Mixture comprising a) at least one polyisocyanate, b) at least one reaction product of at least one polyisocyanate b1) with at least one compound b2) having at least one hydrophilic group which is not reactive toward isocyanate (group A) and precisely one group which is reactive toward isocyanate (group B) and c) dioxolane.

A polyisocyanate modified with sulphamic acid and a mixture thereof, the preparation method thereof, and the use thereof in the production of polyurethane, especially as a cross-linking ingredient in the field of aqueous coatings and adhesives containing groups that are capable of reacting with isocyanate groups.

The present invention relates to improved water-dispersible polyisocyanates with enhanced gloss, more particularly for two-component polyurethane coating materials.

The present invention relates to a hydrophilizing agent for producing a self-emulsifying polyisocyanate composition, the hydrophilizing agent comprising an anionic compound represented by the following formula (1): ##STR00001## wherein X represents a sulfo group or a hydroxysulfonyloxy group, R.sup.1 represents a straight-chain or branched alkylene group, and R.sup.2 represents a straight-chain or branched alkyl group; the total number of carbon atoms included in R.sup.1 and R.sup.2 is 6 or more and less than 14, and one or two or more carbon atoms in the groups R.sup.1 and R.sup.2 are optionally replaced with an oxygen atom(s).

Variations of this invention provide durable, impact-resistant structural coatings that have both dewetting and anti-icing properties. Dewetting and anti-icing performance is simultaneously achieved in a structural coating comprising (a) a continuous matrix; (b) discrete templates that promote surface roughness to inhibit wetting of water; (c) porous voids surrounding the discrete templates; and (d) nanoparticles that inhibit heterogeneous nucleation of water, wherein the discrete templates and/or the nanoparticles include a surface material with hydrophobicity that decreases with increasing temperature. The surface material may be a polymer brush exhibiting an upper critical solution temperature in water of 50 C. or higher. These structural coatings utilize low-cost, lightweight, and environmentally benign materials that can be rapidly sprayed over large areas using convenient coating processes. If the surface is damaged during use, freshly exposed surface will expose a coating identical to that which was removed, for extended lifetime.