| 摘要 |
<p>A hydrosilation process comprises contacting (a) a silicon hydride of formula (R1)aHbSiX4-a-b (I) and (b) an unsatd. reactant selected from (1) (un)substd. unsatd. organic cpds. and/or (2) Si cpd. (un)substd. unsatd. organic substituents in the presence of (c) a Pt catalyst selected from Pt cpds. and Pt complexes, and (d) an accelerator selected from tert. alcohols of formula (R2)3COH (II), silated tert. alcohols of formula ((R2)3CO)cSi(R1)cHdX4-c-d-e (III), benzyl alcohol and silated benzyl alcohol of formula ((C6H5)CH2O)fSi(R1)cHdX4-c-d-f (IV). R1 = 1-20C alkyl, 4-12C cycloalkyl and aryl; X = halogen or OR1; R2 = 1-20C straight chain alkyl; a = 0-3, b = 1-3, and a+b = 1-4; c, d = 0-3; c+d = 0-3; e, f = 1-4. The process is carried out with 0.1-10% stoichiometric excess of silicon hydride in respect to unsatd. carbon-carbon linkages of the unsatd. reactant. The concn. of Pt catalyst provides 1-1000 moles of Pt per 1x106 moles of unsatd. carbon-carbon bonds provided by the unsatd. reactant. The concn. of the accelerator is 0.01-20 (pref. 0.1-10)wt.% of the unsatd. reactant. The reaction is carried out at 15-170 (pref. 30-150)[deg]C.</p> |
