Method for producing purified fluoropolymer
US11220561B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Apr 22, 2019 |
| Grant date | Jan 11, 2022 |
| Priority date | — |
| Expiry date | Apr 22, 2039 |
Classification
- Technology area (CPC —)General
Abstract
Provided is a method for producing a purified fluoropolymer containing less fluoridable end groups. The production method includes: (a) melting a fluoropolymer to give a molten fluoropolymer; (b) reducing a reaction inhibitor in the molten fluoropolymer; (c) bringing the molten fluoropolymer into contact with an active substance after the step (b); and (d) removing a volatile matter from the molten fluoropolymer after the step (c).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.