Polyamide Resin Composition Manufacturing Method And Molded Article

Abstract: This invention provides a polyamide resin composition that excels in terms of heat aging resistance surface appearance stability during molding dimensional accuracy chemical resistance and the like. (I) A polyamide resin containing a specific amount of a compound that has a specific structure and/or a specific amount of a condensation product of said compound said compound having a hydroxyl group and either an epoxy group or a carbodiimide group. Alternatively (II) a polyamide resin containing a specific amount of an aliphatic compound that has three or more amino groups or three or more hydroxyl groups in each molecule and a specific amount of a compound that has in each molecule two or more functional groups that can react with the aforementioned amino groups or hydroxyl groups wherein if a 3.2 mm thick ASTM 1 dumbbell obtained by injection molding said polyamide resin is heat treated for 100 hours at 130°C in air the carboxyl group concentration of the polyamide resin between the surface of the molded article and a depth of 0.2 mm increases by less than 70%.

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