Patent ID: 8729208
Filing Date: 2014-05-20
Classification: C08G,C08L,G02F,H01L

Abstract:
1. A curable composition that comprises: (A) a linear organosiloxane compound represented by an average composition formula of Formula 1, of which a viscosity at 25° C. is from 1,000 mPa·s to 100,000 mPa·s and has a weight average molecular weight from 1,000 to 50,000, and of which a molar ratio of an alkenyl group having 2 to 12 carbon atoms and bound to a silicon atom with respect to the total silicon atoms ranges from 0.02 to 0.2; (B) a crosslinking type organosiloxane compound represented by an average composition formula of Formula 2, of which a viscosity at 25° C. is 5,000 mPa·s or more and has a weight average molecular weight from 1,000 to 5,000, and of which a molar ratio of an alkenyl group having 2 to 12 carbon atoms and bound to a silicon atom with respect to the total silicon atoms ranges from 0.15 to 0.35; and (C) a hydrogen siloxane compound represented by Formula 3, of which a viscosity at 25° C. is 300 mPa·s or less and has a molecular weight of less than 1,000, and of which a molar ratio of a hydrogen atom bound to a silicon atom with respect to the total silicon atoms ranges from 0.2 to 0.8, wherein a molar ratio of a hydrogen atom bound to a silicon atom in the siloxane compound (C) with respect to an alkenyl group bound to a silicon atom in the organosiloxane compounds (A) and (B) is in the range from 0.8 to 1.2, and wherein the curable composition satisfies the Equations 1 and 2: wherein R wherein X