| abstract |
An organohydrogenpoly siloxane resin having the formula (I): (R 1 R 3 2 SiO½)w(R 3 2 SiO½)x(R 1 SiO 3/2 )y(SiO 4/2 )z, wherein R 1 is C 1 to C 10 hydrocarbyl or C 1 to C 10 halogen-substituted hydrocarbyl, both free of aliphatic unsaturation, R 3 is R 1 or an organosilylalkyl group having at least one siliconbonded hydrogen atom, w is from 0 to 0.8, x is from 0 to 0.6, y is from 0 to 0.99, z is from 0 to 0.35, w+x+y+z=1, y+z/(w+x+y+z) is from 0.2 to 0.99, w+x/(w+x+y+z) is from 0.01 to 0.8, and at least 50 mol % of the groups R 3 are organosilylalkyl; a silicone composition containing the resin, and a cured silicone resin prepared by curing the silicone composition. |