Low-temperature impact blends of polycarbonate, graft copolymer and rigid copolymer
US4855357A · kind A · utility
3Cited by
18References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1988 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Oct 12, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L55/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polymer blend compositions comprising a polycarbonate, a graft copolymer and a rigid copolymer exhibit improved low-temperature impact properties. The polycarbonate has a weight average molecular weight, Mw, not less than 35,000 and the rigid copolymer has a weight average molecular weight, Mw, not less than 130,000. The graft copolymer is formed from at least two ethylenically unsaturated monomers graft polymerized to a rubbery polymer substrate. The rigid copolymer is formed from at least two ethylenically unsaturated monomers and is compatible with the graft copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.