Block copolymer rubber, resin modifier, and resin composition
US6835781B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2002 |
| Grant date | Dec 28, 2004 |
| Priority date | — |
| Expiry date | Jan 14, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An aromatic vinyl-conjugated diene block copolymer rubber comprising 50 to 75% by weight of conjugated diene monomer units and 25 to 50% by weight of aromatic vinyl monomer units, wherein the content of vinyl bond in the conjugated diene monomer units is at least 50% by weight, the ratio of blocked aromatic vinyl in the aromatic vinyl monomer units is at least 70% and the number average molecular weight of the copolymer rubber is in the range of 280,000 to 1,000,000. An aromatic vinyl resin having incorporated therein the aromatic vinyl-conjugated dione block copolymer rubber gives a shaped article having good impact resistance and luster, and characterized in that the luster is thermally stable and the luster varies only to a minimized extent within the shaped article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.