Process for producing polyphenylene oxides
US3989671A · kind A · utility
1Cited by
4References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1974 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Feb 22, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyphenylene oxides, self-condensation products of phenols, are produced through oxidative coupling by employing a novel catalyst system which comprises a copper compound, an iodine compound and tertiary diamine which is capable of forming a stable chelate ring with the copper compound. According to this invention, copper compounds, which hitherto have been considered to be unsuitable for using with tertiary amines, act with excellent performance as a component of the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.