Patent ID: 8748553
Filing Date: 2014-06-10
Classification: C08G,C08K,C08L,Y10T

Abstract:
1. An addition-crosslinking silicone composition comprising: (A) at least one diorganopolysiloxane of the formula (I) in which R R b is a value from 0.0001 to 2, with the proviso that 1.5<(a+b)≦3.0, and that per molecule there are on average at least two aliphatically unsaturated radicals R (B) at least one cyclic organohydrogenpolysiloxane of the formula (II), where R R (a) a monovalent aliphatically saturated hydrocarbon radical having 2 to 20 carbon atoms, (b) an unsubstituted or halogen-substituted monovalent hydrocarbon radical having 6 to 20 carbon atoms, which contains at least one aromatic C (c) a monovalent cycloaliphatic unsubstituted or halogen-substituted hydrocarbon radical having 3 to 20 carbon atoms, (d) a halogen-substituted, saturated, monovalent hydrocarbon radical having 2 to 20 carbon atoms, which may contain O, N, S, or P atoms, or (e) a linear, cyclic, or branched radical containing Si atoms, optionally containing one or more Si-bonded hydrogen atoms, g is a number greater than or equal to 1, and h is 0 or a positive number, with the proviso that the sum of g and h is greater than or equal to 4, (C) at least one adhesion promoter of the formula (III) where R X is independently selected from —CH Y is independently selected from carbonyl, ethers, esters, carboxylic acids, amides, acid amides, carbamates, ureas, urethanes, and alcohols, n is 0 or a positive number, p and r are each 0, 1, 2, or 3, and q is a number 0, 1, or 2, with the proviso that the adhesion promoter (C) comprises at least two C═C double bonds, and (D) at least one hydrosilylation catalyst, and (E) at least one organohydrogenpolysiloxane of the formula (IV) where R R (b) is a monovalent, unsubstituted or halogen-substituted, saturated hydrocarbon radical having 2 to 20 carbon atoms, in which individual carbon atoms are optionally replaced by O, N, S or P atoms, R c and f are positive numbers, and d and e are zero or a positive number, with the proviso that the sum (c+d+2e+f) is ≦3, the organohydrogenpolysiloxane (E) contains per molecule on average at least 3 SiH groups, the viscosity of the organohydrogenpolysiloxane (E) as determined at 25° C. is 5 mPa·s to 5000 mPa·s, and that the organohydrogenpolysiloxane (E) is not a cyclic organohydrogenpolysiloxane of the general formula (SiHR