POLYAMIDE RESIN COMPOSITION, MANUFACTURING METHOD, AND MOLDED ARTICLE

摘要

There is provided a polyamide resin composition having excellent heat aging resistance, surface appearance, retention stability, dimensional accuracy, chemical resistance and the like. There is provided (I) a polyamide resin composition including a specified amount of a compound and/or its condensate that includes a hydroxyl group and an epoxy group or a carbodiimide group and has a specific structure. There is also provided (II) a polyamide resin composition including specified amounts of an aliphatic compound having three or more amino groups or three or more hydroxyl groups per molecule and a compound having more than one functional group per molecule that is reactive with the amino group or the hydroxyl group, wherein in the case where an ASTM No. 1 dumbbell of 3.2 mm in thickness produced by injection molding of the polyamide resin composition is processed in the atmosphere by heat treatment at 130°C for 100 hours, an increase rate in concentration of a carboxyl group in the polyamide resin composition from a surface of the molded product to a depth of 0.2 mm after the heat treatment is lower than 70%.