| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an addition-curing type electroconductive liquid silicone rubber composition providing a silicone rubber having stable volume resistivity and little dispersion thereof even when a normal electroconductive carbon black and an inorganic filler are used. SOLUTION: A precursor composition comprising (a) an alkenyl group-containing organopolysiloxane having 5,000-80,000 weight average molecular weight, (b) the electroconductive carbon black and (c) an inorganic filler is previously produced by subjecting a formulation comprising a part or the whole of the component (a), and components (b) and (c) to a step for dispersing the formulation by ultrasound, and a step for dispersing the formulation by a three roll mill when producing the addition-curing type electroconductive liquid silicone rubber composition comprising the components (a) to (c), and (d) an organohydrogenpolysiloxane and (e) a hydrosilylation catalyst. The objective composition is produced by compounding the remainder of the component (a) if present, and the components (d) and (e) with the precursor composition. COPYRIGHT: (C)2008,JPO&INPIT
|
