| 摘要 |
<p>Crosslinkable silicone coating composition (I) comprises: organopolysiloxane(s) containing alkenyl groups and comprising at least one silane unit (II), at least 2 siloxane units (III) and a siloxane unit (IV), per molecule; organopolysiloxanes containing silicon-bonded hydrogen atoms; at least one catalyst which promotes the addition of silicon-bonded hydrogen to an aliphatic multiple bond; and optionally, inhibitors. Crosslinkable silicone coating composition (I) comprises: organopolysiloxane(s) containing alkenyl groups and comprising at least one silane unit of formula (O ( 3 - n / 2 )R nSi-Y 1>(SiR nO ( 3 - n / 2 ) a)) (II), at least 2 siloxane units of formula (R 1>R bSiO ( 3 - b ) / 2) (III) and a siloxane unit of formula (R cSiO ( 4 - c ) / 2) (IV), per molecule; organopolysiloxanes containing silicon-bonded hydrogen atoms; at least one catalyst which promotes the addition of silicon-bonded hydrogen to an aliphatic multiple bond; and optionally, inhibitors. a : 1-2; b : 0-2; c : 1-3; n : 0-1; R : monovalent, 1-30C SiC-bonded organic radical (optionally containing one or more non-adjacent O atoms and which is free from aliphatic carbon-carbon multiple bonds); and R 1>2-4C alkenyl radical, preferably vinyl radical; and Y 1>1-30C divalent or trivalent organic radical. Provided that the organopolysiloxanes comprise units (III) in molar amounts such that the concentration of alkenyl radicals R 1>in organopolysiloxanes is less than 2 meq/g. Independent claims are included for: (1) a molding produced by crosslinking (I); and (2) a process for producing a coating on a surface repelling tacky substances, comprising applying (I) to the surface to be coated and then crosslinking (I).</p> |
