Process for preparation of fluorinated sulfinates
US6462228B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 2000 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Sep 25, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F14/18
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparation of a fluorinated sulfinate product by reacting a mixture comprising: (1) water; (2) dehalogenating and sulfinating reagent: and (3) fluoroaliphatic sulfonyl fluoride represented by the formula: Rf—[SO2F]n; and (4) at least one of the material selected from the group consisting of: (i) fluorinated surfactant, or (ii) organic cosolvent comprising, as the major component by weight of the organic solvent, alcohol having a boiling point of less than 110° C. at 760 torr; by heating the reaction mixture to a temperature between about 50° C. and 100° C. until the desired product yield is achieved. Also provided is a process of using the fluorinated sulfinate product as an initiation system for a free radical polymerization process, such as that used to prepare fluoropolymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.