Process for producing polyphenylene ether, dispersing polyether in aqueous medium and heating dispersion
US4895929A · kind A · utility
3Cited by
5References
22Claims
0Family size
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Key dates
| Filing date | Jun 25, 1987 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Jun 25, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2371/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a polyphenylene ether is disclosed, comprising oxidatively polymerizing a phenol in an organic solvent in the presence of a catalyst for oxidative polymerization, finely dispersing the resulting polyphenylene ether containing the organic solvent in an aqueous dispersion medium containing an acid compound, and heating the aqueous dispersion to remove the solvent from the polyphenylene ether. The resulting polyphenylene ether has excellent powder properties and contains a reduced amount of a catalyst residue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.