Prepn. of polyamide moulding compsns. with good demouldability

摘要

Compsns. (I) contain (A) 65-97 wt.% polyamide, (B) 3-35 wt.% graft rubber with a gel content of at least 50 wt.% and glass transition temp. below -20 deg.C, where (A) + (B) = 100%, and (C) 0.1-1 wt.% on (A) plus (B), tetrafluoroethylene polymer. - Prepn. of (I) comprises (1) mixing aq., finely divided dispersion of a (B) with a dispersion of a (C) having average particle size 0.05-20 microns in wt. ratio (B) to (C) of 80:20-99:1, (2) isolating the polymers therefrom by coagulation, drying, and (3) admixing the prod., opt. after granulating, with an (A) in the melt, opt. other graft polymers and additives being present.