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Abstract

Reinforced thermoplastic molding materials containing, as essential components, (A) from 40 to 94 parts by weight of a polymer component of (a.sub.1) from 10 to 90% by weight of polyphenylene ether and (a.sub.2) from 10 to 90% by weight, based in each case on A, of a styrene polymer toughened with an acrylate rubber or with an unhydrogenated or hydrogenated polymer of a conjugated diene, (B) from 1 to 20 parts by weight of a copolymer of (b.sub.1) from 70 to 99.9% by weight of a monomer from the group consisting of styrene, .alpha.-methylstyrene and styrene alkylated in the nucleus or a mixture of these monomers, (b.sub.2) from 0.1 to 30% by weight of one or more compounds from the group consisting of tert-butyl acrylate and tert-butyl methacrylate, or one or more compounds from the group of compounds of the general formula I ##STR1## where R.sup.1 is hydrogen or methyl and R.sup.2, R.sup.3 and R.sup.4 are each an alkyl or alkoxy group of not more than 4 carbon atoms, or of the general formula II ##STR2## where n is an integer from 1 to 4 and R.sup.5, R.sup.6 and R.sup.7 are each one of the radicals stated for R.sup.2 or are each --O(CH.sub.2 --CH.sub.2 --O).sub.m R.sup.8, where R.sup.8 is C.sub.1 -C.sub.4 -alkyl and m is 1, 2, 3 or 4, and (b.sub.3) from 0 to 10% by weight, based on the copolymer, of a further ethylenically unsaturated monomer which is copolymerizable with b.sub.1 and b.sub.2, and (C) from 5 to 50 parts by weight of a reinforcing agent, the number of parts by weight being based on 100 parts by weight of the sum of A, B and C, are prepared and used for the production of moldings.

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