Method for purification of polyether polymers and mixtures resulting therefrom
US8372941B2 · kind B2 · utility
6Cited by
12References
16Claims
0Family size
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Key dates
| Filing date | Dec 21, 2007 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Jan 6, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L79/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for the purification of aromatic polyether polymers prepared by a halide displacement polymerization process comprises adsorbing the catalyst with an alkali metal halide to form an adsorbent component and then removing the adsorbent component. Mixtures resulting from this method are also discussed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.