Method for the preparation of a poly(arylene ether), and related compositions
US7205377B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2004 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Nov 14, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/44
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing a poly(arylene ether) with a reduced level of powder fines is described. In one embodiment, the method comprises oxidatively coupling a monohydric phenol in the presence of a solvent and a complex metal catalyst, to produce a poly(arylene ether) resin; and then removing a portion of the solvent to produce a concentrated solution having a cloud point Tcloud. The concentrated solution is then combined with an anti-solvent to precipitate the poly(arylene ether) in the form of a precipitation mixture. The concentrated solution usually has a temperature of at least about (Tcloud−10° C.) immediately before it is combined with the anti-solvent. The precipitation mixture has a temperature of at least about (Tcloud−40° C.) after its formation. Related poly(arylene ether) copolymers are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.