Aqueous two component polyurethane coatings, preparation thereof

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...

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2521822, 4273722, 4273855, 524839, 524840, C08J 300, C08K 320, C08L 7500, C09K 300

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06048926&

ABSTRACT:
A composition containing an unblocked monomeric diisocyanate finely dispersed an aqueous dispersion of at least one organic polyhydroxy compound. The composition may be used to prepare aqueously disperse two component polyurethane coatings where the diisocyanate functions as a curing agent and the polyhydroxy compound serves as a binder agent. In the composition, the ratio of hydroxyl groups in the polyhydroxy compound to the isocyanate groups in the diisocyanate is 0 5:1 to 5:1. The composition may be used to apply polyurethane coatings to substrates.

REFERENCES:
patent: 5075370 (1991-12-01), Kubitza et al.
patent: 5705557 (1998-01-01), Lange et al.

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