Verfahren zur Herstellung von modifizierten Polyphenylenoxiden sowie Formmassen aus diesen Polyphenylenoxiden

摘要

1312365 Modified polyphenylene oxide SUMITOMO CHEMICAL CO Ltd 10 Dec 1970 [12 Dec 1969] 58664/70 Headings C3P and C3R A modified polyphenylene oxide is obtained by the oxidative polymerization of a phenol in the presence of an ethylene-α-olefin copolymer or ethylene-α-olefin-polyene terpolymer, or a halogenated or hydroperoxide derivative thereof. A product is obtained in which at least some of the copolymer or terpolymer is grafted on to the polyphenylene oxide, the remainder being in admixture therewith. The phenol may have the formula where R1, R2, R3, R4 and R5 are hydrogen or halogen atoms or hydrocarbon, halo-substituted hydrocarbon, cyano-substituted hydrocarbon, hydrocarbonoxy or halo-substituted hydrocarbonoxy groups, at least one being hydrogen and at least one being other than hydrogen. The copolymer or terpolymer is used in an amount such that the modified polyphenylene oxide contains from 0À5 to 20% by weight of the copolymer or terpolymer, at least some of which is grafted on to the polyphenylene oxide. In examples, 2,6-xylenol is polymerized in solvents by passing oxygen through the solutions in the presence of catalysts, the reaction mixtures also containing ethylene-propylenedicyclopentadiene terpolymer, ethylene-propylene copolymer, ethylene-propylene-1,4-hexadiene terpolymer and ethylene-propylene-ethylidenenorbornene terpolymer; the products are shown to have superior properties to those of blends of polyphenylene oxide with the copolymers and terpolymers.