Verfahren zur Herstellung schlagzäher Polyamidharz-Zusammensetzungen

An impact-resistant polyamide resin is produced by preparing Mixture (I) by melt-kneading (A) a polyamide resin with (B) at least one modified olefin polymer,which is an olefin rubber having an unsaturated dicarboxylic acid anhydride added thereto, an alpha -olefin polymer having an unsaturated dicarboxylic acid anhydride added thereto, a crystalline ethylene- alpha -olefin copolymer having an unsaturated dicarboxylic acid anhydride added thereto, or an ethylene-ethylenic unsaturated ester copolymers having an unsaturated dicarboxylic acid anhydride added thereto, preparing Mixture (II) by melt-kneading Mixture (I) with (C) a polyfunctional compound having in the molecule two or more functional groups reactive with carboxyl groups,carboxylic acid anhydride groups or amino groups and melt-kneading Mixture (II) with (D) a polyamide resin. The impact-resistant polyamide resin composition obtained by the process of the present invention has an excellent processability and can be made into various molded products, sheets or films by injection molding or extrusion molding. The thus obtained products have good physical properties, in particular, an excellent impact strength.