Recovering granular poly(arylene sulfide) particles from a poly(arylene sulfide) reaction mixture
US4415729A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1982 |
| Grant date | Nov 15, 1983 |
| Priority date | — |
| Expiry date | Jun 4, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/0281
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for recovering granular poly(arylene sulfide) from a polymerization reaction mixture at a temperature above that at which poly(arylene sulfide) is in molten phase comprising polar organic solvent and poly(arylene sulfide) in which, in the presence of a sufficient amount of separation agent to cause a phase separation of molten poly(arylene sulfide) and polar organic solvent, the temperature of the polymerization reaction mixture is reduced sufficiently to solidify the poly(arylene sulfide) to produce a slurry comprising particulate poly(arylene sulfide) in polar organic solvent. In a preferred embodiment a slurry comprising particulate poly(phenylene sulfide) in N-methyl-2-pyrrolidone is produced using water, and optionally an alkali metal carboxylate, as separation agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.