Process for production of high to ultra-high molecular weight linear polyarylenesulfides
US4645826A · kind A · utility
99Cited by
19References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 18, 1985 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Jun 18, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/0254
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
By maintaining an arylenesulfide prepolymer with a melt viscosity of 5 to 3,000 poise at a temperature of 245.degree. to 290.degree. C. under a liquid-liquid two-phase separated state in a solvent for 1 to 50 hours, the molecular weight of said prepolymer is increased to a high to ultra-high value while the linearity of the polymer is retained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.