Method for producing composition containing low molecular weight polytetrafluoroethylene
US11618806B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Feb 5, 2019 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Feb 5, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F14/26
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for producing a composition containing low molecular weight polytetrafluoroethylene, the method including: (I) irradiating a composition containing high molecular weight polytetrafluoroethylene with ionizing radiation to obtain a composition containing low molecular weight polytetrafluoroethylene having a melt viscosity at 380° C. in the range of 1.0×102 to 7.0×105 Pa·s; and (II) carrying out at least one selected from the group consisting of washing treatment, steam treatment and decompression treatment on the composition containing low molecular weight polytetrafluoroethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.