High purity diphenyl sulfone, preparation and use thereof for the preparation of a poly(aryletherketone)
US9765185B2 · kind B2 · utility
2Cited by
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4Claims
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Key dates
| Filing date | Aug 10, 2015 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Aug 10, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/3444
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The presence of certain impurities in diphenyl sulfone have a deleterious effect on the properties of the poly(aryletherketone)s produced therein, including one or more of color, melt stability, molecular weight, crystallinity, etc. and here identify those impurities and provide processes for the recovery of the diphenyl sulfone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.