Water-dispersible polyisocyanate compositions

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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524507, 524590, 524839, 525123, 525455, 528 49, 528 67, 2521822, C08J 300, C08K 320, C08L 7500

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active

055632076

ABSTRACT:
Water-dispersible polyisocyanate compositions based on aliphatic and aromatic diisocyanates and having an NCO content, based on solids, of 6 to 21% by weight, a weight ratio of incorporated TDI units to incorporated HDI units of 6:1 to 0.1:1 and a content of ethylene oxide units, arranged within terminal polyether chains, of 5 to 40% by weight; a method for the preparation of these polyisocyanate compositions by reacting a polyisocyanate component with monovalent polyether alcohols containing ethylene oxide units at an NCO/OH equivalent ratio of 2:1 to 120:1; and aqueous coating compositions containing these polyisocyanate compositions and polyhydroxyl compounds as the binder.

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patent: 5200489 (1993-04-01), Jacobs et al.
patent: 5252696 (1993-10-01), Laas et al.
patent: 5331039 (1994-07-01), Blum et al.
patent: 5336711 (1994-08-01), Schneider et al.

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