Mixtures resulting from methods for purification of polyether polymers
US8729214B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | Feb 5, 2013 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Feb 5, 2033 |
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.