Stable polyurethane rubbers

Claim 1

THE COMPOSITION COMPRISING A MIXTURE OF THE PRODUCT OF REACTION UNDER ANHYDROUS CONSITIONS OF ABOUT ONE MOLE OF A POLYMERIC DIOL HAVING A MOLECULAR WEIGHT OF FROM 150 TO 10,000 SELECTED FROM THE GROUP CONSISTING OF A LINEAR POLYESTER GLYCOL RESULTING FROM THE ESTERIFICATIONCONDENSATION OF A DICARBOXYLIC ACID WITH AN EXCESS OF A GLYCOL SAID POLYESTER HAVING AN ACID NUMBER OF LESS THAN 10 AND A POLYETHER GLYCOL SAID POLYMERIC DIOL BEING FUTHER CHARACTERIZED IN THAT ONE MOLE OF SAID POLYMERIC DIOL WILL REACT WITH 1.7 MOLES OF P-PHENYLENE DIISOCYANATE UNDER ANHYDROUS CONDITIONS UNDER A CONSTANT 100* C. EXTERNAL SOURCE OF HEAT TO GIVE A FLUID PRODUCT BY AN EXOTHERMIC REACTION WHICH NEVER EXCEEDS 110* C. AND MORE THAN 1.3 MOLES OF AN ORGANIC DIISOCYANATE WITH FROM ABOUT 0.0002 TO ABOUT 0.001 PART BY WEIGHT PER ONE HUNDRED PARTS BY WEIGHT OF SAID POLYMERIC DIOL OF THE ALKALI METAL SALT OF AN ORGANIC ACID CONFORMING TO THE STRUCTURE R4 (COOM)X WHEREIN R4 REPRESENTS A HYDROCARBON RADICAL HAVING FROM 1 TO 8 CARBON ATOMS, M REPRESENTS A NON-HYDRATED ALKALI METAL AND X IS A WHOLE NUMBER OF FROM 1 TO 2 AND FROM 0.2 TO 0.65 MOLE OF A COMPOUND CONFORMING TO THE STRUCTURE R5(OH)Y WHEREIN R5 REPRESENTS A HYDROCARBON RADICAL HAVING FROM 3 TO 8 CARBON ATOMS AND Y IS A WHOLE NUMBER OF FROM 2 TO 4.