| 摘要 |
This invention is directed to a polymeric composition comprising (a) a continuous phase of a cross-linked organosilicon polymer comprised of alternating (i) polycyclic hydrocarbon residues derived from polycyclic polyenes having at least two non-aromatic, non-conjugated carbon-carbon double bonds in their rings and (ii) residues derived from the group consisting of cyclic polysiloxanes and tetrahedral siloxysilanes, linked through carbon to silico n bonds, and (b) a discontinuous phase of a low molecular weight hydrocarbon elastomer having at least two hydrosilation readable carbon-carbon double bonds. In addition, this invention is directed to a prepolymer composition comprising (a) a hydrosilation cross-linkable organosilicon prepolymer which is the partial reaction product of (i) polycyclic polyenes having at least two non-aromatic, non-conjugated hydrosilation reactive carbon-carbon double bonds in their rings and (ii) cyclic polysiloxanes or tetrahedral siloxsilan es having at least two hydrosilation reactive .ident.SiH groups wherein at leas t one of (i) or (ii) has at least three reactive groups, and (b) hydrocarbon elastome r having at least two hydrosilation readable carbon-carbon double bonds.</SDOA B>
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