CURABLE SILICON RUBBER COMPOSITION HAVING IMPROVED MOLD RELEASE PROPERTY AND HIGH HARDNESS

摘要

PURPOSE: A curable silicon rubber composition is provided to ensure excellent releasability of a modified epoxy resin and release durability and to minimize the hardening defects of the epoxy resin in the contact with a silicon rubber. CONSTITUTION: An addition-curable silicon rubber composition comprises: (A) organopolysiloxane which includes at least two alkenyl groups bonded to silicon atoms and at least one cyclic reactive group bonded to silicon atoms within one molecule, wherein an average polymerization degree is 2500 or less and the organopolysiloxane is a liquid-phase at a room temperature; (B) organopolysiloxane which has an average polymerization degree of 2000 or greater and is a raw rubber phase at a room temperature; (C) organohydrogenpolysiloxane including at least two hydrogen atoms bonded to silicon atoms within one molecule; (D) fumed silica; and (E) an addition reaction catalyst.