Patent ID: 8748293
Filing Date: 2014-06-10
Classification: C08G,C08L,C09J,H01L

Abstract:
1. An organopolysiloxane obtained by subjecting an alkenyl group-containing organopolysiloxane (A1) to a hydrosilylation reaction with a hydrosilyl group-containing compound (A2) in the presence of a platinum group metal-based catalyst; wherein the alkenyl group-containing organopolysiloxane (A1) is a non-aromatic saturated hydrocarbon group-containing organppolysiloxane containing the following units (I) to (III): (I) a siloxane unit (T unit) represented by R (II) a siloxane unit (D unit) represented by R (III) a siloxane unit (M unit) represented by R wherein: R 40 mol % or more of all the organic groups and hydrogen atoms represented by R 30 mol % or more of all the organic groups and hydrogen atoms represented by R and, the remainder of all the organic groups and hydrogen atoms represented by R wherein 2 to 30 mol % of all the organic groups and hydrogen atoms represented by R wherein the hydrosilyl group-containing compound (A2) is represented by the following average composition formula (1): wherein R wherein the hydrosilyl group-containing compound (A2) contains at least two SiH groups in one molecule, and wherein the hydrosilyl group-containing compound (A2) is such content that the total molar amount of the SiH groups is 0.4 to 1.0 times a total molar amount of the alkenyl groups contained in the alkenyl group-containing organopolysiloxane (A1).