| 摘要 |
Organosilicon prepolymer compositions which are the reaction products of (a) at least one of cyclic polysiloxanes or tetrahedral siloxysilanes containing at least two 3BOND SiH groups and (b) polycyclic polyenes having at least two non-aromatic, non-conjugated carbon-carbon double bonds in their rings, wherein the total ratio of the non-aromatic, non-conjugated carbon-carbon double bonds in the rings of (b) to 3BOND SiH groups in (a) in greater than 1.8:1 and either the 3BOND SiH containing compounds (a) or the polycyclic polyenes (b) have more than two reactive sites. The organosilicon compositions are blended with (c) at least one of additional cyclic polysiloxanes, additional tetrahedral siloxysilanes or linear, short chain 3BOND SiH terminated polysiloxanes to make fluid hydrosilation compositions. These storable blends are polymerized to thermally stable thermoset polymers.
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