Preparation of rubber-protein-glyoxal composition and vulcanizable material obtained therefrom

Claim 1

A PROCESS FOR THE PRODUCTION OF A VULCANIZABLE, ROBBERY PRODUCT WHICH COMPRISES: MIXING TOGETHER AN ALKALINE DISPERSION OF A PROTEIN IN AN AQUEOUS SOLUTION OF AMMONIA AND A RUBBER LATEX HAVING A DRY MATERIAL CONTENT OF BETWEEN 15% AND 70% BY WEIGHT, SAID PROTEIN BEING SELECTED FROM THE GROUP CONSISTING OF MILK CASEIN, GELATIN, FIBRIN AND VEGETABLE PROTEINS AND SAID LATEX BEING SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER LATICES AND LATICES WHICH ARE AQUEOUS EMULSIONS OF THE ARTIFICIAL RUBBER WHICH IS THE COPOLYMERIZATION PRODUCT OF BUTADIENE WITH STYRENE IN THE PROPORTIONS BY WEIGHT OF 75:25, THE RELATIVE PROPORTIONS OF PROTEIN: DRY RUBBER: WATER BEING BETWEEN 300 AND 400 PARTS BY WEIGHT OF DRY RUBBER PER 100 PARTS BY WEIGHT OF PROTEIN AND BETWEEN 700 AND 1000 PARTS BY WEIGHT OF WATER, PER 100 PARTS BY WEIGHT OF PROTEIN, STIRRING INTO THE ALKALINE MIXTURE SO PROPORTIONED, BETWEEN 1% AND 5% BY WEIGHT OF GLYOXAL, BASED ON THE WEIGHT OF PROTEIN IN SAID MIXTURE, THEN ADDING ACETIC ACID TO THE RESULTING COMPOSITION TO LOWER THE PH OF THE COMPOSITION TO BETWEEN 3.5 AND 4.5, AND THEREBY PRODUCING A RUBBERY FLOCCULATE PRODUCT, SEPARATING THE SAID FLOCCULATE PRODUCT AND WASHING THE SEPARATED FLOCCULATE WITH WATER TO NEUTRALITY.