Unsaturated polyester-modified flexible copolymers for use in sheet molding compositions
US5385963A · kind A · utility
21Cited by
40References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 1993 |
| Grant date | Jan 31, 1995 |
| Priority date | — |
| Expiry date | Jan 7, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G81/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
ABA block copolymers having saturated polyester midblocks "B" and unsaturated polyester condensation end blocks A of molecular weight from about 100 to 500 or 600 are described which increase the flexural strain to failure of unsaturated polyester or vinyl ester resins. These ABA block copolymers are generally compatible with unsaturated polyester resins and increase flexural strain by a different mechanism than used by incompatible rubbery polymers. These ABA block copolymers are compatible with the unsaturated polyester compositions and do not phase separate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.