Polyketones
US7160980B2 · kind B2 · utility
11Cited by
10References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 2002 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | May 29, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/0281
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Method of purifying a polymeric material of a type which includes (A) phenyl moieties; (B) carbonyl and/or sulphone moieties; and; (C) ether and/or thioether moieties. The method includes contacting the polymeric material with a solvent formulation which is at a temperature of greater than 100° C. and a pressure above ambient pressure thereby to charge the solvent formulation with impurities derived from the polymeric material, and separating the charged solvent from the polymeric material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.