Patent ID: 8153718

Claim:
A polyorganosiloxane composition heat-vulcanizable into silicone elastomeric state, consisting essentially of: 100 parts by weight of at least one polyorganosiloxane gum (a); 15 to 100 parts of a reinforcing filler or fillers (b); 0.2 to 8 parts of an organic peroxide (c); 0.2 to 10 parts of zinc oxide (d); 0.1 to 15 parts of calcium oxide (e); 0 to 15 parts of an auxiliary additive or additives (f); 0. 0001 to 0.02 parts of a platinum ingredient (g) expressed by weight of platinum metal; 10 to 100 parts of packing filler or fillers (i); and 0.5 to 10 parts of wollastonite group (j).