Gasket coating

摘要

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 1mm. The particles form 10 to 90wt% of the coating. The coating also comprises 50 to 10 wt% of an organic polymer binder which when formed into a film 1mm 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 the film.