Curing of an isocyanato modified blend of an olefin copolymer and an unsaturated carboxylic acid

Claim 1

THE PROCESS COMPRISING BLENDING A MIXTURE OF (1) AN ELASTOMERIC COPOLYMER OF AT LEAST TWO MONOMERS CONSISTING ESSENTIALLY OF MONO-ALPHA-OLEFIN HYDROCARBONS HAVING UP TO 6 CARBON ATOMS PER MOLECULE, THE COPOLYMER BEING ESSENTIALLY FREE OF ETHYLENIC UNSATURATION, (2) 0.110% BY WEIGHT BASED ON THE COPOLYMER OF FREE RADICAL ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF ORGANIC PEROXIDES, ORGANIC HYDROPEROXIDES AND ORGANO-AZO COMPOUNDS, EACH ACTIVATOR HAVING A DECOMPOSITION TEMPERATURE BELOW 250*C., AND (3) 1-20% BY WEIGHT BASED ON THE COPOLYMER OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF UNSATURATED CARBOXYLIC ACIDS HAVING UP TO 12 CARBON ATOMS PER MOLECULE AND ANHYDRIDES THEREOF, HEATING THE MIXTURE AT A TEMPERATURE OF 100-250*C. FOR 10 MINUTES-3 HOURS UNTIL THE ACTIVATOR IS DECOMPOSED, WHEREBY AN INTERMEDIATE REACTION PRODUCT IS FORMED, AND THEREAFTER ADDING 1-50% BY WEIGHT BASED ON THE INTERMEDIATE, OF AN ORGANIC ISOCYANATE HAVING 2-3 RADICALS OF THE FORMULA -N=C=X, WHEREIN X IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF SULFUR AND OXYGEN, AND 0.01-5% BY WEIGHT BASED ON THE ISOCYANATE OF A TERTIARY AMINE CURING AGENT FOR THE MIXTURE SO FORMED.