Patent ID: 7572514

Claim:
Process for the production of an assembly comprising several silicone elements crosslinked by the polyaddition of ≡Si—H units onto ≡Si-alkenyl units, said elements adhering firmly to one another, comprising the following essential steps: (I) forming a silicone element (i) with a liquid silicone preparation (i) comprising: polyorganosiloxanes (POS) A with ≡Si-alkenyl units, polyorganosiloxanes (POS) B with ≡Si—H units, at least one metal catalyst C, optionally at least one POS resin D carrying ≡Si-alkenyl units, optionally at least one crosslinking inhibitor E, optionally at least one adhesion promoter F, optionally at least one mineral filler G, optionally at least one functional additive H for imparting specific properties, (II) crosslinking the liquid silicone preparation (i) formed in step (I), the composition of this preparation and the crosslinking conditions being chosen in such a way that the crosslinked silicone element (i) has a surface density SD of unreacted, residual alkenyl groups, per nm 2 , equal to or greater than 0.035, (III) optionally repeating steps (I) and (II) n times (n=positive integer) to give n elements (i) that adhere to one another, (IV) forming a silicone element (ii) by bringing the crosslinked silicone element or last crosslinked silicone element (i) into contact with a liquid silicone preparation (ii) comprising: polyorganosiloxanes (POS) A′ with ≡Si-alkenyl units, polyorganosiloxanes (POS) B′ with ≡Si—H units, at least one metal catalyst C′, optionally at least one POS resin D′ carrying ≡Si-alkenyl units, optionally at least one crosslinking inhibitor E′, optionally at least one adhesion promoter F′, optionally at least one mineral filler G′, optionally at least one functional additive H′ for imparting specific properties, (V) crosslinking the liquid silicone preparation (ii) formed in step (IV) to give the crosslinked silicone element (ii) that adheres to the element or last element (i).