Production process of poly(arylene sulfide) and poly(arylene sulfide)
US9096723B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2011 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Nov 22, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A production process of a poly(arylene sulfide), including (a) a polymerization step of polymerizing at least one sulfur source selected from the group consisting of alkali metal sulfides and alkali metal hydrosulfides and a dihalo-aromatic compound in an organic amide solvent to form a polymer; (b) a separation step of separating the polymer from a liquid reaction mixture containing the polymer formed after the polymerization step; (c) a washing step of washing the polymer with at least one washing liquid selected from the group consisting of water, an organic solvent and a mixed solution of water and an organic solvent as desired; and (d) an aqueous oxidizing solution treatment step of treating the polymer by bringing the polymer into contact with an aqueous oxidizing solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.