Process for polymerizing phenols to produce polyphenylene oxides of low molecular weight
US3962180A · kind A · utility
1Cited by
5References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 30, 1974 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Oct 30, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/312
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyphenylene oxides of low molecular weight are produced by oxidative polymerization of phenols in the presence of a catalyst and the amount of solvent is limited and the phenols are not added to the reaction medium at one time, but continuously over a certain period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.