Patent ID: 8470950

Claim:
A method for sealing and assembling at least one component of a drive train, the method comprising the following steps a) to d): a) preparing a polyorganosiloxane composition X which is crosslinkable to elastomer by polycondensation reactions, which contains no metal catalyst, and which comprises: a silicone base B comprising at least one polyorganosiloxane oil which is crosslinkable by polycondensation reaction so as to form a silicone elastomer, and a catalytically effective amount of at least one polycondensation catalyst A which is a nonsilylated organic compound conforming to the general formula (I): in which the identical or different radicals R 1 represent independently of one another a linear or branched monovalent alkyl group, a cycloalkyl group, a (cycloalkyl)alkyl group, the cyclic moiety being substituted or unsubstituted and optionally comprising at least one heteroatom or a fluoroalkyl group, the radical R 2 represents a hydrogen atom, a linear or branched monovalent alkyl group, a cycloalkyl group, an alkyl group substituted by a cyclic moiety which is substituted or unsubstituted and optionally comprises at least one heteroatom, an aromatic group, an arylalkyl group, a fluoroalkyl group or an alkylamine or alkylguanidine group, and the radical R 3 represents a linear or branched monovalent alkyl group, a cycloalkyl group, an alkyl group which is substituted by a cyclic moiety which is substituted or unsubstituted and optionally comprises at least one heteroatom, or an arylalkyl, fluoroalkyl, alkylamine or alkylguanidine group, when the radical R 2 is not a hydrogen atom, the radicals R 2 and R 3 can be joined to form a 3-, 4-, 5-, 6- or 7-membered aliphatic cyclic moiety optionally substituted by one or more substituents, and with the further condition that the radicals R 1 , R 2 , and R 3 contain no silicon atom; b) applying said polyorganosiloxane composition X to at least one contact zone of said component, continuously or discontinuously, optionally in the form of a bead; c) causing said polyorganosiloxane composition X to crosslink to silicone elastomer in the presence of moisture provided by ambient air or by prior addition of water, so as to form a profiled gasket; and d) assembling said component to another component of the drive train, in such a way that the joint formed provides for assembly and sealing between the two components of the drive train.