Preparation of synthetic rubbercarbon black mixtures using the residue from the alkali extraction of bark

Claim 1

THE PRODUCT OF THE CO-COAGULATION OF SOLIDS FROM SUSPENSION IN AN AQUEOUS MEDIUM COMPRISING A MIXTURE OF A SYNTHETIC RUBBER LATEX EMULSION POLYMERIZATE OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF BUTADIENE-1,3 HYDROCARBONS, CHLORO-2-BUTADIENE-1,3, MIXTURES THEREOF, AND MIXTURES OF SUCH BUTADIENES-1,3 WITH UP TO 70% OF SAID MIXTURE OF MATERIAL WHICH CONTAINS A SINGLE CH2=C< GROUP SAND IS COPOLYMERIZABLE WITH SUCH BUTADIENES-1,3, AND AN AQUEOUS SLURRY OF CARBON BLACK, AND THE WET CELLULOSIC RESIDUE SEPARATED FROM THE LIQUID ALKALI EXTRACT OF AN ALKALI EXTRACTION OF COMMINUTED BARK OF A TREE OF THE GROUP CONSISTING OF DOUGLAS FIR, REDWOOD AND GUNWOOD, THE AQUEOUS MEDIUM OF THE SUSPENSION BEING FREE FROM THE ALKALI EXTRACT SEPARATED FROM THE BARK RESIDUE, THE BARK RESIDUE BEING IN AMOUNT FROM 5 TO 50 PARTS PER 100 PARTS OF THE SYNTHETIC RUBBER AND THE CARBON BLACK BEING IN AMOUNT FROM 30 TO 100 PARTS PER 100 PARTS OF THE SYNTHETIC RUBBER.