Blend of polyphenylene ether, polycarbonate or polyoxymethylene resins and multi-phase thermoplastic resins

A thermoplastic resin composition which comprises:

• (i) 10 to 30% by weight of polyphenylene ether resin alone or a mixture of the polyphenylene ether resin and a styrene polymer,
• (II) 90 to 70% by weight of at least one kind of resin selected from the group consisting of polycarbonate resins and polyoxymethylene resins, and
• (III) 0.1 to 100 parts by weight, based on 100 parts by weight of the resins (I) +(II), of a multi-phase structure thermoplastic resin formed by melting and mixing a graft polymerization precursor obtained by copolymerizing at least one vinyl monomer selected from the group consisting of vinyl aromatic monomers, (meth)acrylonitrile monomers, and vinyl ester monomers, with at least one radical polymerizable or copolymerizable organic peroxide represented by the following general formulae (a) and (b) ##STR3## wherein R.sub.1 is a hydrogen atom or an alkyl group having 1 or 2 carbon atoms, each of R.sub.2 and R.sub.7 is a hydrogen atom or a methyl group, R.sub.6 is a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, each of R.sub.3, R.sub.4, R.sub.8, and R.sub.9 is an alkyl group having 1 to 4 carbon atoms, each of R.sub.5 and R.sub.10 is an alkyl group having 1 to 12 carbon atoms, a phenyl group, an alkyl-substituted phenyl group or a cycloalkyl group having 3 to 12 carbon atoms, m is 1 or 2, and n is 0, 1 or 2, in particles of an epoxy group-containing olefin copolymer which is composed of 60 to 99.5% by weight of ethylene and 40 to 0.5% by weight of glycidyl acrylate or methacrylate.