Process of heat-reacting butyl rubber and an oxy-carbon black, product obtained thereby and vulcanized product of same

Claim 1

A PROCESS WHICH COMPRISES MIXING ABOUT 20 TO 200 PARTS BY WEIGHT OF AN OXY-CARBON BLACK WITH ABOUT 100 PARTS BY WEIGHT OF A LOW UNSATURATION RUBBERY ISOOLEFINMULTIOLEFIN SYNTHETIC COPOLYMER HAVING A STAUDINGER MOLECULAR WEIGHT BETWEEN ABOUT 20,000 AND 200,000 AND A WIJS IODINE NUMBER OF ABOUT 1 TO 50 AND HEATING THE MIXTURE FORMED, IN THE ABSENCE OF AGENTS EFFECTING VULCANIZATION DURING SAID HEATING, TO A TEMPERATURE LEVEL AT LEAST WITHIN THE RANGE OF BETWEEN ABOUT 250-450*F., BUT BELOW THE DECOMPOSITION TEMPERATURE OF THE COPOLYMER FOR A TIME OF ABOUT 10 MINUTES TO 7 HOURS, SAID TIME CORRESPONDING APPROXIMATELY TO ABOUT 1 TO 7 HOURS AT A TEMPERATURE OF ABOUT 250*F. WITHOUT AGITATION AND ABOUT 10 MINUTES TO 1 HOUR AT A TEMPERATURE OF ABOUT 450*F. WITH AGITATION, AND UNTIL THE INTERNAL VISCOSITY IS DECREASED BETWEEN ABOUT 20 AND 60%, WHEREBY THE PHYSICAL PROPERTIES OF THE RESULTING MIXTURE AFTER CURING ARE IMPROVED.