Method of making rubbery compounds suitable for production of tire treads

Claim 1

A METHOD OF PREPARING A PLASTIC FHETEROGENEOUS COMPOUNDS FOR THE PRODUCTION OF TIRE TREADS AND THE LIKE WHICH COMPRISES INCORPORATING CARBON BLACK INTO A LATEX OF A VULCANIZABLE WATERINSOLUBLE POLYMER, COAGULATING THE MIXTURE THUS OBTAINED TO FORM A PLASTIC COMPOUND HAVING A BASE OF SAID POLYMER AND CONTAINING SUBSTANTIAL AMOUNTS OF CARBON BLACK, SEPARATELY FORMING A CONTINUOUS PHASE OF MORE PLASTIC MATRIX COMPOUND HAVING A BASE OF A VULCANIZABLE WATERINSOLUBLE POLYMERIC MATERIAL AND ALSO CAPABLE OF BEING VULCANIZED TO A SOFT RUBBERY STATE, DISPERSING PARTICLES OF THE SEPARATELY MIXED LESS PLASTIC COMPOUND INTO A CONTINUOUS PHASE OF SAID MORE PHASE MATRIX COMPOUND, AND MASTICATING THE RESULTANT MIX TO CAUSE BLENDING OF THE INTERFACE BETWEEN PARTICLES OF THE LESS PLASTIC COMPOUND AND SAID MATRIX COMPOUND, BOTH OF SAID COMPOUNDS WHEN VULCANIZED BEING CHARACTERISTIC OF A SOFT VULCANIZED, AS DISTINGUISHED FROM A HARD VULCANIZED, RUBBER COMPOUND, THE AMOUNT OF CARBON BLACKS PRESENT IN THE LESS PLASTIC OF SAID COMPOUNDS BEING GREATER THAN THE AMOUNT IN SAID MORE PLASTIC COMPOUND, SAID POLYMER AND SAID POLYMERIC MATERIAL BEING SELECTED FROM MEMBERS OF THE GROUP CONSISTING OF PLASTIC NATURAL RUBBER AND POLYMERS OF A CONJUGATED DIOLEFINIC COMPOUND HAVING LESS THAN 8 CARBON ATOMS, THE DIFFERENCE BETWEEN PLASTICITIES OF SAID COMPOUNDS BEING AT LEAST 20 POINTS ON A MOONEY PLASTOMETER.

Claim 2

A METHOD OF PREPARING A PLASTIC FHETEROGENEOUS COMPOUNDS FOR THE PRODUCTION OF TIRE TREADS AND THE LIKE WHICH COMPRISES INCORPORATING CARBON BLACK INTO A LATEX OF A VULCANIZABLE WATERINSOLUBLE POLYMER, COAGULATING THE MIXTURE THUS OBTAINED TO FORM A PLASTIC COMPOUND HAVING A BASE OF SAID POLYMER AND CONTAINING SUBSTANTIAL AMOUNTS OF CARBON BLACK, SEPARATELY FORMING A CONTINUOUS PHASE OF MORE PLASTIC MATRIX COMPOUND HAVING A BASE OF A VULCANIZABLE WATERINSOLUBLE POLYMERIC MATERIAL AND ALSO CAPABLE OF BEING VULCANIZED TO A SOFT RUBBERY STATE, DISPERSING PARTICLES OF THE SEPARATELY MIXED LESS PLASTIC COMPOUND INTO A CONTINUOUS PHASE OF SAID MORE PHASE MATRIX COMPOUND, AND MASTICATING THE RESULTANT MIX TO CAUSE BLENDING OF THE INTERFACE BETWEEN PARTICLES OF THE LESS PLASTIC COMPOUND AND SAID MATRIX COMPOUND, BOTH OF SAID COMPOUNDS WHEN VULCANIZED BEING CHARACTERISTIC OF A SOFT VULCANIZED, AS DISTINGUISHED FROM A HARD VULCANIZED, RUBBER COMPOUND, THE AMOUNT OF CARBON BLACKS PRESENT IN THE LESS PLASTIC OF SAID COMPOUNDS BEING GREATER THAN THE AMOUNT IN SAID MORE PLASTIC COMPOUND, SAID POLYMER AND SAID POLYMERIC MATERIAL BEING SELECTED FROM MEMBERS OF THE GROUP CONSISTING OF PLASTIC NATURAL RUBBER AND POLYMERS OF A CONJUGATED DIOLEFINIC COMPOUND HAVING LESS THAN 8 CARBON ATOMS, THE DIFFERENCE BETWEEN PLASTICITIES OF SAID COMPOUNDS BEING AT LEAST 20 POINTS ON A MOONEY PLASTOMETER.