Synthetic polymers

Claim 1

A PROCESS FOR PRODUCING A SHAPED, VULCANIZED ELASTOMER, WHICH COMPRISES ADMIXING (1) A STABLE, UNVULCANIZED ELASTOMER OBTAINED BY THE REACTION OF (A) AN ISOCYANAE MODIFIED POLYESTER PREPARED FROM AN ANHYDROUS, SUBSTANTIALLY LINEAR DICARBOXYLIC ACID-DIHYDRIC ALCOHOL-POLYCONDENSATION PRODUCT HAVING AS SOLE REACTIVE GROUPS TERMINAL GROUPS CONSISTING PREDOMINANTLY OF ALCOHOLIC HYDROXYL GROUPS AND HAVING A HYDROXYL VALUE BETWEEN ABOUT 20 AND ABOUT 80 WITH AN EXCESS OF FROM ABOUT 20 TO ABOUT 250 PER CENT OF AN ORGANIC DIISOCYANATE WHOSE SOLE REACTIVE GROUPS ARE ISOCYANATE GROUPS, SAID EXCESS BEING CALCULATED ON THE AMOUNT NECESSARY FOR COMBINING SAID ISOCYANATE GROUPS WITH SAID HDYROXYL GROUPS, WITH (B) AN AMOUNT AT LEAST EQUIVALENT TO THE FREE ISOCYANATE GROUPS PRESENT IN (A) OF A POLYFUNCTIONAL COMPOUND WHOSE SOLE REACTIVE GROUPS ARE AT LEAST TWO RADICALS SELECTED FROM THE CLASS CONSISTING OF ALCOHOLIC HYDROXYL AND PRIMARY AND SECONDARY AMINO GROUPS, WITH (2) AN ORGANIC POLYISOCYANATE WHOSE SOLE REACTIVE GROUPS ARE AT LEAST TWO ISOCYANATE GROUPS, AND THEN MOLDING THE MIXTURE IN A HEATED PRESS.