Flexible blocked aliphatic isocyanate polymers prepared in the presence of a metal-containing catalyst

Claim 1

A PROCESS FOR PRODUCING FLEXIBLE ISOCYANATE POLYMERS WHICH COMPRISES: HEATING TO A TEMPERATURE BETWEEN 80 AND 180*C. A MIXTURE COMPRISING (A) AN ALIPHATIC DI-ISOCYANATE, AND (B) A COMPOUND THAT IS MONOFUNCTIONAL WITH RESPECT TO ISOCYANATE RADICALS, SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC UNSUBSTITUTED MONOALCOHOLS HAVING 3 TO 18 CARBON ATOMS, PRIMARY ALIPHATIC UNSUBSTITUTED MONOAMINES HAVING 3 TO 18 CARBON ATOMS, SECONDARY ALIPHATIC UNSUBSTITUTED MONAMINES HAVING 3 TO 18 CARBON ATOMS, ALIPHATIC MONOCARBOXYLIC ACIDS HAVING 3 TO 18 CARBON ATOMS, HALOGENATED ALIPHATIC AND CYCLOALIPHATIC MONOALCOHOLS HAVING 2 TO 18 CARBON ATOMS PRIMARY AND SECONDARY MONOAMINES HAVING 2 TO 18 CARBON ATOMS, AND MONOCARBOOXYLIC ACIDS HAVING 2 TO 18 CARBON ATOMS, SAID COMPOUNDS (B) HAVING A MOLECULAR WEIGHT OF FROM 45 TO 440, THE MOLAR RATIO OF COMPOUNDS (A) TO (B) BEING BETTWEEN 1:1 TO 1:0.06, SAID MIXTURE ALSO CONTAINING FROM 0.05 TO 3% BY WEIGHT WITH REFERENCE TO THE WEIGHT OF SAID DI-ISOCYANATE OF (C) A CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL, ALKALINE EARTH METAL, ALUMINUM, TITANIUM, AND TIN (A) ALCOHOLATES, (B) CARBOXYLIC ACID SALTS, AND (C) MINERAL ACID SALTS.