Process of coagulating carbon blacksynthetic rubber latex masterbatches

Claim 1

A PROCESS FOR PREPARING A CARBON BLACK-SYNTHETIC RUBBER MASTERBATCH WHICH COMPRISES: PROVIDING A SYNTHETIC RUBBER LATEX PREPARED BY THE EMULSION POLYMERIZATION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A CONJUGATED DIOLEFIN AND A CONJUGATED DIOLEFIN WITH AT LEAST ONE ADDITIONAL MONOMER POLYMERIZABLE THEREWITH IN WHICH THE POLYMERIZATION IS CONDUCTED IN THE PRESENCE OF AT LEAST ONE EMULSIFIER SELECTED FROM THE GROUP CONSISTING OF ROSIN ACID SOAP AND FATTY ACID SOAP, ADDING TO SAID LATEX AN AQUEOUS DISPERSION OF CARBON BLACK CONTAINING AN ACID CAPABLE OF CAUSING THE COAGULATION OF A LATEX OF THE TYPE DESCRIBED, SAID ACID CONCENTRATION BEING SUCH AS TO MAINTAIN A PH DURING COAGULATION OF SAID LATEX OF ABOUT 2.5TAIN A PH DURING COAGULATION OF SAID LATEX OF ABOUT 2.53.0; SUBJECTING THE RESULTANT MIXTURE TO CONCURRENT AGITATING AND COMMINUTING ACTIONS WHEREBY SAID LATEX AND CARBON BLACK ARE SUBSTANTIALLY COMPLETELY COAGULATED AS A CARBON BLACK-SYNTHETIC RUBBER COAGULUM COMPRISING PARTICLES OF SUBSTANTIALLY UNIFORM SIZE AN SUBSTANTIALLY FREE OF FINES; AND RECOVERING SAID CARBON BLACK-SYNTHETIC RUBOF FINES; AND RECOVERING SAID CARBON BLACK-SYNTHETIC RUBBER COAGULUM.