| abstract |
By incorporatingn (A) a saturated hydrocarbon polymer having more than onenalkenyl group capable of being hydrosilylated in each moleculenand having a molecular weight of 2,000 to 50,000, (B) a component comprising a compound containing more than twonsilicon atom-bound hydrogen atoms, on average, in eachnmolecule, (C) a compound having, within the molecule, one alkenyl groupncapable of being hydrosilylated, (D) a compound having, within the molecule, at least twonalkenyl groups capable of being hydrosilylated and having anmolecular weight less than 2,000, and (E) a hydrosilylation catalyst, na composition having good mechanical characteristics, anhigh gel fraction and a small heating loss can be obtained. Asna result, the invention can provide a composition to secure thenuniformity within a wide range of selection not depending onnits viscosity, because it is markedly relaxed the restrictionnon SiH-containing compounds that are curing agents possiblynbecoming a cause of said insufficient curing. |