Cycloolefin copolymer resin composition and process for preparing the same
US6331591A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1999 |
| Grant date | Dec 18, 2001 |
| Priority date | — |
| Expiry date | Nov 23, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L53/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A cycloolefin copolymer resin composition having well-balanced transparency and impact resistance which comprises (A) a cycloolefin copolymer and (B) 1 to 100 parts by weight, per 100 parts by weight of said cycloolefin copolymer, of at least one rubber-like polymer selected from the group consisting of (B1) an aromatic vinyl-isobutylene copolymer and (B2) an aromatic vinyl-conjugated diene copolymer, wherein the difference in refractive index (nD) at 20.degree. C. between the components (A) and (B) is at most 0.015 and the particle size of the component (B) dispersed in the component (A) is from 0.4 to 3 .mu.m. The composition may further contain a core-shell polymer (C), whereby the impact resistance can be further improved. The composition is prepared by kneading the above components at an elevated temperature optionally in the presence of an organic peroxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.