Abstract: The present invention relates to new water-dilutable or water-soluble blocked polyisocyanates which allow the preparation of bakeable one-component (1K) polyurethane coating materials which exhibit rapid initial physical drying, exhibit reduced thermal yellowing and lead to haze-free coatings, to a process for preparing them, and to their use.

Abstract: An aqueous coating composition containing A) one or more water-dilutable polyester polyols having an OH number of from 20 to 300 mg KOH/g and an acid number of from 20 to 80 mg KOH/g, obtained by reacting a) 49 to 40 mol % of a carboxylic acid component containing a1) one or more aliphatic, cycloaliphatic, araliphatic and/or aromatic carboxylic acids with a COOH functionality ?2 and a2) optionally, aromatic, cycloaliphatic and/or aliphatic monocarboxylic acids with b) 51 to 60 mol % of an alcohol component containing b1) one or more aliphatic, cycloaliphatic and/or araliphatic polyols with Mn of from 62 to 272 g/mol and an average OH functionality ?2 and b2) optionally, aliphatic, cycloaliphatic and/or araliphatic monoalcohols, B) one or more OH-reactive crosslinkers C) water, D) neutralizing agents and E) optionally solvents, auxiliaries and additives. The aqueous coating compositions can be used for coating metal substrates, such as cans.

Abstract: The present invention relates to inner coatings of metal food containers and packaging and to a process for their production. The coatings are applied to the inside of at least a portion of the surface area of containers that are in direct contact with foods or other consumable products and subsequently cured. The coatings include a) at least one polyisocyanate containing an average of at least two NCO groups per molecule, at least 95% of the NCO groups being blocked with a blocking agent, and b) at least one polyhydroxyl compound containing an average of at least two hydroxyl groups per molecule that react with NCO groups.

Abstract: The present invention provides a process for preparing aqueous solutions of NCO group blocked resins having polyimide structures and optionally, polyamide structures. The process comprises the steps of preparing a polymer from at least one polyisocyanate, at least one tricarboxylic monoanhydride and/or at least one tetracarboxylic anhydride, and optionally, tricarboxylic acids, tetracarboxylic acids and/or dicarboxylic acids, at least one NH-functional lactam and/or 3,5-dimethylpyrazole and/or butanone oxime. The reaction mixture is subsequently reacted with a base, and the resulting resin is dissolved in water. The resins provide high-grade, highly flexible coatings having the excellent properties and chemical resistance typical of polyamideimides.

Abstract: The present invention relates to new water-dilutable or water-soluble blocked polyisocyanates which allow the preparation of bakeable one-component (1K) polyurethane coating materials which exhibit rapid initial physical drying, exhibit reduced thermal yellowing and lead to haze-free coatings, to a process for preparing them, and to their use.

Abstract: The present invention relates to aqueous- or solvent-based, one-component, polyurethane stoving coating compositions containing i) polyisocyanates blocked with CH-acidic esters, especially malonic esters, ii) OH-containing polymeric compounds, and iii) 0.5 to 4.0 wt. %, based on the solids content of components i) and ii), of tetravalent titanium compounds. The stoving coating compositions have a low stoving temperature and are useful for coating plastic parts.

Abstract: The present invention relates to a coating system containing I) anhydrous, gel-like, high molecular weight polyurethane compositions, which may contain active substances, based on (1) 15 to 62 wt. %, based on the weight of 1) and 2), of a high molecular weight covalently crosslinked polyurethane matrix and (2) 38 to 85 wt. %, based on the weight of 1) and 2), of a liquid dispersing agent firmly bound in the matrix by secondary valence bonds, wherein the liquid dispersing agent contains one or more polyhydroxyl compounds having a number average molecular weight of 1000 to 12000 and an OH number of 20 to 112, wherein the dispersing agent is substantially free from hydroxyl compounds having a molecular weight below 800, and II) solvent-containing, solvent-free and/or aqueous polyurethane topcoats.

Abstract: The present invention relates to blocked polyisocyanate cross-linking agents and their use in one-component stoving lacquers, in particular in solvent-containing or predominantly water-based plastics coatings having a soft-feel effect.

Abstract: The invention relates to an elastic coating system with which dry surfaces can be formed by UV curing of constituents containing (meth)acryloyl groups and by subsequent crosslinking of constituents containing NCO groups with constituents containing active hydrogen. The invention also relates to their use of this coating, system for coating, inter alia, components of plastic.