Abstract: A process for the purification of organic isocyanates or isocyanate mixtures in which the amount of chlorine compound(s) present is reduced by mixing the isocyanate(s) or isocyanate mixtures with a gel-type or macroporous, anion-exchanging organic material having tertiary and/or quaternary amino groups. The process renders possible a purification of the isocyanates from chlorine-containing compounds which is milder than in conventional processes and is therefore particularly suitable for temperature-sensitive isocyanates.

Abstract: The present invention relates to polycyclic iminooxadiazinediones A corresponding to formula I ##STR1## The present invention also relates to mixtures of these polycyclic iminooxadiazinediones with other isocyanate derivatives and to their use for the production of optionally foamed polyurethane plastics, for the production of paints and coatings and for the production or formulation of active ingredients, pharmaceutical products, etc.

Abstract: The present invention relates to a heat-crosslinkable water-based coating composition containing as bindera) a water-soluble or water-dispersible polyol component andb) a water-soluble or water-dispersible blocked polyisocyanate which has an average NCO functionality of 2.0 to 2.6 and is based on the reaction product ofb1) a polyisocyanate mixture having an average NCO functionality of 2.5 to 3.5 and containing (i) at least 15% by weight of an organic diisocyanate,b2) a blocking agent for isocyanate groups in an amount of 50 to 80 equivalent-%, based on the isocyanate groups of component b1) andb3) an aliphatic monohydroxymonocarboxylic acid in a quantity of 20 to 50 equivalent-%, based on the isocyanate groups of component b1) and the hydroxyl groups of component b3), wherein the equivalent ratio, based on the isocyanate-reactive groups of blocking agent b2) and the hydroxyl groups of component b3) to the isocyanate groups of component b1) is at least 0.9:1.

Abstract: The present invention relates to a polyisocyanate mixture which has blocked isocyanate groups and an average NCO-functionality, based on reversibly blocked isocyanate groups, of 2.0 to 2.6, and is the reaction product, converted into the salt form by the at least partial neutralization of the incorporated carboxyl groups, ofi) at least one organic diisocyanate having a molecular weight of 168 to 300 withii) at least one monofunctional blocking agent for isocyanate groups,iii) at least one monobasic or dibasic hydroxycarboxylic acid,iv) 1 to 15 wt. %, based on the weight of component i), of at least one dihydric to hexahydric alcohol having a molecular weight of 62 to 182 andv) 50 to 500 wt. %, based on the weight of component i), of at least one diol having a molecular weight of 350 to 950 and containing ester groups.

Abstract: The present invention relates to a binder composition containinga) 20 to 70% by weight of oligomerization products of 1,6-diisocyanatohexane, the oligomerization products having isocyanate groups at least partially blocked with blocking agents for isocyanate groups and containing at least 50% by weight, based on the weight of the oligomerization products, of blocked uretdione diisocyanates corresponding to formula (I) ##STR1## wherein R represents the residue formed by removal of the active hydrogen atom from a monofunctional blocking agent, andb) 30 to 80% by weight of a polyol component containing a mixture ofb1) 100 parts by weight of an alkoxylation product of bisphenol A corresponding to formula (II) ##STR2## wherein R' is hydrogen or a methyl group and n is a whole or fractional number from 1 to 2,b2) 20 to 200 parts by weight castor oil andb3) 0 to 40 parts by weight of other organic polyhydroxyl compounds.