Polymer reinforced fluid seal
US5823540A · kind A · utility
11Cited by
11References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Sep 25, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2200/0645
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A fluid seal for ball control valves formed from a composition comprising a fluorinated resin, a reinforcing polymer, and, optionally, molybdenum disulfide, which has been compression molded in a tube mold, heat sintered and annealed. Such a formed ball seal has improved properties of chemical resistance, hydrolysis and creep resistance, a sufficient hardness for low wear, a reduced coefficient of friction, and is virtually nonabrasive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.