| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thermoplastic resin composition by which the amount of a gas component generated from a molded article is extremely reduced, and which simultaneously satisfies the whole of mechanical properties such as impact strength, abrasion resistance, and moldability. <P>SOLUTION: The thermoplastic polyester resin composition comprises 50-100 pts.wt. of an aromatic polyester resin (A) obtained from an aromatic dicarboxylic acid having a naphthalene ring or an ester-forming derivative thereof, and an aliphatic diol consisting essentially of 1,4-butanediol, and having ≤300 of a molecular weight, and 0-50 pts.wt. of a polyester block copolymer (B) comprising 70-95 wt.% of a hard segment (a) obtained from an aromatic dicarboxylic acid having the naphthalene ring or an ester-forming derivative thereof, and an aliphatic diol consisting essentially of the 1,4-butanediol and having ≤300 of the molecular weight, and 5-30 wt.% of a soft segment (b) obtained from the aromatic dicarboxylic acid having the naphthalene ring or the ester-forming derivative thereof and a polyalkylene glycol having 500-1,500 of the number-average molecular weight as main constituent components. The melt flow index (MFI) of the thermoplastic polyester resin composition at a set temperature of 260°C is ≥20 g/10 min, and the Charpy impact strength thereof is ≥3.2 kJ/m<SP POS="POST">2</SP>. <P>COPYRIGHT: (C)2012,JPO&INPIT |
