Dispersant attached polytetrafluoroethylene particle, composition, layered material, electrophotographic photoreceptor, process cartridge, and image forming apparatus
US11066543B2 · kind B2 · utility
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6References
20Claims
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Key dates
| Filing date | Sep 11, 2019 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Sep 11, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K23/007
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A dispersant attached polytetrafluoroethylene particle on whose surface a dispersant having a fluorine atom is attached has a content of perfluorooctanoic acid of from 0 ppb to 25 ppb with respect to the polytetrafluoroethylene particle, and a composition contains a polytetrafluoroethylene particle and a dispersant having a fluorine atom in which a content of perfluorooctanoic acid is from 0 ppb to 25 ppb with respect to the polytetrafluoroethylene particle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.