Polyurethane plastics

Claim 1

A METHOD FOR MAKING AN ELASTOMERIC POLYURETHANE WHICH COMPRISES FIRST PREPARING A PRELIMINARY ADDITION PRODUCT BY A PROCESS COMPRISING REACTING A POLYHYDROXYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYESTERS PREPARED FROM A GLYCOL AND POLYCARBOXYLIC ACIDS, POLY(ALKYLENE ETHER) GLYCOLS AND POLYTHIOETHER GLYCOLS, SAID POLYHYDROXYL COMPOUND HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 1000, AN HYDROXYL NUMBER OF FROM ABOUT 20 TO ABOUT 112 AND AN ACID NUMBER OF NOT MORE THAN 2, WITH AN EXCESS OF AN ORGANIC DISOCYANATE AND THEN REACTING THE RESULTING ISOCYANATE-TERMINATED ADDUCT WITH A POLYHYDRIC ALCOHOL HAVING NOT MORE THAN ABOUT 14 CARBON ATOMS AND HAVING FROM 2 TO 3 ALCOHOLIC HYDROXYL GROUPS AS ITS SOLE TERMINAL GROUPS REACTIVE WITH AN ISOCYANATE TO PRODUCT A PRODUCT HAVING A TERMINAL HYDROXYL GROUPS AND THEN REACTING THE THUS PRODUCED PRELIMINARY ADDITION PRODUCT WITH ADDITIONAL ORGANIC DISOCYANATE WHILE IN ADMIXTURE WITH A PRECURSOR OF AN AMINE ADAPTED TO SPLIT OFF AN AMINE WHEN HEATED TO A TEMPERATURE ABOVE 50* C., SAID PRECURSOR BEING SELECTED FROM THE GROUP CONSISTING OF ZINC SALTS OF SUBSTITUTED DITHIOCARBAMIC ACIDS, AND METAL SALTS OF ALKYL-SUBSTITUTED PYRIDINES, QUINALDINES, AND ACRIDINES, SAID METAL SALTS BEING SELECTED FROM THE GROUP CONSISTING OF COPPER, ZINC, LEAD, FERROUS, CALCIUM, COBALT, NICKEL AND FERROCYANIC ACID.

Claim 2

A METHOD FOR MAKING AN ELASTOMERIC POLYURETHANE WHICH COMPRISES FIRST PREPARING A PRELIMINARY ADDITION PRODUCT BY A PROCESS COMPRISING REACTING A POLYHYDROXYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYESTERS PREPARED FROM A GLYCOL AND POLYCARBOXYLIC ACIDS, POLY(ALKYLENE ETHER) GLYCOLS AND POLYTHIOETHER GLYCOLS, SAID POLYHYDROXYL COMPOUND HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 1000, AN HYDROXYL NUMBER OF FROM ABOUT 20 TO ABOUT 112 AND AN ACID NUMBER OF NOT MORE THAN 2, WITH AN EXCESS OF AN ORGANIC DISOCYANATE AND THEN REACTING THE RESULTING ISOCYANATE-TERMINATED ADDUCT WITH A POLYHYDRIC ALCOHOL HAVING NOT MORE THAN ABOUT 14 CARBON ATOMS AND HAVING FROM 2 TO 3 ALCOHOLIC HYDROXYL GROUPS AS ITS SOLE TERMINAL GROUPS REACTIVE WITH AN ISOCYANATE TO PRODUCT A PRODUCT HAVING A TERMINAL HYDROXYL GROUPS AND THEN REACTING THE THUS PRODUCED PRELIMINARY ADDITION PRODUCT WITH ADDITIONAL ORGANIC DISOCYANATE WHILE IN ADMIXTURE WITH A PRECURSOR OF AN AMINE ADAPTED TO SPLIT OFF AN AMINE WHEN HEATED TO A TEMPERATURE ABOVE 50* C., SAID PRECURSOR BEING SELECTED FROM THE GROUP CONSISTING OF ZINC SALTS OF SUBSTITUTED DITHIOCARBAMIC ACIDS, AND METAL SALTS OF ALKYL-SUBSTITUTED PYRIDINES, QUINALDINES, AND ACRIDINES, SAID METAL SALTS BEING SELECTED FROM THE GROUP CONSISTING OF COPPER, ZINC, LEAD, FERROUS, CALCIUM, COBALT, NICKEL AND FERROCYANIC ACID.