| 摘要 |
A thermoplastic resin composition is provided to realize improved processing stability by preventing deterioration caused by thermal oxidation during a molding process, and to improve thermal coloring resistance and NOx coloring resistance. A thermoplastic resin composition comprises a phosphite ester represented by the following formula (I), dimethyl succinate and a polymer of 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol, and hydrotalcite in a thermoplastic resin. In formula (I), two R1s, two R2s, R4 and R5 represent H, a C1-C8 alkyl, C5-C8 cycloalkyl, C6-C12 alkylcycloalkyl, C7-C12 aralkyl or phenyl; two R3 represent H or a C1-C8 alkyl; X is a single bond, sulfur or -CHR6 group(wherein R6 is H, a C1-C8 alkyl or C5-C8 cycloalkyl); A is a C1-C8 alkylene group or *-COR7 group(wherein R7 is a single bond or a C1-C8 alkylene and * represents a bond on the oxygen side); and one of Y and Z is OH, a C1-C8 alkoxy or C7-C12 aralkyloxy, and the other represents H or a C1-C8 alkyl.
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