Poly(phenylene ether) process
US8466253B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2012 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Jun 29, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/126
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of purifying a capped poly(phenylene ether) includes mixing a poly(phenylene ether) capping reaction mixture comprising a capped poly(phenylene ether), a capping agent, a capping byproduct, a capping catalyst, and a poly(phenylene ether) solvent, and first washing solvents comprising a C1-C4 alkanol and water to form a first liquid phase comprising the capped poly(phenylene ether) and poly(phenylene ether) solvent, and a second liquid phase comprising C1-C4 alkanol and water; and separating the first liquid phase from the second liquid phase. Capped poly(phenylene ether) having reduced levels of residual capping agent, capping byproduct, and capping catalyst is produced from poly(phenylene ether) capping reaction mixtures by this method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.