| 摘要 |
A method is provided that can very rapidly produce a liquid silicone rubber base in which even microfine electrically conductive filler with specific surface of at least 0.5 m2/g will be homogeneously dispersed in liquid organopolysiloxane without small lump or clump formation.The method for the continuous preparation of liquid silicone rubber base, including the steps ofcontinuously supplying to a continuous mixing apparatus(A) 100 weight parts polyorganosiloxane that has a viscosity at 25° C. of 100 to 500,000 mPa.s comprising at least 2 silicon-bonded alkenyl groups in each molecule,(B) 0 to 200 weight parts electrically nonconductive inorganic filler, and(C) 0.1 to 700 weight parts electrically conductive filler with a specific surface of at least 0.5 m2/gwherein the combined quantity of components (B) and (C) is from 5 to 700 weight parts where the continuous mixing apparatus has a cylindrical body casing with a material feed opening at the top of the body casing, a mixture discharge outlet at the bottom of the body casing, and a rotating disk within the casing such that the ratio of the diameter of the rotating disk to the inside diameter of the cylindrical body casing is 0.80 to 0.95;mixing components (A) through (C) therein by the rotation of the rotating disk to form a mixture; anddischarging the mixture through the said discharge outlet.
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