Silicone rubber composition for making key pad and key pad

Abstract

Provided is a silicone rubber composition suited for use as a key pad having excellent dynamic fatigue durability (keying durability) and a silicone rubber key pad obtained by curing molding of the composition. A silicone rubber composition for making a key pad includes: (A) 100 parts by weight of an organopolysiloxane represented by the following average compositional formula (1): R1nSiO(4-n)/2  (1) wherein R1 is each independently the same or different and are an unsubstituted or substituted monovalent hydrocarbon group, and letter n is a positive number of 1.95 to 2.04, and having at least two alkenyl groups in one molecule; (B) 10 to 100 parts by weight of reinforcing silica having a specific surface area of at least 50 m2/g when determined by BET method; (C) 0.1 to 10 parts by weight of a vinyl group-containing alkoxysilane; (D) 0.0001 to 0.2 part by weight of hydrochloric acid, calculated as hydrogen chloride in hydrochloric acid; (E) 0.01 to 5 parts by weight of a fatty acid ester and/or a fatty alcohol ester; and (F) an effective amount of a curing agent.

Dependencies are inferred from the claim text.