Silicone-thermoplastic polymer reactive blends and copolymer...

C - Chemistry – Metallurgy – 08 – G

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C08G 77/06 (2006.01) C08G 77/442 (2006.01) C08L 23/00 (2006.01)

Patent

CA 2732755

Silicone-thermoplastic polymer reactive blends and copolymer products are prepared using economical post-reactor reactive mixing, e.g., extrusion. The procedure is based on the ring-opening polymerization of cyclic siloxanes within a thermoplastic polymer matrix. In a preferred mode, the thermoplastic polymer is a polyolefin, optionally containing silane groups that are available for reaction with the silicone polymer that is formed in situ. The resulting materials provide hybrid performance that can extend the range of applications beyond those which are served by thermoplastic polymers or silicones alone, or their physical blends.

Linvention concerne des mélanges réactifs de polymères silicone-thermoplastique et des produits copolymères qui sont préparés à laide dun mélangeage réactif post-réacteur économique, par exemple une extrusion. La procédure se fonde sur la polymérisation par ouverture de cycle de siloxanes cycliques au sein dune matrice polymère thermoplastique. Dans un mode préféré, le polymère thermoplastique est une polyoléfine contenant éventuellement des groupes silanes qui sont disponibles pour une réaction avec le polymère de silicone qui est formé in situ. Les matériaux résultants fournissent une performance hybride qui peut élargir la gamme des applications au-delà de celles qui utilisent les polymères thermoplastiques ou les silicones seuls, ou leurs mélanges physiques.

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