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US 6,203,733 B1Granted
Process for producing granulated polytetrafluoroethylene powder
AssigneeAsahi Glass Company, Limited
InventorsAtsushi Funaki, Teruo Takakura
Life of this patent
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Abstract
A polytetrafluoroethylene powder having an average particle size of at most 200 μm is stirred and granulated in a 2 phase liquid medium comprising water and perfluoroalkyl alkyl ether, to obtain a granulated powder of polytetrafluoroethylene.
Claims7
A method for preparing a granulated powder of polytetrafluoroethylene, which comprises stirring and granulating a polytetrafluoroethylene powder having an average particle size of at most 200 μm in a two phase liquid medium comprising water and a perfluoroalkyl alkyl ether of the formula 1:
- R—O—R′ Formula 1
- wherein, R is a C2-6 perfluoroalkyl group, and R′ is a C1-2 alkyl group.
Dependencies are inferred from the claim text.