Curable high hardness silicone composition and composite articles made thereof

A liquid curable silicone elastomer composition, said composition comprising:

• an organopolysiloxane (A) comprising;
• an organopolysiloxane (A1) containing at least 2 silicon-bonded alkenyl groups per molecule and having a total alkenyl content of from 0.01 to 1.5 mmol/g, and
• an organopolysiloxane (A2) containing at least 2 silicon-bonded alkenyl groups per molecule and having a total alkenyl content of from 5.0 to 15.0 mmol/g;
• an organopolysiloxane (B) comprising;
• an organopolysiloxane (B1) containing at least 2 silicon-bonded hydrogen atoms per molecule, wherein the silicon-bonded hydrogen atoms are provided in the form of siloxy units of the type (R2HSiO1/2)x where R is independently selected from hydrogen, an aliphatic hydrocarbyl, an aromatic hydrocarbyl, or an organyl group and x≥2, and
• optionally, an organopolysiloxane (B2) containing at least 2 silicon-bonded hydrogen atoms per molecule, wherein the silicon-bonded hydrogen atoms are provided in the form of siloxy units of the type (RHSiO2/2)z where R is independently selected from hydrogen, an aliphatic hydrocarbyl, an aromatic hydrocarbyl, or an organyl group and z≥2,
• wherein the molar amount of silicon-bonded hydrogen in the form of siloxy units of the type (R2HSiO1/2)x is >40 mol % of the total silicon-bonded hydrogen atoms content of organopolysiloxane (B);
• a platinum based catalyst (C);
• an inhibitor (D) selected from the group consisting of acetylenic alcohols and their derivatives;
• and
• a silica filler (E).