Thermoplastic moulding materials - contains modified polyphenylene ether, partly-crystalline propylene or block copolymer and opt. impact-modifying rubber, polyamide, etc.

摘要

Thermoplastic moulding materials (I) are claimed, contg. mainly (A) 10-70 wt.% modified polyphenylene ether (PPE) and (B) 30-90 wt.% partly-crystalline polypropylene (PP) and/or a partly-crystalline block copolymer contg. at least 50 wt.% (D) 0-20 wt.% thermoplastic polyamide and (E) 0-60 wt.% fibrous or particulate filler and/or additives etc. (I), contg. at least one of (D) or (E), are produced by a continuous process in an extruder, by (i) mixing (A), (B) and (C) in a first zone at 240-350 deg.C for a mean residence time of 0.2-30 mins., (ii) adding (D) and (E) at 250-350 deg.C in at least one further zone of the extruder, and homogenising and extruding the mixt. USE/ADVANTAGE - (I) are useful for the prodn. of mouldings, film and fibre (claimed); moulded prods. obtd. from (I) are claimed as such. (I) have a good overall spectrum of mechanical properties and can be moulded with no problems (e.g. mould corrosion or delamination - contrast prior-art PPE/PP blends); the prods. are useful, e.g. in the automobile industry.