Reduced gloss thermoplastic compositions and processes for making thereof
US5580924A · kind A · utility
34Cited by
15References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1993 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Feb 23, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L69/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Reduced gloss polycarbonate graft polymer blends are provided by a process which involves compounding styrene-acrylonitrile copolymer in the presence of an electrophilic reagent and preferably an acid to form gels, and then compounding the resultant gels with polycarbonate, a styrene-acrylonitrile copolymer and ABS graft polymer to form reduced gloss PC/ABS/SAN composition. The process limits side reactions during gel formation by preparing the gels first and then compounding the gels with the other resin materials. The blends are useful as molding resins and the gelled acrylonitrile polymer is useful as a gloss reducing additive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.