Process for producing fluorinated copolymer
US9624329B2 · kind B2 · utility
3Cited by
11References
10Claims
0Family size
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Key dates
| Filing date | Dec 6, 2013 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Dec 31, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F228/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for producing a fluorinated copolymer includes polymerizing a fluorinated monomer having a carboxylic acid functional group or a sulfonic acid functional group and a fluorinated olefin by a solution polymerization method in a polymerization medium to obtain a mixture containing a fluorinated copolymer, an unreacted monomer and the polymerization medium. The mixture is continuously or intermittently transferred to an evaporation vessel provided with a stirrer and heating the mixture with stirring in the evaporation vessel to evaporate and recover the unreacted monomer and the polymerization medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.