Process for the preparation of moulded parts under increased melt rigidity

摘要

Preparation of molded article (A) by condensation of a polyamide molded mass with a compound (I) with at least two carbonate units comprises providing a polyamide molding material, producing a mixture of polyamide molding material and (I), optionally storing and/or transporting the mixture, and subsequently processing the mixture to molded part, where the molded mass is hollow body or a hollow profile with an outer diameter of at least 30 mm and with a wall thickness of at least 1 mm. An independent claim is included for a molded article obtained by the method.