METHOD FOR PRODUCING A SEALED RELEASE COATING APPLIED ON A CYLINDER-HEAD GASKET USING A SILICONE MATERIAL

摘要

The invention concerns a method for producing a sealed impregnation and/or release coating of flat joints, in particular of cylinder-head gaskets such as composite seals, metallic joints and multi-layered steel joints. The invention uses a silicone composition necessarily comprising: at least a polyorganosiloxane A crosslinkable by cationic and/or radical process by appropriate crosslinking functional groups, for example of the alkenylether, acrylic, acrylate, epoxide and/or oxethane type; at least an initiator salt B selected among onium borates or an organometallic complex; and at least a reactive diluent C consisting in a non-organosilicon or organosilicon compound comprising in its structure at least a crosslinking functional group and optionally a secondary functional group different from the crosslinking functional group but capable of chemically reacting with a crosslinking functional group, for example of the hydroxyl, alkoxy and/or carboxyl type. In the method, the silicone composition may further contain different additives such as: a pigment D and/or a mineral filler E and/or a photosensitizer F and/or a stabilising amino compound G and/or an adherence promoter H.