Abstract: The present invention relates to innovative single-component polyurethane systems based on water-soluble polyurethanes or their aqueous solutions, to a process for preparing them, and to the use.

Abstract: The invention relates to an aqueous coating composition based on a combination of aqueous binders and crosslinker, to a process for preparing it and to use for single-coat or multi-coat paint systems, especially coatings having anti-stonechip properties.

Abstract: The invention relates to novel aqueous, crosslinkable polyurethane dispersions based on terephthalic acid polyesters, the production thereof and their use in combination with hydroxy-functional reactants for the production of lacquers, coatings and sizes which are distinguished especially by high film hardness together with high elasticity and very good adhesion.

Abstract: Hydroxy-functional polyester-polyurethane dispersions comprising a reaction product of: (a) at least one, at least difunctional polyol component; (b) at least one ionizable compound having at least one acid group and at least one functional group capable of reacting with isocyanate groups, the at least one functional group selected from the group consisting of mono-, di-, and trihydroxycarboxylic acids, hydroxysulfonic acids, aminosulfonic acids, and aminocarboxylic acids; (c) at least one acid anhydride; and (d) at least one, at least difunctional polyisocyanate component; methods for preparing such dispersions; compositions containing such dispersions; and uses thereof.

Abstract: The present invention relates to the preparation of aqueous, solvent-free or low-solvent, storage-stable polyurethane crosslinker dispersions having pyrazole-blocked isocyanate groups, to coating compositions prepared from them and to their use in coatings.

Abstract: Blocked polyisocyanates and one-component stoving systems containing these blocked polyisocyanates, and the preparation thereof and their use for the preparation of lacquers, paints, adhesives and elastomers. The blocked polyisocyanates are derived from polyisocyanates reacted with secondary amines and cationic, anionic and/or nonionic hydrophilizing agents such that they are incorporated into the polyisocyanate at a ratio of from 20:1 to 1:1, wherein the blocking agents correspond to the formula R1–R4 can be identical or different and independently of one another denote hydrogen, C1–C6-alkyl or C3–C6-cycloalkyl, R5 denotes C1–C10-alkyl, C3–C10-cycloalkyl, and B represents ?wherein R6–R8 can be identical or different and independently of one another denote C1–C6-alkyl and/or C1–C6-cycloalkyl, R9 denotes hydrogen or C3–C6-alkyl or C3–C6-cycloalkyl.

Abstract: The present invention relates to aqueous self-crosslinking PU dispersions and to coatings prepared from them.

Abstract: The invention relates to aqueous and/or water-dilutable blocked polyisocyanates, their preparation and use in optionally self-crosslinking one-component systems.

Abstract: The present invention relates to light fast, aqueous, strippable coating compositions containing A) 40 to 90 wt. %, based on resin solids of A) and B), of aqueous polyurethane-polyureas and B) 10 to 60 wt. %, based on resin solids of A) and B), of polymers prepared from radically polymerizable monomers, wherein the percentages of A) and B) add up to 100, based on the weight of resin solids of A) and B). The present invention relates also to substrates coated with these strippable coating compositions. In addition, the present invention relates to the use of the stripped coatings as recycled material by mechanically comminuting the stripped coatings, optionally after cleaning, and then either pressing them in heatable presses to form sheets, or extruding them in an extruder to form endless thermoplastic threads, and then processing the resulting threads by known granulating methods to form cylindrical, spherical, lenticular or rhombic granules.

Abstract: The present invention relates to aqueous coating compositions containing A) at least one aqueous emulsion polymer, B) one or more polymer dispersions as a dispersion medium, C) at least one pigment, D) optionally a neutralizing agent and E) optionally a coatings additive. The present invention also relates to a process for preparing these aqueous coating compositions by preparing a dispersion paste by mixing components B), C) and D) with some of component E) and then component A) and the remainder of component E) are homogeneously blended with the dispersion paste. The present invention further relates to peelable coatings prepared from these coating compositions for the temporary protection of surfaces.

