Abstract: The invention relates to new, aqueous secondary copolymer dispersions, to a process for preparing them and to their use for producing high-grade coatings, especially for wood. The dispersions comprise a copolymer (P) synthesized from a mixture of free-radically polymerizable monomers (M) comprising (M1) cycloaliphatic esters of acrylic and/or methylacrylic acid and also (M2) vinyl esters of aliphatic carboxylic acids.

Abstract: The invention relates to aqueous polyurethane dispersions comprising diphenylmethane 2,2?-diisocyanate as a synthesis component, to a process for preparing them and to use as coating compositions.

Abstract: The invention relates to aqueous polyurethane dispersions comprising diphenyl-methane 2,2?-diisocyanate as a synthesis component, to a process for preparing them and to use as coating compositions.

Abstract: The invention relates to new, aqueous secondary copolymer dispersions, to a process for preparing them and to their use for producing high-grade coatings, especially for wood. The dispersions comprise a copolymer (P) synthesized from a mixture of free-radically polymerizable monomers (M) comprising (M1) cycloaliphatic esters of acrylic and/or methylacrylic acid and also (M2) vinyl esters of aliphatic carboxylic acids.

Abstract: The invention relates to aqueous polyurethane dispersions with a high hard-segment fraction and improved storage stability, to a process for preparing them, and to coating compositions prepared from them.

Abstract: The present invention relates to a process for preparing an aqueous coating composition by I) preparing a polyurethane dispersion that is free from NMP and other solvents by 1) preparing in a first step an NCO prepolymer solution which has a concentration of 66% to 98% by weight in a solvent having a boiling point of below 100° C. at atmospheric pressure and which is the reaction product of: a) one or more polyisocyanates with b) one or more polyols having average molecular weights Mn of 500 to 6000, c) one or more polyols having average molecular weights Mn of 62 to 500, and d) one or more compounds which contain an ionic group or a potential ionic group, 2) in a second step dispersing NCO prepolymer I.1) in water and at least partly neutralizing the potential ionic groups to form ionic groups before, during or after the dispersion, 3) in a third step chain extending NCO prepolymer I.

Abstract: The invention relates to aqueous polyurethane dispersions based on fatty acid dialkanolamides, to a process for preparing them and to use as coating compositions.

Abstract: The invention relates to aqueous polyurethane dispersions based on fatty acid dialkanolamides, to a process for preparing them and to use as coating compositions.

Abstract: This invention relates to binders for aqueous coatings, to a process for the production thereof and to the use thereof for lacquers and coatings.

Abstract: The present invention relates to a binder composition containing A) 70 to 99% of a polyurethane dispersion having an OH number of <10 mg KOH/g of solid resin and B) 1 to 30% of a water-dispersible polyisocyanate mixture prepared from an aliphatic, cycloaliphatic, araliphatic and/or aromatic diisocyanate, wherein the polyisocyanate mixture has a) an average isocyanate functionality of at least 2.0, b) a content of isocyanate groups (calculated as NCO; molecular weight 42) of 5.0 to 25.0 wt. %, and c) a content of ethylene oxide units of 2 to 50 wt. % (calculated as C2H4O; molecular weight 44) present within polyether chains containing an average of 5 to 35 ethylene oxide units, wherein at least 60 mole % of the polyether chains are connected via allophanate groups to two polyisocyanate molecules which are each prepared from at least two diisocyanate molecules and wherein the solids contents of components A) and B) add up to 100%.

Abstract: The present invention relates to water-borne coating compositions wherein the binder contains a mixture of a) a polyol component dispersed in water or a water/solvent mixture which contains at least one polymer prepared from olefinically unsaturated monomers and having a molecular weight (Mn) of at least 500, at least two alcoholic hydroxyl groups per molecule, a hydroxyl value of 15 to 250 mg KOH/g, an acid value of 0 to 7 mg KOH/g and a total content of sulfonate and carboxylate groups of 0 to 4.5 milliquivalents per 100 g of solid resin and b) a polyisocyanate component which is emulsified in the dispersion of polyol component a), has a viscosity at 23° C. of 50 to 10,000 mPa.s and an average NCO functionality of 1.8 to 4.2, and contains 12.0 to 21.

Abstract: The present invention relates to polyurethane-polyacrylate hybrid dispersions comprising A) 20 to 99% by weight, based on resin solids, of a polyurethane wherein i) the polyurethane is rendered hydrophilic by ionic and/or nonionic hydrophilic groups and ii) the polyisocyanate component used to prepare the polyurethane contains an aliphatic or cycloaliphatic polyisocyanate containing allophanate groups, and B) 1 to 80% by weight, based on resin solids) of a polyacrylate polymer, wherein the sum of components A and B is 100%, based on the total weight of A) and B). The present invention also relates to the use of these hybrid dispersions for coating substrates, in particular wood.

Abstract: The present invention relates to storage stable, aqueous polyurethane-polyacrylate hybrid dispersions, which are self crosslinkable at room temperature and contain A) 10 to 95 wt. %, of a polyurethane dispersion,B) 5 to 90 wt. %, of a polymer prepared in the presence of component A) from a mixture of vinyl monomers containing 0.5 to 20 wt. %, based on the total resin solids content of the hybrid dispersion, of a vinyl monomer containing acetoacetoxy groups andC) an at least difunctional primary or secondary amine, which is present in an equivalent ratio of amino groups to acetoacetoxy groups of 0.5:1 to 1.1:1,in which the wt. % of components A) and B) add up to 100, based on the total weight of components A) and B).The present invention also relates to one-component coating compositions containing these hybrid dispersions as binders and to substrates coated with these coating compositions.

Abstract: The present invention relates to a process for the preparation of a coating bya) applying to a water-resistant substrate an aqueous coating composition containing water and a binder which consists essentially of at least one hydrophilically-modified organic polyisocyanate or polyisocyanate mixture which has an NCO content of 5 to 30, preferably 10 to 23% by weight, and is dispersible in water andb) curing the composition in the presence of moisture to form a polyurea coating.

Abstract: The present invention relates to aqueous polyurethane-urea dispersions which are film forming at temperatures of .ltoreq.20.degree. C. in the absence of film forming additives, dry at room temperature to yield films having a hardness according to DIN 53 157 (Konig pendulum hardness) of .gtoreq.100 seconds, in which the polyurethane-ureas have a urethane group content (calculated as --NH--CO--O--, molecular weight 59) of 7 to 20 wt. %, and a urea group content (calculated as -NH-CO-N, molecular weight 57) of 5 to 18 wt. %, and contain 15-70 wt. %, based on resin solids, of structural units prepared by incorporating 1-methyl-2,4- and/or -2,6-diisocyanatocyclohexane in the form of urethane and/or urea groups. The present invention also relates to a process for the production of these aqueous polyurethane-urea dispersions and to their use in coating compositions.

Abstract: The invention relates to an aqueous binder composition having a long processing time (time within which the mixture can be processed without loss of quality) based on aqueous dispersions or solutions of binder mixtures, which contain at least one hydroxyl-group containing polyester dispersion or solution, at least one physically drying, aqueous polyurethane dispersion that is substantially free from hydroxyl or amino groups, and a polyisocyanate. The present invention also relates to the use of these binders in lacquers and coating compositions, in particular for coating rigid, non-flexible substrates.