Synthetic rubber latex prepared using polyoxyethylated castor oil and anionic dispersing agents

Claim 1

IN THE METHOD OF MAKING A SYNTHETIC RUBBER LATEX BY SUBJECTING TO POLYMERIZING CONDITIONS AN AQUEOUS EMULSION OF POLYMERIZABLE SYNTHETIC RUBBER FORMING MONOMERS CONTAINING 3 TO 10 PARTS OF ANIONIC SURFACE-ACTIVE DISPERSING AGENT PER 100 PARTS OF POLYMERIZABLE MONOMERS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF POLYOXYETHYLATED CASTOR OIL, THE AMOUNT OF SAID POLYOXYETHYLATED CASTOR OIL BEING FROM 0.004 TO 2 PARTS PER 100 PARTS OF THE ORIGINAL RUBBER FORMING MONOMERS, SAID SYNTHETIC RUBBER FORMING MONOMERS BEING SELECTED FROM THE GROUP CONSISTING OF BUTADIENE-1,3, ISOPRENE, 2,3-DIMETHYLBUTADIENE-1,3, PIPERYLENE, MIXTURES OF SUCH BUTADIENES-1,3 WITH ONE ANOTHER AND MIXTURES OF SUCH BUTADIENES-1,3 WITH MONOETHYLENIC COMPOUNDS WHICH CONTAIN A CH2=C< GROUP AND ARE COPOLYMERIZABLE WITH BUTADIENES-1,3, SAID MONOETHYLENIC COMPOUNDS BEING UP TO 70% BY WEIGHT OF SUCH MIXTURES, SAID ANIONIC SURFACE-ACTIVE AGENT COMPRISING 0.2 TO 1 PART SELECTED FROM THE GROUP CONSISTING OF SULFONATED AND SULFATED SURFACE-ACTIVE AGENTS AND THE REMAINDER OF THE 3 TO 10 PARTS BEING SELECTED FROM THE GROUP CONSISTING OF WATER-SOLUBLE SOAPS OF HIGHER FATTY ACIDS AND WATER-SOLUBLE SOAPS OF ROSIN ACIDS.