| abstract |
The present invention relates to a crosslinkable adhesive silicone composition, as well as the use of this composition for bonding various substrates. The silicone compositions considered are of the type of those comprising a polyorganosiloxane (POS) containing Si-Vi units (alpha, omega-di-Vi polydimethylsiloxane); a crosslinking POS with SiH units, a platinum catalyst, an adhesion promoter comprising vinyltrimethoxysilane, 3-glycidoxy-propyltrimethoxysilane and butyl titanate; and optionally a filler and / or a crosslinking inhibitor and / or an unsaturated POS resin of the MMVi DDVi Q or MDVi Q type. The aim of the invention is to provide a glue of this type which is strongly adherent and having, before crosslinking, a low viscosity suitable for easy application to the substrates to be bonded. The invention satisfies this aim by proposing a crosslinkable silicone adhesive composition of the type of that defined above and characterized by a peel force Fp> = 0.25 N / mm, a viscosity eta 50.103 mPa.s at 25degre, a tear strength Rd> = 6 / mm (ASTM-624A) and a shore hardness A> = 35. The present invention also relates to the use as adhesive of the above-mentioned composition. |