Polyphenylene ether compositions
US4128604A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1977 |
| Grant date | Dec 5, 1978 |
| Priority date | — |
| Expiry date | Jun 23, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/123
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There are provided high impact strength thermoplastic compositions comprising a polyphenylene ether and a rubber modified polystyrene resin. The compositions include a dispersed phase of rubber particles having a maximum mean diameter of 2 microns and preferably from about 0.5 to 2 microns; the composition contains greater than 22% by weight of a rubber gel phase on a polyphenylene ether-free basis; and the rubber comprises a polybutadiene having a cis-1,4 content of at least 50% by weight and a vinyl content of no more than 10% by weight. The compositions provide molded articles with substantial and unexpected improvements in impact resistance, surface appearance and resistance to aggressive solvent systems and the retention of impact strength at sub-zero temperatures is particularly outstanding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.