Composite rubber particles and graft copolymer particles of composite rubber
US5834563A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1997 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | May 6, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F255/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides the composite rubber particles and graft copolymer particles of composite rubber which can be used as the impact modifier being excellent in weather resistance, thermal stability, and particularly impact resistance without substantially lowering transparency of each resin. The composite rubber particles have intertwined molecular chains of the isobutylene polymer and the vinyl polymer so that the both polymers cannot be separated substantially from each other and the graft copolymer particles of composite rubber are prepared by graft-polymerizing at least one vinyl polymer to the above composite rubber particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.