Process for production of poly(arylene thioether) containing phthalic anhydride groups
US5554723A · kind A · utility
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3References
2Claims
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Key dates
| Filing date | Mar 19, 1993 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Mar 19, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the production of a poly(arylene thioether) containing phthalic anhydride groups wherein a dihalogen-substituted aromatic compound is reacted with an alkali metal sulfide in a polar organic solvent containing water to produce the poly(arylene thioether) is disclosed. This process comprises causing a monohalogen-substituted phthalic compound to exist in a polymerization reaction system, and controlling a ratio, a/b of the number of moles, a of the charged dihalogen-substituted aromatic compound to the number of moles, b of the charged alkali metal sulfide within a range of 0.8<a/b<1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.