Federal-mogul World Wide, Inc.

Federal-mogul Corporation

Kerry C Smith

Bhawani S Tripathy

Ute Rueger

Thomas Hemmrich

Richard E Dewald

Timo Walz

The subject invention provides a gasket for sealing multiple fluids and a method of forming the gasket. The gasket includes a carrier, a first elastomeric material, and a second elastomeric material different than the first elastomeric material. The first and second elastomeric materials are disposed in contact with the carrier in a flowable state such that the first and the second materials flow together to form a third elastomeric material comprising a mixture of the first and second elastomeric materials. The first and second elastomeric materials include cure systems that are compatible to ensure sufficient bonding within the third elastomeric material. Adhesive materials that are compatible with each of the first, second, and third elastomeric materials and the carrier are used to bond the elastomeric materials to the carrier.

Gasket for sealing multiple fluids

A method for reducing fuel permeation through gasketed joints in an internal combustion engine () includes surface treating the gaskets in a halogenated medium before placing them into service. A low-cost elastomer such as acrylic, EPDM or HNBR, can be used for the gasket body. The halogenated medium may comprise either a liquid bath or a gaseous bath, into which the gasket is immersed. The halogenated medium bath is excited by heating to accelerate the halogenation process. A gasket treated according to this invention possesses a chemically altered exterior surface which substantially enhances its fuel permeability resistance at relatively low cost.

Gasket containing fuel permeation barrier

Elastomers are securely bonded to metal substrates using an aqueous adhesive solution containing a silane adhesive in combination with a phosphonium quaternary salt additive. The additive concentration is preferably between 15% and 40% of the silane concentration. The concentration of the silane and additive in the water base is preferably 2.7%, on a weight basis.

Growing community of inventors

Ann Arbor, MI, United States of America

Kerry C Smith