| 摘要 |
<p>The impact-resistance characteristics of styrene/acrylonitrile copolymers (SAN) are improved by the admixture to them of acrylic rubbers consisting of either copolymers or terpolymers of ethyl and/or butyl acrylate with acrylic and/or methacrylic acid, by carrying out the mixing in the presence of from 0.05 to 2% by weight of ZnCl<Sub>2</Sub>, CdCl<Sub>2</Sub>, FeCl<Sub>3</Sub>, AlCl<Sub>3</Sub>, or BF<Sub>3</Sub>·(C<Sub>2</Sub>H<Sub>5</Sub>)<Sub>2</Sub>O, and of 0.5-5 mols, based on 100 mols of acrylic rubber, of an epoxy cross-linking compound, at a temperature comprised between the glass transition temperature of the SAN copolymer and 220°C.</p> |
