Disclosed herein are processes for producing polyurethanes including mixing (a) polyisocyanate, (b) polymeric compounds having isocyanate-reactive groups, (c) optionally catalysts, (d) polymeric amines of general formula H.sub.2NW-NR-[W-NR].sub.l-[Q-NR].sub.m-[SNR].sub.n-W-NH.sub.2 and optionally (e) blowing agents, (f) chain extenders and/or crosslinking agents and (g) auxiliaries and/or additives to form a reaction mixture and reacting the reaction mixture to afford the polyurethane where the polydispersity of the polymeric amines (d) is at least 1.2. Further disclosed herein are a polyurethane produced by the process, a method of using such a polyurethane in enclosed spaces and a composition including (b) polymeric compounds having isocyanate-reactive groups, (c) catalysts and (d) polymeric amines of general formula H.sub.2NW-NR-[W-NR].sub.l-[Q-NR].sub.m-[SNR].sub.n-W-NH.sub.2 and blowing agents including water, where the polydispersity of the polymeric amines (d) is at least 1.2.

Disclosed herein are processes for producing polyurethanes including mixing (a) polyisocyanate, (b) polymeric compounds having isocyanate-reactive groups, (c) optionally catalysts, (d) polymeric amines of general formula H.sub.2NW-NR-[W-NR].sub.l-[Q-NR].sub.m-[SNR].sub.n-W-NH.sub.2 and optionally (e) blowing agents, (f) chain extenders and/or crosslinking agents and (g) auxiliaries and/or additives to form a reaction mixture and reacting the reaction mixture to afford the polyurethane where the polydispersity of the polymeric amines (d) is at least 1.2. Further disclosed herein are a polyurethane produced by the process, a method of using such a polyurethane in enclosed spaces and a composition including (b) polymeric compounds having isocyanate-reactive groups, (c) catalysts and (d) polymeric amines of general formula H.sub.2NW-NR-[W-NR].sub.l-[Q-NR].sub.m-[SNR].sub.n-W-NH.sub.2 and blowing agents including water, where the polydispersity of the polymeric amines (d) is at least 1.2.

The invention is related to a powder coating composition comprising a crosslinkable composition and a catalyst system, wherein the crosslinkable composition is formed by a crosslinkable donor component A and a crosslinkable acceptor component B that are crosslinkable by a Real Michael Addition (RMA) wherein at least part of the crosslinkable donor component A and/or a crosslinkable acceptor component B are (semi) crystalline and comprise a polyurethane backbone formed by reacting a polyisocyanate, which is substantially hexamethylene diisocyanate (HDI), with a compound (i) which is more preferably a diol; and a compound (iia) comprising at least one, preferably 1, isocyanate reactive groups, preferably a hydroxyl and at least one functional group having at least one acidic CH donor group in activated methylene or methine, a compound (iib) comprising at least one, preferably (1), isocyanate reactive groups, preferably a hydroxyl and at least one functional group having at least one activated unsaturated acceptor groups C?C, to form the (semi) crystalline acceptor component B.

The invention includes a reactive hot melt adhesive composition including an isocyanate functional prepolymer derived from a polyfunctional isocyanate having a functionality of about 2 or more and a polyol, an active hydrogen organofunctional silane, an active hydrogen non-silane capping agent and a thermoplastic polymer.

The invention includes a reactive hot melt adhesive composition including an isocyanate functional prepolymer derived from a polyfunctional isocyanate having a functionality of about 2 or more and a polyol, an active hydrogen organofunctional silane, an active hydrogen non-silane capping agent and a thermoplastic polymer.

A modification method of a polyurethane, including the steps of: preparing a polyurethane having an ethylenically unsaturated bond; and treating the polyurethane with a liquid containing a compound having a conjugated double bond, or a modification method of a polyurethane, including the steps of: preparing a polyurethane having a conjugated double bond; and treating the polyurethane with a liquid containing a compound having an ethylenically unsaturated bond is used.

The present invention relates to aqueous polyurethane-vinyl polymer hybrid dispersions which are prepared by polymerisation, initiated by free radicals, of ethylenically unsaturated monomers and polyurethane prepolymers containing acid groups and hydroxyl groups, to a method for their preparation, and to their use particularly as coating binder in multilayer coatings.

A process for the preparation of polycarbodiimides which also contain aziridine functions and which are not genotoxic. These aziridine-functional polycarbodiimides may be used as crosslinking agent.

A polyurethane-based UV absorber, obtained by reacting a UV absorber having a reactive hydrogen with a polyisocyanate and a diol or polyol; wherein the weight average molecular weight of the polyurethane-based UV absorber is in a range of 10,000 to 200,000.

The present invention relates to aqueous peptide-functionalized polyurethane dispersions that can be used as adhesives, in particular for metal surfaces, such as steel surfaces. As hybrid materials, they provide for a versatile system that can be finely tuned and combine the advantageous properties of polyurethane and peptide materials. Also encompassed are processes for their production, compositions containing them and their use as coatings and adhesives.