| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a polyester resin composition excellent in heat resistance and hydrolysis resistance.SOLUTION: A polyester resin composition is formed by copolymerizing a diol component represented by the formula (I): HOHC-A-CHOH (in the formula, A represents arylene group which may be substituted) in a range of 5 mol% or more and 85 mol% or less on the basis of the mole numbers of the total acid component. A molar ratio between a residual amount M of a metal element and a residual amount P of a phosphorus element satisfies a relationship of the formula (II): 0.5≤M/P≤1.5M=(M+M/2)M(in the formula, Mrepresents bivalent metal, and Mrepresents univalent metal residue), and a melting point is 260°C or lower.</p> |
