, or an aromatic group having 6 to 10 carbon atoms.)