Heat resistant styrenic polymer blends
US5212240A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1991 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Apr 22, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L25/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are styrenic polymer blends, preferably rubber modified styrenic polymer blends, containing a binary styrene/acrylonitrile copolymer in combination with a fumaronitrile-containing styrenic copolymer. The preferred rubber modified styrenic polymer blends hereof have improved heat and impact resistances and are composed of a binary styrene/acrylonitrile copolymer grafted to and/or occluded within a rubber substrate and dispersed in a matrix phase copolymer comprising fumaronitrile, styrene, and, optionally, acrylonitrile such that the concentration of acrylonitrile in the grafted and/or occluded portion of the rubber modifier is at least equal to and is preferably greater than the total concentration of fumaronitrile and acrylonitrile in the copolymer of the matrix phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.