Blends of a rubber-modified polyvinyl chloride resin and rubber-

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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525 74, 525 75, 525 76, 525 78, 525 80, 525 84, 525 85, C08L 5104, C08L 5300

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active

044698445

ABSTRACT:
A polyblend exhibiting high heat distortion temperatures, high impact strength, good processability, and which can be made in a substantially transparent form is produced from (a) 80-20 percent of a rubber-modified vinyl chloride resin, prepared by polymerization of vinyl chloride in the presence of 2-20 percent of a rubber; and (b) 20-80 percent of a rubber-modified copolymer or terpolymer of a vinyl aromatic monomer, such as styrene, an unsaturated dicarboxylic anhydride, such as maleic anhydride, an optional third monomer such as methyl methacrylate or acrylonitrile, prepared by polymerizing the monomers in the presence of 5-25 percent of one or more rubbers; and (c) optionally 0 to 10 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.

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patent: 4339544 (1982-07-01), Doak
Hall, Kruse, Mendelson and Trementozzi, Organic Coatings & Plastics Chemistry Div., vol. 47, p. 298, Meeting of the Am. Chem. Soc., Sep. 12-17, 1982.

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