Methods for preparing polyphenylene ether resin
US6492300B2 · kind B2 · utility
2Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J37/0018
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for preparing a polyphenylene ether resin is described. In one embodiment the method comprises: preparing a magnesium-based alkylation catalyst, by dry-blending at least one filler with a magnesium reagent which yields magnesium oxide upon calcination; calcining the alkylation catalyst; reacting a phenolic compound and an alkyl alcohol in the presence of the alkylation catalyst, to form a 2,6-alkyl-disubstituted phenolic compound; and oxidatively coupling the 2,6-alkyl-disubstituted phenolic compound in the presence of a suitable polymerization catalyst, to form the polyphenylene ether resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.