| 摘要 |
Compositions which comprise (A) a polymeric organosilicon compound having 1 to 6 Si-bonded hydrogen atoms per molecule, (B) a polymeric organosilicon compound having at least two alkenyl groups per molecule and a viscosity of not more than 100 mm2/s, (C) a polymeric organosilicon compound having on average at least 10 Si-bonded hydrogen atoms per molecule, (D) a catalyst and, optionally (E) an inhibitor, with the proviso that the molar ratio of all the Si-bonded hydrogen atoms to all the SiC-bonded alkenyl groups in the composition is on average less than 1, the composition comprises (B) in an amount such that the composition comprises on average at least 1.1 alkenyl radicals of (B) per Si-bonded hydrogen atom of (A) and the content of Si-bonded hydrogen atoms of (C) is 5% to 50%, based on the number of all the Si-bonded hydrogen atoms present.
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