Patent ID: 7479522

Claim:
A curable high tear strength, low hardness silicone elastomer-forming composition comprising: (A) at least two organopolysiloxanes each independently containing at least two silicon-bonded alkenyl groups per molecule, provided said at least two organopolysiloxanes (A) contain at least one substantially straight chain organopolysiloxane and at least one substantially resinous organopolysiloxane; (B) at least two organohydrogenpolysiloxanes each independently containing at least two silicon-bonded hydrogen atoms per molecule, provided said at least two organohydrogenpolysiloxanes (B) contain at least one substantially straight chain organohydrogenpolysiloxane and at least one substantially resinous organohydrogenpolysiloxane said at least two organohydrogenpolysiloxanes (B) being used in an amount such that the mole ratio of total amount of silicon-bonded hydrogen atoms contained in at least two organohydrogenpolysiloxanes (B) to silicon-bonded alkenyl groups contained in at least two organopolysiloxanes (A) is of from about 1.3 to about 2.2; (C) filler in an amount of from about 15 to about 45 parts per hundred of polyorganosiloxane (A); (D) catalyst; and, (E) inhibitor, and where combined (A)-(E) comprises a curable high tear strength, low hardness silicone elastomer-forming composition, wherein when said composition is cured it has a Shore A hardness of less than about 35.