| abstract |
The present invention relates to a thermoplastic elastomer vulcanizate having two respectively thermoplastic and liquid silicone elastomer phases, and the preparation process thereof. The invention also provides a elastomer havingn a first phase (A) based on at least one thermoplastic polymer; a second phase based on at least one two-component (B1 and B2) liquid silicone elastomer crosslinked by hydrosilylation; and a system for compatibilizing these phases that includes: at least one polymer (C1) chosen from grafted polyolefins, terpolymers containing poly(vinylaromatic/conjugated diene/methyl methacrylate) blocks, terpolymers containing poly(methyl methacrylate/alkyl acrylate/methyl methacrylate) blocks, ethylene/alkyl(meth)acrylate/acrylic acid terpolymers and polymers resulting from at least one glycidyl ester; and a polyorganosiloxane (C2) with SiH functional group(s), in order to obtain a homogeneous dispersion of these phases by reactive extrusion with at least the second phase which is continuous therein, according to a particular injection sequence and particular shear and temperature conditions, this blend having improved mechanical properties. |