Vinyl chloride resin composition
US6204327A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Apr 27, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L51/003
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A vinyl chloride resin composition containing a graft copolymer A having an average particle diameter of at least 0.15 .mu.m, prepared by polymerizing 50 to 90% of a solid matter of a rubber latex having a glass transition temperature of at most O.degree. C., the rubber latex being prepared by polymerizing 50 to 100% of butadiene and/or alkyl acrylate, 0 to 40% of an aromatic vinyl monomer, 0 to 10% of a vinyl monomer and 0 to 5% of a polyfunctional monomer, with 10 to 50% of a mixture comprising 10 to 100% of an alkyl methacrylate, 0 to 90% of an aromatic vinyl monomer, 0 to 25% of a vinyl cyamide monomer and 0 to 20% of a vinyl monomer; a graft copolymer B having an average particle diameter of 0.05 to 0.13 .mu.m, prepared by polymerizing 50 to 90% of the solid matter of the rubber latex with 10 to 50% of the mixture; and a vinyl chloride resin C; wherein the weight ratio of (copolymer A)/(copolymer B) is 50/50 to 90/15, and the weight ratio of (the total amount of copolymer A and copolymer B)/(vinyl chloride resin composition C) is 1/99 to 30/70; the composition being excellent in impact resistance and usable for the production of a pipe, a window frame and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.