Material for valve seats
US4792117A · kind A · utility
8Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1987 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | Apr 9, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A material for valve seats is molded of a composite resin. The composite resin is composed of polytetrafluoroethylene and a copolymer of tetrafluoroethylene and perfluoroalkylvinylether. The amount of the copolymer falls in the range of from 3% to 30% by weight, preferably in the range of from 10% to 30% by weight, based on the total amount of the composite resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.