| 摘要 |
1311305 - Oxymethylene polymer/two-phase polymer mixture composition FARBWERKE HOECHST AG 22 June 1970 [20 June 1969] 30089/70 Headings C3G and C3P A composition comprises (a) a stabilized homopolymer of formaldehyde or a stabilized homo- or copolymer of trioxan with a cyclic ether or acetal optionally also with an alkyl glycidyl formal, polyglycol or alkane diol diglycidyl ether or a bis-(alkane-triol) trifoimal and (b) a two-phase mixture of (i) a butadiene or acrylate homo- or copolymer thereof with each other or with styrene or acrylonitrile or a graft copolymer thereof with styrene, alphamethylstyrene, acrylonitrile or methyl methacrylate, and (ii) a homo or copolymer of styrene or alphamethylstyrene with acrylonitrile or polymethylmethacrylate. In examples, (a) is polyformaldehyde esterified with acetic anhydride, or a hydrolytically degraded (stabilized) trioxanethylene oxide copolymer, and (b) is a mixture of preformed latices of styrene-butadiene and styrene-acrylonitrile copolymers, or a mixture of polybutadiene, an acrylonitrilestyrene grafted polybutadiene and a copolymer of styrene and acrylonitrile obtained by a two stage polymerization. |
