Process for the preparation of polyphenylene ethers with activated copper-amine catalysts
US3988297A · kind A · utility
15Cited by
4References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1974 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Jul 3, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is disclosed herein an improved process for the preparation of high molecular weight polyphenylene ethers by oxidatively coupling a di-ortho substituted phenolic precursor in a reaction vessel containing oxygen and a complex catalyst formed from a copper salt and either a primary, secondary or tertiary amine wherein in the presence of an aqueous phase a quaternary ammonium salt is employed to promote the rate of reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.