Abstract: Thermoplastic resin compositions which contain specified weight proportions of a polyphenylene ether resin, a polyamide resin and a rubber polymer consisting of a mixture of ABA or ABA' types of block copolymers and an AB block copolymer are improved by the presence of a miscibility enhancer. Representative of the miscibility enhancers are citric acid, malic acid, maleic anhydride, trimellitic chloride anhydride and the like. The compositions of the invention have been found to produce molded articles of improved low-temperature impact properties.

Abstract: A process for preparing polycarbonates according to the invention by melt polycondensation of aromatic dihydroxy compounds and carbonic acid diesters, is characterized by using an aromatic dihydroxy compound and a carbonic acid diester, wherein the combined content of hydrolyzable chlorine in those monomers falls within the particular range. Another process for preparing polycarbonates according to the invention by melt polycondensation of aromatic dihydroxy compounds and carbonic acid diesters, is characterized by using a catalyst comprising (a) a nitrogen containing basic compound and (b) aromatic dihydroxy compound of an alkali metal or alkaline earth metal compound, or (a) and (b) and (c) boric acid or boric ester.

Abstract: The present invention concerns a resin composition that contains a polyphenylene ether, an oxazolinyl group-containing polyphenylene ether, and a polyester.

Abstract: Thermoplastic molding compositions of blends of polyphenylene ethers and polyesters are improved in respect to impact resistance by the addition of an organophosphorus compound of the formula: ##STR1## wherein R.sub.1 when taken independently is selected from divalent hydrocarbon residues containing 2-12 carbon atoms; each of R.sub.2 -R.sub.5 when taken independently are selected from the group consisting of alkyl groups of 2 to 12 carbon atoms, aryl groups containing 6-14 carbon atoms, alkyl-substituted aryl groups, aralkyl groups, halogen-substituted alkyl groups, halogen-substituted aryl groups of 6-14 carbon atoms, halogen-substituted alkyl-substituted aryl groups, and halogen-substituted aralkyl groups; two groups selected from among R.sub.1 -R.sub.5 may be bonded together and form a ring; provided at least one member selected from among R.sub.1 -R.sub.5 has a carbon-carbon unsaturated double bond or triple bond, and at least one member selected from among R.sub.1 -R.sub.

Abstract: Polyphenylene ether-olefin polymer copolymer compositions are prepared by the reaction of an epoxytriazine-capped polyphenylene ether with an olefin polymer containing highly nucleophilic (e.g., carboxylic acid) substituents. The copolymers have excellent properties and find utility as molding compositions and as compatibilizers for blends of similar polymers. Suitable epoxytriazine-capped polyphenylene ethers may be prepared by reaction of a polyphenylene ether with an epoxychlorotriazine such as diglycidyl chlorocyanurate, n-butyl glycidyl chlorocyanurate or mesityl glycidyl chlorocyanurate.

Abstract: A process for preparing polycarbonates according to the invention by melt polycondensation of aromatic dihydroxy compounds and carbonic acid diesters, is characterized by using an aromatic dihydroxy compound and a carbonic acid diester, wherein the combined content of hydrolyzable chlorine in those monomers falls within the particular range. Another process for preparing polycarbonates according to the invention by melt polycondensation of aromatic dihydroxy compounds and carbonic acid diesters, is characterized by using a catalyst comprising (a) a nitrogen containing basic compound and (b) aromatic hihydroxy compound of an alkali metal or alkaline earth metal compound, or (a) and (b) and (c) boric acid or boric ester.