Process for producing a tetrafluoroethylene polymer having high strength
US6803437B2 · kind B2 · utility
9Cited by
5References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 10, 2002 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Jan 13, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F14/26
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a tetrafluoroethylene polymer, which comprises polymerizing tetrafluoroethylene in an aqueous medium in the presence of a water-soluble initiator, wherein the water used for the polymerization is regulated to have a TOC of 100 ppb or lower and/or an electrical conductivity of 1.0 &mgr;S/cm or lower. When this process for producing a tetrafluoroethylene polymer is employed, a decrease or fluctuation in the polymerization rate during the polymerization of tetrafluoroethylene will be minimal, and a deterioration in the physical properties of the obtained tetrafluoroethylene polymer will be minimal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.