Soluble cured polyester polyurethanes
Abstract
Abstract A CURED POLYMERIC POLYURETHANE AND A METHOD FOR ITS PREPARATION WHICH COMPRISES REACTING, IN REQUIRED AMOUNTS, AN ORGANIC DIISOCYANATE SELECTED FROM TOLUENE DIISOCYANATE AND MIXTURES OF TOLUENE DIISOCYANATE WITH DIISOCYANATES SELECTED FROM 4,4''-DIPHENYL METHANE DIISOCYANATE AND 4,4''-DICYCLOHEXYL METHANE DIISOCYANATE WITH A MIXTURE COMPRISING A HYDROCARBON DIOL ADDITIVE HAVING FROM 2 TO 10 CARBON ATOMS AND HAVING TERMINAL HYDROXYL GROUPS, A DIAMINO DIPHENYL SULFONE AND A POLYMERIC POLYESTER HAVING A MOLECULAR WEIGHT OF FROM ABOUT 700 TO ABOUT 2500 DERIVED FROM CERTAIN HYDROCARBON DIOLS HAVING TERMINAL HYDROXYL GROUPS AND FROM DICARBOXYLIC ACIDS SELECTED FROM ADIPIC ACID AND AZELAIC ACED, WHEREIN THE ISOCYANATO GROUPS OF THE DIISOCYANATE ARE EQUAL TO FROM ABOUT 92 TO ABOUT 97 PERCENT OF THE TOTAL REACTIVE HYDROGENS SUPPLIED BY THE POLYMERIC POLYESTER, THE HYDROCARBON DIOL ADDITIVE AND THE DIAMINO DIPHENYL SULFONE, AND CURING THE REACTION MIXTURE.
Inventors
- 👤 John E Brownsword
Bibliographic Details
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