Polytetrafluoroethylene production method
US11952441B2 · kind B2 · utility
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4References
12Claims
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Key dates
| Filing date | Oct 3, 2019 |
| Grant date | Apr 9, 2024 |
| Priority date | — |
| Expiry date | Mar 17, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L27/18
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for producing polytetrafluoroethylene, which includes polymerizing tetrafluoroethylene in an aqueous medium in the presence of a nucleating agent and a hydrocarbon anionic surfactant to obtain polytetrafluoroethylene. A total amount of the nucleating agent and the hydrocarbon anionic surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.