SILICONE RUBBER COMPOSITION AND METHOD FOR IMPROVING STEAM-PROOF PROPERTY OF SILICONE RUBBER-MOLDED ARTICLE

摘要

PROBLEM TO BE SOLVED: To provide a silicone rubber composition having a good mold-releasing property on molding without decreasing the steam-proof property original to the silicone rubber, and a method for improving the mold-releasing property and steam proof property of the silicone rubber-molded article by using the composition.;SOLUTION: This silicone rubber composition for molding by using a mold is provided by containing (A) an organopolysiloxane expressed by formula (1): R_nSiO_(4-n)/2 [wherein, Rs are the same or different and are each (non)substituted monovalent hydrocarbon group; and (n) is a positive number of 1.95 to 2.04] and containing ≥2 alkenyl groups in one molecule, (B) a reinforcing silica having ≥50 m²/g specific surface area, (C) an organic compound-based mold-releasing agent, (D) an alkaline substance selected from an alkali metal hydroxide, alkali metal oxide, alkali metal fatty acid salt, alkali metal alcoholate and alkali metal siliconate, and (E) a curing agent.;COPYRIGHT: (C)2011,JPO&INPIT