Silicone composition which can be crosslinked into an adhesive and cushioning gel with microspheres

Silicone composition which can be crosslinked by hydrosilylation into an adhesive and cushioning gel, characterized in that it comprises:

• (I)—at least one polyorganosiloxane POS (I) comprising:
• end siloxyl units of type M=(R)2(Hrf)SiO1/2 with:
• R identical to or different from one another and corresponding to a linear or branched C1-C6 alkyl group and/or an aryl group which may or may not be substituted,
• Hrf corresponding to at least one type of Hydrosilylation reactive functional group, hydro or alkenyl, vinyl being one of the preferred alkenyls, and
• identical or different siloxyl units of type D=(R1)p(Hrf)qSiO2/2, in which Hrf is as defined above, R1 corresponds to the same definition as R and p=1 or 2, q=0 or 1 and p+q=2,
• (II)—at least one polyorganosiloxane POS (II) comprising:
• end siloxyl units M=(Hrf)s(R2)tSiO1/2 with:
• Hrf as defined above,
• R2 corresponding to the same definition as R,
• s=0, 1, 2 or 3 and t=0, 1, 2 or 3 and s+t=3
• identical or different siloxyl units D=(Hrf)u(R3)vSiO2/2 with:
• Hrf as defined above,
• R3 corresponding to the same definition as R,
• u=0, 1 or 2, v=0, 1 or 2 and u+v=2;
• with the condition according to which at least one of the D units of the POS (II) carries an Hrf (u=1, v=1)
• (III)—at least one adhesion promoter (III),
• (IV)—organic hollow microspheres,
• (V)—optionally at least one polyorganosiloxane POS (V) which is of use in particular as diluent of the POS (I) and which comprises end siloxyl units M=(R6)3SiO1/2 and siloxyl units D=(R7)2SiO2/2 with R6 and R7 identical to or different from one another and corresponding to the same definition as R,
• (VI)—and an effective amount of hydrosilylation catalyst, preferably of platinum nature.