Process for isolation of polyphenylene ether resin by crumbing in hot water
US4263426A · kind A · utility
10Cited by
30References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1978 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Nov 6, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved method is provided for the recovery of a friable crumb-form of resinous compositions comprising polyphenylene ethers. The method comprises polymerization of a monohydric phenol, removal of the catalyst employed, heating, I.V. stabilization, optionally, capping, and product recovery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.