Method for producing low molecular weight polytetrafluoroethylene, low molecular weight polytetrafluoroethylene, and powder
US10793650B2 · kind B2 · utility
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2Claims
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Key dates
| Filing date | Nov 26, 2019 |
| Grant date | Oct 6, 2020 |
| Priority date | — |
| Expiry date | Nov 26, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Low molecular weight polytetrafluoroethylene powder having a complex viscosity of 1×102 to 7×105 Pa·s at 380° C., containing 5 or less carboxyl groups at ends of the molecule chain per 106 carbon atoms in the main chain, and being substantially free from C8-C14 perfluorocarboxylic acids and salts thereof. Also disclosed is a method for producing low molecular weight polytetrafluoroethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.