Treatment of polyarylene sulfide/sulfone polymers with zinc compound and acidic solution
US5235034A · kind A · utility
39Cited by
16References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1991 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | May 6, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Poly(arylene sulfide/sulfone) polymers are treated in order to increase melt stability and decrease impurities by contacting the poly(arylene sulfide/sulfone) polymer with a soluble zinc compound and an acidic solution. In one embodiment, the polymer is treated first with the soluble zinc compound, followed by treatment with the acidic solution. In another embodiment, the polymer is treated in one step with a solution comprising a water soluble zinc compound in an acidic solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.