초록 ▼

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

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.

대표청구항 ▼

A polyblend composition comprising: (a) 80-20 percent by weight of a rubber-modified vinyl chloride resin, containing 0-20 percent, based on total monomers, of a copolymerizable, ethylenically unsaturated comonomer, selected from the group consisting of ethylene, propylene, an alpha-olefin containin

A polyblend composition comprising: (a) 80-20 percent by weight of a rubber-modified vinyl chloride resin, containing 0-20 percent, based on total monomers, of a copolymerizable, ethylenically unsaturated comonomer, selected from the group consisting of ethylene, propylene, an alpha-olefin containing 4-8 carbon atoms, vinyl acetate, vinylidene chloride, alkyl acrylate, acrylic acid, methacrylic acid, and methyl methacrylate, said resin prepared by polymerization of vinyl chloride monomer, and the comonomer, in the presence of 2-20 percent, based on the weight of the resin, of a rubber to form a discretely dispersed graft copolymer, and wherein a major amount of the polymerized vinyl chloride homopolymer or copolymer present in said resin is ungrafted to the rubber; and (b) 20-80 percent by weight of a rubber-modified polymer of a vinyl aromatic monomer and an unsaturated dicarboxylic acid anhydride monomer in weight ratios of 95:5 to 70:30, 0-25 percent, based on total monomers, of a copolymerizable ethylenically unsaturated termonomer, selected from the group consisting of methyl methacrylate, acrylonitrile, and methacrylonitrile, said polymer prepared by polymerization of said monomers, and the termonomer, in the presence of 5-25 percent, based on weight of the rubber-modified polymer, of a rubber to form a discretely dispersed graft copolymer.