Process for polyphenylene oxide preparation including catalyst pre-mixing
US4477650A · kind A · utility
5Cited by
12References
15Claims
0Family size
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Key dates
| Filing date | Mar 25, 1983 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Mar 25, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The preparation of polyphenylene oxides by oxidative coupling of monohydroxy aromatic compounds in the presence of a copper-halide-amine catalyst is improved by initially preparing a homogeneous mixture by blending said monohydroxy aromatic compound and the catalyst reagents in the absence of oxygen, and subsequently contacting said mixture with oxygen to produce said polyphenylene oxide. The pre-mixing step enables the preparation of a catalyst of high activity and long life. The improved process is particularly useful for the continuous preparation of polyphenylene oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.