Agglomerate containing fibrous polytetrafluoroethylene
US3993584A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1974 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Sep 20, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/80
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A coherent, weak agglomerated dustless solid particulate mass is formed from a mixture of discrete particles in the size range from less than about 1 micron to about 2,000 microns, and fibrillatable polytetrafluoroethylene (hereinafter referred to as PTFE) in an amount from about 0.02, but less than 1 percent and preferably less than 0.75 percent by weight based on total solids, by working the mixture in a dry or relatively dry state with a working action in an unconfined zone at a temperature in excess of 20.degree. C., but below the sintering temperature of PTFE or a temperature deleterious to said particles, whichever is lower, without changing the primary particle size range of the material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.