Patent ID: 8647551

Claim:
A process for producing a molded article having a hollow body, comprising: preparing a mixture of a first molding composition comprising a polyamide component and a second molding composition comprising a compound having at least two carbonate units, without permitting condensing-up of the polyamide component by the compound having at least two carbonate units and without permitting the first molding composition and the second molding composition to melt, during preparation of the mixture; and feeding the mixture into an extruder configured to form the molded article having the hollow body and operating the extruder under conditions that cause condensing-up of the polyamide molding composition by the compound having at least two carbonate units to produce the molded article having the hollow body; wherein: the polyamide component comprises a polyamide in which at least 50% of end groups are amino end groups; the polyamide component comprises at least 5 ppm of phosphorus in the form of an acidic compound; the polyamide component is modified with a salt of a weak acid in an amount of from 0.001 to 10% by weight, based on a total weight of the polyamide component; and the molded article has an external diameter of at least 30 mm and a wall thickness of at least 3 mm.