Simulated vulcanizates of polyurethane elastomers

Claim 1

A TOUGH, ESSENTIALLY LINEAR POLYESTERURETHANE ELASTOMER CHARACTERIZED BY BEING THERMOPLASTIC, EXTRUDABLE, MOLDABLE, MOLTEN AT ELEVATED TEMPERATURES, SUBSTANTIALLY FREE OF CROSS-LINKS AND SUBSTANTIALLY SOLUBLE IN DIMETHYL FORMAMIDE COMPRISING THE REACTION PRODUCT OBTAINED BY HEATING A MIXTURE COMPRISING AS ESSENTIAL POLYESTURETHANE FORMING INGREDIENTS (1) ONE MOL OF AN ESSENTIALLY LINEAR HYDROXYL TERMINATED POLYESTER OF A SATURATED, ALIPHATIC GLYCOL HAVING FROM 4 TO 10 CARBON ATOMS AND HAVING HYDROXYL GROUPS ON ITS TERMINAL CARBON ATOMS AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF A DICARBOXYLIC ACID OF THE FORMULA HOOC-R-COOH WHERE R IS AN ALKYLENE RADICAL CONTAINING FROM 2 TO 8 CARBON ATOMS AND ITS ANHYDRIDE, SAID POLYESTER HAVING AN AVERAGE MOLECULAR WEIGHT BETWEEN 600 AND 1200 AND HAVING AN ACID MUNBER LESS THAN 10, AND (2) FROM ABOUT 1.11 TO 3.1 MOLS OF A DIPHENYL DIISOYANTATE HAVING AN ISOCYANATE GROUP ON EACH PHENYL NUCLEUS IN THE PRESENCE OF (3) FROM ABOUT 0.1 TO 2.1 MOLS OF A SATURATED, ALIPHATIC FREE GLYCOL CONTAINING FROM 4 TO 10 CARBON ATOMS AND HAVING HYDROXYL GROUPS ON ITS TERMINAL CARBON ATOMS. THE MOLAR AMOUNT OF SAID POLYESTER AND SAID FREE GLYCOL COMBINED BEING ESSENTIALLY EQUIVALENT TO THE MOLAR AMOUNT OF SAID DIPHENYL DIISOCYANATE WHEREBY THERE ARE ESSENTIALLY NO UNREACTED GROUP OF THE CLASS CONSISTING OF ISOCYANATE AND HYDROXYL GROUPS IN SAID REACTION PRODUCT.