| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester resin composition which excels in injection molding high cycling properties and has dimensional properties for continuous use of a mold, hydrolysis resistance of a necessary property as a connector, and good toughness. SOLUTION: The polyester resin composition comprises (A) 100 pts. wt. polybutylene terephthalate resin having a Ti content of 30-110 ppm in terms of weight which is obtained by continuously subjecting a dicarboxylic acid component having terephthalic acid as the main component and a diol having 1,4-butanediol as the main component to esterification reaction in one or a plurality of esterification reaction vessels and then conducting continuous polycondensation reaction, (B) 0.0001-0.01 pt. wt. nucleating agent, (C) 0.05-1.0 pt. wt. phosphite compound having only one group represented by formula 1 in the molecule and all groups adjacent to O of aromatic groups, and (D) 0.05-3.0 pts. wt. release agent, and has a cooling down crystallization temperature of 190-196°C. COPYRIGHT: (C)2006,JPO&NCIPI
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