| 摘要 |
1342653 Polyphenylene oxide resin compositions UNIROYAL Inc 19 April 1971 [20 April 1970] 25516/71 Headings C3R and C3P A thermoplastic blend composition comprises (a) from 75-99% wt. of a polyphenylene oxide resin having the repeating unit where n is at least 100, and Q 1 -Q 4 are hydrogen, halogen, a hydrocarbon halohydrocarbon, hydrocarbonoxy or halohydrocarbonoxy radical free of tertiary alpha carbon atoms and having at least two carbon atoms between any halogen and the phenol nucleus, and optionally an alkenyl, aromatic polymeric resin, and (b) from 1-25% wt. of an ethylene-vinyl containing organic acid-ester copolymer selected from the general formulae where A is H, CH 3 , C 2 H 5 or halogen, and R is an alkyl, cycloalkyl, aralkyl or aryl radical containing not more than 12 carbon atoms. The polyphenylene oxide preferably comprises at least 50% by wt. of (a). The alkenyl aromatic resin preferably consists of (i) from 25-100% wt. of polymer units derived from compounds having the formula where X is H or a C 1-6 alkyl, Y is H, halogen or C 1-4 alkyl, n = 1-5 and (ii) no more than 75% wt. polymer units derived from compounds of the formula R 1 -CH = CR-(CH 2 ) n -R 2 where R and R 1 are H, halogen, C 1-4 alkyl or carboalkoxy; or R 1 and R compositely represent an anhydride linkage; R 2 is H, vinyl, C 1-12 alkyl or alkenyl, cycloalkyl, carboalkoxy, alkoxy alkyl, alkyl carboxy, ketoxy, halogen, carboxy, cyano or pyridyl and n = 0-9. Examples of alkenyl aromatic polymers are polystyrene, poly-α- methyl styrene, polychlorostyrenes, styreneacrylonitrile copolymers, styrene-butadiene copolymers,α-alkyl-styrene-acrylonitrile copolymers, styrene-acrylonitrile-butadiene terpolymers, copolymers of ethyl-vinyl benzene and divinyl benzene, high impact polystyrenes, styrene-acrylonitrile-α-methyl styrene terpolymer, styrene-maleic anhydride copolymer, styrene - butyl - acrylate-acrylonitrile terpolymer. Examples of copolymer (b) are ethylene-ethyl acrylate and ethylene-vinyl acetate. Uses.-Moulding powders for preparing moulded, calendered or extruded articles.
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