Abstract: The present invention relates to a storage-stable, waterborne, one-component, coating composition, which can be cured at temperatures below 100° C. to provide a stone chip resistant and sandable coating, containing as the binder a polyurethane dispersion A, which after physical drying results in a coating having a pendulum hardness according to DIN 53 157 of >90 s; a polyurethane dispersion B, which after physical drying results in a coating having a pendulum hardness (DIN 53 157) of <90 s; and a melamine resin C, which is preferably highly reactive. The present invention also relates to a process for coating substrates with these coating compositions and to the resulting substrates.

Abstract: The invention relates to aqueous and/or water-dilutable polyisocyanate crosslinkers blocked with diisopropylamine, to their preparation and use in one-component baking lacquers, for example as fillers in automotive lacquering.

Abstract: The present invention relates to aqueous polyurethane dispersions wherein the polyurethanes are reaction products of A) at least difunctional polyols having a molecular weight of 500 to 6000, B) at least difunctional low molecular weight alcohols, C) di- and/or trifunctional isocyanates and D) compounds with an acid group and one or two hydroxy- and/or primary or secondary amino groups in an amount sufficient to provide an acid number, based on resin solids, of <25 mg KOH/g of substance, wherein i) the neutralizing agent is added in an amount sufficient to neutralize 40 to 105% of the acid groups and an amount sufficient to neutralize at least 60% of the acid groups is added prior to the chain extension reaction, ii) at least 1 wt. % of components A) and B), based on the total weight of components A) to D), are tri- or higher-functional compounds and iii) the polyurethane contains 1 to 4 wt. % of the urea groups formed by the reaction of water and isocyanate groups.

Abstract: The present invention relates to coating compositions comprising a mixture of at least two aqueous, anionic polyurethane polyurea dispersions A and B, wherein dispersion A as a dry film has a TG in the range from −30° C., to −45° and dispersion B as a dry film has a first TG in the range from −30° C. to −45° C. and a second TG in the range from +45° C. to +60° C., and the mixture of A and B as a dry film has only one TG in the range from −30° C. to −45° C.

Abstract: The present invention relates to a substrate with at least one section having a surface decoration and a coating between the surface and the decoration. The coating can be peeled from the surface, and is prepared from an aqueous anionic polyurethane-polyurea dispersion which are free from co-solvents.

Abstract: The present invention relates to an aqueous dispersion containing A) a polyol component containing A1) 20 to 60 wt. %, based on the resin solids content of polyol component A), of a polyester resin containing 10 to 60 wt. %, based on the weight of the polyester resin, of one or more aliphatic, saturated or unsaturated monocarboxylic acids having 8 to 30 carbon atoms, and 0.4 to 5 wt. % of one or more radically polymerizable &agr;,&bgr;-unsaturated mono- or di-carboxylic acids having 3 to 8 carbon atoms, or their anhydrides, and A2) 40 to 80 wt. %, based on the resin solids content of polyol component A), of a polyacrylate, which is prepared in the presence of component A1), and B) 1 to 70 wt. %, based on the resin solids content of the aqueous dispersion, of one or more blocked polyisocyanates.

Abstract: The present invention relates to aqueous or water dilutable blocked polyisocyanates containing a) a polyisocyanate component and, based on the equivalents of isocyanate groups, b) 60 to 85 equivalent % of a pyrazole blocking agent, c) 15 to 40 equivalent % of a monohydroxycarboxylic acid to impart hydrophilic properties and d) 0 to 15 equivalent % of a difunctional chain extender containing OH and/or NH2 groups, wherein the amounts of a) to d) are selected so that the equivalent ratio of NCO groups of component a) to isocyanate-reactive groups of components b), c) and d) is 1:0.8 to 1:1.2. The present invention also relates to a process for preparing these polyisocyanate crosslinking agents and to their use in combination with polyhydroxyl compounds which are soluble and/or dispersible in water as binders for aqueous stoving lacquers.