Metallo-organic catalyzed one-shot process for preparing urethaneurea elastomers

Claim 1

A PROCESS FOR PREPARING URETHANE-UREA ELASTOMERS WHICH COMPRISES SIMULTANEOUSLY INTERACTING THREE REACTANTS (1), (2) AND (3) IN THE PRESENCE OF A CATALYST (4), SAID REACTANT (1) BEING SELECTED FROM THE GROUP CONSISTING OF A POLYOXYALKYLENE POLYOL AND MIXTURES THEREOF HAVING AN EQUIVALENT WEIGHT FROM ABOUT 200 TO 2,000, AND OXYGEN/CARBON ATOM RATIO FROM ABOUT 1/2 TO 1/4 AND ABOUT 2 TO 6 TERMINAL HYDROXYL GROUPS; SAID REACTANT (2) BEING A CHEMICALLY HINDERED, AROMATIC DIAMINE, AND SAID REACTANT (3) BEING AN ORGANIC DIISOCYANATE IN THE PRESENCE OF SAID CATALYST (4) A METALLO-ORGANIC SALT CATALYST AT A TEMPERATURE FROM ABOUT 0* TO 120*C. AND CURING THE REACTION MIXTURE AT A TEMPERATURE FROM ABOUT 20* TO 150*C., SAID DIAMINE BEING EMPLOYED IN AN AMOUNT TO PROVIDE AN NH2/OH RATIO FROM ABOUT 0.5:1.8/1, SAID DIISOCYANATE BEING EMPLOYED IN AN AMOUNT TO PROVIDE AN NCO/(OH+NH2) RATIO FROM ABOUT 0.95:1.6/1, SAID CATALYST BEING EMPLOYED IN AN AMOUNT CORRESPONDING TO 0.01 TO 1.0 PERCENT OF THE COMBINED WEIGHT OF POLYNOL AND DIAMINE, AND, PROVIDIING FURTHER, THAT SAID REACTANTS ARE SUBSTANTIALLY ANHYDROUS AND SUBSTANTIALLY FREE OF ENTRAPPED GASES.