Patent ID: 8217122
Filing Date: 2012-07-10
Classification: C08G,C08J,C08K,C08L

Abstract:
1. A silicone rubber powder obtained by curing a condensation-curable silicone rubber composition in a dispersed state in water, the powder having an epoxy equivalent measured by titration equal to or lower than 3,000 and an average particle size in the range of 0.1 to 100 μm, wherein the condensation-curable silicone rubber compostition comprises the following components (A) through (D): (A) a diorganopolysiloxane capped at both molecular terminals with silanol groups and having in one molecule 30 or less silicon atoms; (B) an organopolysiloxane having in one molecule at least two silicon-bonded hydrogen atoms wherein the mole number of silicon-bonded hydrogen atoms contained in this component becomes equal to or lower than 80% of the mole number of silanol groups in component (A); (C) an epoxy-containing alkoxysilane wherein the mole number of silicon-bonded alkoxy groups contained in this component becomes equal to or greater than 40% of the mole number of silanol groups remaining after subtraction of the mole number of the silicon-bonded hydrogen atoms of component (B) from the mole number silanol groups of component (A); and (D) a condensation-reaction catalyst used in an amount of 0.01 to 5 parts by weight per 100 parts by weight of the sum of components(A) to (C).