Rubber-modified resin blends
US4904730A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1989 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | May 30, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L25/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An impact resistant polymeric composition and a process for its production. The composition comprises a rigid polymeric matrix comprising an anionically polymerized copolymer of at least one isopropenyl aromatic monomer and at least one vinyl aromatic monomer, said matrix having dispersed therein an elastomeric phase comprising at least one moderately cross-linked ungrafted rubber and at least one moderately cross-linked lightly-grafted rubber, wherein the lightly-grafted rubber has a graft-to-rubber ratio of 0.9:1 or less. The elastomeric phase is melt agglomerated to provide aggregates having particle sizes in the range from 3,000 to 100,000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.