Spheroidal particulate polytetrafluoroethylene dispersion resin
US4145502A · kind A · utility
4Cited by
1References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 1977 |
| Grant date | Mar 20, 1979 |
| Priority date | — |
| Expiry date | May 6, 1997 |
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 liquid 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.