ADDITION-CURABLE LIQUID SILICONE RUBBER COMPOSITION AND CURED PRODUCT THEREOF

摘要

PURPOSE: An addition-curable liquid silicon rubber composition is provided to effectively reduce compression set while satisfying physical properties required for silicon rubber, and to maintain excellent compression set even under sever environmental condition. CONSTITUTION: An addition-curable liquid silicon rubber composition comprises polyorganosiloxane containing two or more alkenyl groups per a molecule; polyorganohydrogensiloxane containing hydrogen radical in side chain; a reinforcing silica; a catalyst for an addition reaction; and 1,2,4-triazole. The alkenyl group contained in the polyorganosiloxane component is a vinyl group. Viscosity at 25 °C of the polyorganosiloxane component is 100-150,000 mPa·s. A surface area of the reinforcing silica components by a BET method is 50-400 m^2/g.