Aqueous dispersion of particulate spheroidal polytetrafluoroethylene
US4038230A · kind A · utility
4Cited by
1References
1Claims
0Family size
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Key dates
| Filing date | Jan 31, 1973 |
| Grant date | Jul 26, 1977 |
| Priority date | — |
| Expiry date | Jan 31, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F6/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Particulate polytetrafluoroethylene dispersion resin characterized by high molecular weight, relatively large particle size, uniform spherical particle shape and narrow particle size distribution, which is suitable for making stable concentrated aqueous polytetrafluoroethylene dispersions of concentrations higher than heretofore available, is made by polymerization of tetrafluoroethylene in aqueous dispersion in the conjoint presence of fluid octafluorocyclobutane and certain polyfluorinated carboxylic acid salt dispersing agents, using water-soluble peroxide initiators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.