High purity diphenyl sulfone, preparation and use thereof for the preparation of a poly(aryletherketone)
US8710171B2 · kind B2 · utility
1Cited by
10References
12Claims
0Family size
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Key dates
| Filing date | Oct 23, 2009 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Jul 31, 2030 |
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 removal of such impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.