| 摘要 |
1277514 Graft polymer compositions TORAY INDUSTRIES Inc 8 Dec 1969 [6 Dec 1968] 59762/69 Heading C3G A thermoplastic composition comprises (I) a copolymer of (a) from 98 to 40% by weight of monomer comprising at least 70% by weight of a vinyl or vinylidene aromatic monomer, a C 1 to C 3 -alkyl methacrylate or acrylonitrile in which the sum of the percentage by weight of the methacrylate and 3À5 times the percentage of acrylonitrile is from 25 to 150% of the weight of monomer or monomer mixture with (b) from 2 to 60% of a rubbery graft activated copolymer of from 60 to 95% by weight of ethylene and from 40 to 5% of vinyl acetate and (II) an ABS type resin, the weight of component (II) being from 2 to 70% of the weight of components (I) and (II) and the weight of the rubbery graft activated copolymer component of (I) being at least 1% by weight of (I) and (II). The graft activated copolymer of component (I) is an ethylene-vinyl acetate or ethylene-vinyl acetatetermonomer copolymer into the side groups of which CH 2 =CHCOO- or CH 2 =C(CH 3 )COO- groups have been introduced by an ester interchange or esterification reaction. In examples, ethylene-vinyl acetate copolymer activated with methyl methacrylate is grafted with styrene and acrylonitrile and blended with a graft polymer of styrene and acrylonitrile or polybutadiene, or a mixture thereof with a styrene-acrylonitrile copolymer. |
