| abstract |
(57) [Problem] To provide an excellent additive or a thermoplastic resin composition capable of improving heat aging resistance when a thermoplastic resin is molded. The dibasic erythritol esters of the present invention (further, some of the hydroxyl groups of the erythritol portion may be esterified as long as the degree of esterification does not exceed 50%) and a filler. If necessary, an antioxidant, particularly a solid antioxidant under normal temperature and pressure, is blended with each of the specific thermoplastic resins used in the present invention (for 100 parts by weight of the thermoplastic resin, the dibasic erythritol ester With less than 1 part by weight of the obtained thermoplastic resin composition, the strength properties and heat aging resistance of a resin molded product obtained by molding the thermoplastic resin composition are remarkably improved. |