Reaction product of a diisocyanate, a polyester and a polyalkylene ether glycol, and process of making same

Claim 1

IN THE PREPARATION OF A RUBBER-LIKE POLYUTRTHANE BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC DIISOCYANATE WITH AN ORGANIC COMPOUND HAVING HYDROGEN ATOMS REACTIVE WITH AN -NCO GROUP, THE IMPROVEMENT WHICH COMPRISES REACTING AN ORGANIC DIISOCYANATE WITH BOTH A PREDOMINATELY HYDROXYL TERMINATED POLYESTER PREPARED BY ESTERIFICATION OF A DICARBOXYLIC ACID AND DIHYDRIC ALCOHOL AND A POLYALKYLENE ETHER GLYCOL HAVING ETHER OXYGEN ATOMS WHICH ARE SEPARATED ONLY BY ALIPHATIC CARBON TO CARBON CHAINS OF FOUR CARBON ATOMS, THE AMOUNT OF POLYALKYLENE ETHER GLYCOL BEING FROM ABOUT 10 PERCENT TO ABOUT 90 PERCENT OF THE TOTAL AMOUNT OF POLYALKYLENE ETHER GLYCOL AND POLYESTER AND THE TOTAL AMOUNT OF ORGANIC DIISOCYANATE BEING SUFFICIENT TO SUPPLY AN EXCESS OF FROM ABOUT 0.1 PERCENT TO ABOUT 5 PERCENT -NCO GROUPS OVER THAT REQUIRED TO RACT WITH ALL OF THE HYDROXYL GROUPS OF THE POLYESTER AND POLYALKYLENE ETHER GLYCOL.