| 摘要 |
A polyblend of (a) 80-20 percent of a rubber-modified vinyl chloride resin, prepared by polymerization of vinyl chloride in the presence of 2 to 20 percent of a rubber, and (b) 20-80 percent of copolymers or terpolymers of a vinyl aromatic monomer, such as styrene, an unsaturated dicarboxylic acid anhydride, such as maleic anhydride, and an optional third monomer such as methyl methacrylate or acrylonitrile, and (c) optionally 0-15 percent of an ungrafted rubber such as a block copolymer of 1,3-butadiene and styrene; and/or 0-35 percent of a graft copolymer of rubber, styrene, and methyl methacrylate or acrylonitrile. The polyblends have high heat distortion temperatures, high impact strength, good processability, and can be made in a substantially transparent form.
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