Polyurethane collapsed foam elastomer

Claim 1

IN THE PREPARATION OF A SOLID, SUBSTANTIALLY NONPOROUS, RUBBER-LIKE POLYURETHANE ELASTOMER BY A PROCESS WHEREIN AN ORGANIC DIISOCYANATE IS REACTED WITH AN ORGANIC COMPOUND HAVING ALCOHOLIC HYDROXYL GROUPS TO FORM AN ADDUCT HAVING TERMINAL HYDROXYL GROUPS IN A FIRST STEP, AND REACTING THE ADDUCT WITH ADDITIONAL OROGANIC DIISOCYANATE TO FORM A CURED SOLID ELASTOMER, IN A SECOND STEP, THE IMPROVEMENT WHICH COMPRISES MIXING AND REACTING: (1) A POLYALKYLENE ETHER ALCOHOL HAVING FROM 2 TO 3 HYDROXYL GROUPS WITH NOT MORE THAN ABOUT 50% OF SAID POLYETHER ALCOHOL HAVING 3 HYDROXYL GROUPS, SAID POLYALKYLENE ETHER ALCOHOL HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 1,000 AND A HYDROXYL NUMBER OF NOT MORE THAN ABOUT 112; AND (2) FROM ABOUT 1% TO ABOUT 2% WATER BASED ON THE WEIGHT OF SAID POLYALKYLENE ETHER ALCOHOL WITH (3) FROM ABOUT 65% TO ABOUT 85% OF THAT AMOUNT OF AN ORGANIC DIISOCYANATE THERORETICALLY REQUIRED FOR AN -NCO GROUP TO REACT WITH EACH OF THE REACTIVE HYDROGEN ATOMS OF THE WATER AND HYDROXYL GROUPS OF THE POLYALKYLENE ETHER ALCOHOL TO FORM AN EXPANDED CELLULAR PRODUCT, SAID CELLULAR PRODUCT COLLAPSING INTO A GUM-LIKE HYDROXYL TERMINTED POLYURETHANE ADDUCT, AND THEREAFTER MIXING THE HYDROXYLTERMINATED POLYURETHANE ADDUCT WITH FROM ABOUT 6 PARTS TO ABOUT 10 PARTS ORGANIC DIISOCYANATE PER 100 PARTS OF SAID ADDUCT AND SHAPING THE RESULTING MIXTURE IN A MOLD UNTIL THE LAST SAID ORGANIC DIISOCYANTE AND GUM-LIKE MATERIAL REACT TO FORM A SOLIDIFIED, RUBBER-LIKE, SUBSTANTIALLY NONPOROUS POLYURETHANE PRODUCT.