Low viscosity polyuretidione polyurethanes and their use as cura

Details Low viscosity polyuretidione polyurethanes and their use as cura Low viscosity polyuretidione polyurethanes and their use as cura

1998-08-14

1999-01-19

Lusignan, Michael

Coating processes

With post-treatment of coating or coating material

Heating or drying

4273882, 528 45, 528 59, B05D 302, C08G 1806, C08G 1810, C08G 1880

Patent

active

058611932

ABSTRACT:
The present invention relates to the preparation and use of novel polyurethane polyuretidione crosslinking agents in solvent and water borne coatings systems. These polyuretidione polyurethanes are characterized by their relatively low solution viscosity, and the ability to provide a relatively high crosslink density in the final, cured film, and thereby, coatings with the excellent physical properties and resistance to chemical and environmental exposure of known polyurethane systems without the potential for worker exposure to toxic isocyanates. This invention also relates to a process for the production of these polyuretidiones and their use in pseudo-one and two component coating compositions.

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