Gasket coating
AssigneeFederal-Mogul Technology Limited
InventorsAlan Atkinson, Stephen Bond, Darryl Turland
Life of this patent
Estimating the term…
Abstract
A sealing-enhancing coating for a gasket or a portion of a gasket comprises flaky particles of chemically exfoliated vermiculite, at least 90% by weight of said particles having a thickness of no more than 30 microns, and no dimension greater than 1 mm. The particles form 10 to 90 wt. % of the coating. The coating also comprises 50 to 10 wt. % of an organic polymer binder which when formed into a film 1 mm or less in thickness and heated to 300° C. in free air for 24 hours either does not decompose or decomposes leaving a residue of at least 20% by weight of film.
Claims22
1-12. (canceled)
The gasket assembly of claim 16, characterized in that the coating has a density of below 70% of the theoretical density of the material forming the coating.
14-15. (canceled)
A gasket assembly having a gasket coating comprising:
- chemically exfoliated vermiculite wherein at least 90 weight percent of the vermiculite has a thickness of less than or equal to 30 microns and no dimension is greater than 1 millimeter;
- a high temperature organic resin that is heat resistant to at least 300 degrees Celsius;
- a supplementary inorganic resin;
- and
- a flaky filler.
A seal-enhancing coating for a gasket comprising a mixture of:
- chemically exfoliated vermiculite wherein at least 90 weight percent of the vermiculite has a thickness of less than or equal to 30 microns and no dimension is greater than 1 millimeter;
- a high temperature organic resin that is heat resistant to at least 300 degrees Celsius;
- a supplementary inorganic resin;
- and
- a flaky filler.
Dependencies are inferred from the claim text.