Abstract: The invention relates to aqueous dispersions comprising nitrocellulose-polyurethane-polyurea particles, to a process for preparing them and to their use.

Abstract: The present invention provides coating agents made up of the reaction product of a) a polycarbonatediol component comprising a1) a polytetramethylene glycol-based polycarbonatediol with a molecular weight of between 400 and 8000, and a2) optionally other polyols with a molecular weight of from 200 to 8000, b) 0.5-2.0 mol per mol of a) of a chain extender selected from the group consisting of a low-molecular weight aliphatic or cycloaliphatic diol, a low-molecular weight aliphatic or cycloaliphatic diamine, and hydrazine, and c) 1.5-3.0 mol per mol of a) of an aliphatic, cycloaliphatic or aromatic diisocyanate, dissolved in d) 40-90 percent by weight (based on the total formulation) of an organic solvent selected from the group consisting of linear or cyclic esters, ketones, alcohols, aromatic compounds and mixtures thereof.

Abstract: The invention relates to new, hydrolysis-stable, aqueous polyurethane-polyurea dispersions based on polyether-polycarbonate-polyols, to a process for preparing them and to their use in coating materials.

Abstract: The present invention relates to new hydrophilicized blocked polyisocyanates, a process for preparing them and their use.

Abstract: The present invention relates to new blocked polyurethane (PU) prepolymers free from elimination products, to a process for preparing them and to their use as a starting component in the production of polyurethane plastics and surface coatings.

Abstract: The present invention relates to aqueous polyurethane-polyurea dispersions wherein the dispersions contain polyurethane-polyureas that are the reaction products of I) polyisocyanates having an isocyanate group functionality of ?2, II) a polymeric polyol component containing a) 50% to 100% by weight, based on the weight of polyol component II), of polyester polyols having a number average molecular weight Mn of 200 to 8000 g/mol and synthesized from a hydroxyl component and an acid component wherein 50% to 100% by weight, based on the total weight of the hydroxyl component used to prepare polyester polyols II.a), are diols corresponding to formula 1), wherein n is 1 and/or 2, and b) 0% to 50% by weight, based on the weight of polyol component II), of polymeric polyols other than polyester polyols a), and III) optionally other isocyanate-reactive compounds.

Abstract: Novel sizing compositions, their preparation and use. The compositions contain water-dispersible and/or water-soluble and alkylamine-blocked polyisocyanates, film-forming resins, coupling agents and lubricants. The isocyanates are synthesized from at least one polyisocyanate, at least one ionic and/or potentially ionic and/or nonionic compound, and at least one blocking agent which is at least 20% by weight aralkylamines.

Abstract: The invention provides hydrolysis-stable size compositions based on polycarbonate polyols and polytetramethylene glycol polyols, their preparation and use.

Abstract: This invention relates to solutions of polyurethaneureas in ?-butyrolactone or mixtures of ?-butyrolactone with toxicologically acceptable organic solvents. A process for coating substrates using these polyurethaneurea solutions, and substrates coated by said process are also provided. The substrates coated according to the invention are preferably textile products or leather, but materials such as wood or concrete can also be coated according to the invention.

Abstract: The present invention relates to a binder composition containing A) at least one aqueous polyurethane-polyurea dispersion and B) at least one stabilizer containing a) at least one amine having a structural unit corresponding to formula (I) ?which has no hydrazide groups, b) at least one compound having a structural unit corresponding to formula (II) —CO—NH—NH—??(II) ?and c) optionally a stabilizing compound other than a) and b). The polyurethane dispersions are manufactured in the presence of components a) and b). It is possible for components a) and b), depending on the grade used, to be incorporated into the polymer framework as structural units.

Abstract: The present invention relates to aqueous polyurethane-polyurea dispersions having two discrete maxima in the particle size distribution, wherein the maximum of the fine fraction is between 51 and 150 nm and the maximum of the coarse fraction is between 160 and 700 nm. The present invention also relates to a process for preparing the polyurethane-polyurea dispersions, to coating compositions containing these polyurethane-polyurea dispersions, and to coated substrates prepared from these coating compositions.

Abstract: The invention relates to aqueous coating material compositions stable to hydrolysis, to a process for preparing them and to their use as soft feel paint. The compositions comprise hydroxyl-free polyurethanes and/or polyurethane-ureas based on polycarbonate polyols and polytetramethylene glycol polyols, ionically modified, hydroxyl- and/or amino-containing polyurethanes and/or polyurethane-ureas and at least one crosslinker, and optionally further film-forming resins.

Abstract: Aqueous coating compositions based on polyurethane dispersions which cure under the influence of high-energy radiation, to a process for preparing them and to their use. The coating compositions contain a polyisocyanate, a polyurethane containing free-radically polymerizable groups, and an initiator which is capable of initiating a free-radical polymerization.

Abstract: Coating compositions that are stable to thermal yellowing that include coating materials containing I) one or more dispersions of hydroxyl-free polyurethanes and/or polyurethane-ureas, II) one or more aqueous solutions or dispersions of ionically modified, hydroxyl-containing polyurethanes and/or polyurethane-ureas, other than the constituents of component I), and III) at least one crosslinker.

Abstract: Aqueous polyurethane-polyurea dispersions, stabilized with respect to thermal yellowing, which have excellent mechanical properties and also to their preparation and use.

Abstract: Size compositions that include one or more polyurethane-polyurea dispersions; optionally further film-forming resins; and optionally crosslinkers. The dispersions are obtained by preparing an NCO-containing polyurethane prepolymer by reacting polyisocyanates with polymeric polyols and/or polyamines, optionally low molecular weight compounds, isocyanate-reactive, ionically or potentially ionically hydrophilicizing compounds and/or isocyanate-reactive nonionically hydrophilicizing compounds, and optionally in inert solvents with the proviso that none of components contains primary or secondary amino groups; followed by either dissolving the prepolymer in aliphatic ketones or, diluting the prepolymer solution by further addition of aliphatic ketones; and reacting the remaining free NCO groups of the prepolymer with a chain extender component. The dispersions are used in mouldings and/or coatings that can be used to caot substrates, such as glass fibers.

Abstract: A process for preparing glass fiber reinforced plastics using high-energy radiation. A sizing composition is applied to the glass fiber, and the curing mechanism of the sizing composition proceeds in a controlled way by the use of two crosslinking mechanisms which can be activated separately from one another. Aqueous UV-curing polyurethane dispersions containing few or no active hydrogen atoms are used in combination with water-dispersible or water-soluble blocked polyisocyanates.

Abstract: The invention relates to polyurethane-polyurea dispersions, also called PU dispersion, which contain aralkylamine-blocked isocyanate groups, and to their preparation and use. This blocking agent ahs a significantly lower deblocking temperature as compared with the prior art. Coatings produced from this dispersion have high hydrolysis resistances. The arylamine-blocked isocyanate groups are composed of polyisocyanates, polymeric polyols having average molar weights of 400 to 6000, at least one blocking agent, and either or both of nonionically hydrophilicizing compounds or compounds having at least one ionic or potentially ionic group.

Abstract: The present invention relates to aqueous one-component (1K) coating systems based on non-isocyanate-reactive polyurethane dispersions (polyurethane dispersions which are not reactive towards isocyanate groups) and blocked, hydrophobic polyisocyanates and also to a process for their preparation and use.

Abstract: The present invention relates to new hydrophilicized blocked polyisocyanates, a process for preparing them and their use.