Polyurethanes in primary forms (excl. polyurethane of 2,2'"tertbutylimino"diethanol and 4,4'methylenedicyclohexyl diisocyanate, in the form of a solution in n,ndimethylacetamide)
Polyurethane of 2,2'"tertbutylimino"diethanol and 4,4'methylenedicyclohexyl diisocyanate, in the form of a solution in n,ndimethylacetamide, containing by weight > 50% of polymer