Reinforced rubber compositions

Claim 1

IN A RUBBER COMPOSITION COMPRISING CIS-14 POLYISOPRENE CURABLE OF VULCANIZABLE TO AN ELASTOMER AND A SUITABLE CURING OR VULCANIZING AGENT, THE IMPROVEMET WHICH COMPRISES 5-150 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF SAID POLYISOPRENE OF A STRENGTHENING FILLER COMBINATION WHEREIN THE AMOUNT OF EACH FILLER COMPONENT USED IS25-75 PERCENT THE WEIGHT OF EACH INDIVIDUAL COMPONENT WHICH WOULD BE REQUIRED WHEN USED ALONE TO GIVE A DESIRE HARDNESS TO THE CURRED ELASTOMER, SAID STRENGTHENING FILLER COMPRISING: A. 25-74 PERCENT OF SAID REQUIRED WEIGHT OF AN ORGANOMINERAL POLYMERIC MATERIAL CONSISTING ESSENTIALLY OF A SILICEOUS MINERAL TWO-DIMENSIONAL FRAMEWORK OF A PHYLLOSILICATE HAVING AT LEAST A TETRAHEDRAL LAYER CONSISTING ESSENTIALLY OF SILICON AND OXYGEN AND AN OCTAHEDRAL LAYER CON-SISTING ESSENTIALLY OF OXYGEN AND METALLIC ATOMS OTHER THAN SILICON, AND ORGANIC RADICALS HAVING TWO TO 12 CARBON ATOMS HAVING AT LEAST ONE ETHYLENIC DOUBLE BOND LINKED BY SI-O-SI SILOXANE BONDS TO SAID TETRAHEDRAL LAYER OF SAID PHYLLOSILICATE, AT LEAST 5 PERCENT BY WEIGHT OF THE METALLIC ATOMS HAVING BEEN REMOVED FROM THE OCTAHEDRAL LAYER OF THE PHYLLOSILICATED AND SUBSTITUTED BY SAID ORGANIC RADICALS, 1 TO 30 PERCENT OF THE SILICON ATOMS OF SAID TETRAHEDRAL LAYER OF SAID PHYLLOSILICATE HAVING SAID ORGANIC RADICALS GRAFTED ON THEM BY SI-O-SI BONDS, AND CONTAINING 0.2-20 WT. PERCENT GRAFTED CARBON, AND B. CORRESPONDINGLY 75-25 PERCENT OF SAID REQUIRED WEIGHT OF CARBON BLACK, AILICA OR MIXTURES THEREOF.