Method of incorporating rosin acid in polymeric materials

Claim 1

AN IMPROVED PROCESS FOR THE PRODUCTION OF SYNTHETIC RUBBER BY COPOLYMERIZING A MONOMERIC MATERIAL COMPRISING A CONJUGATED DIOLEFIN WHILE DISPERSED IN AN AQUEOUS EMULSION, WHICH COMPRISES EFFECTING SAID POLYMERIZATIN AT A POLYMERIZATION TEMPERATURE BETWEEN -30 AND 0* C. AND WITH AN ALKALINE AQUEOUS MEDIUM AND UTILIZING AN EMULSIFYING AGENT DURING SAID POLYMERIZATION WHICH WILL REMAIN DISSOLVED IN SAID AQUEOUS MEDIUM AFTER ADDITION OF AN ACIDIC COAGULANT, ADDING TO A RESULTING LATEX AFTER A DESIRED POLYMERIZATION IS EFFECTED A ROSIN ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF FREE ROSIN ACIDS AND ALKALI METAL SALTS OF ROSIN ACIDS IN AN AMOUNT BETWEEN 1 AND 10 PARTS BY WEIGHT PER 100 PARTS OF SAID MONOMERIC MATERIAL, SUBSEQUENTLY ADDING TO SAID LATEX AN ACIDIC COAGULANT, AND RECOVERING A RESULTING ROSIN ACID-CONTAINING POLYMERIC MATERIAL SO PRODUCED.