Abstract: The present invention relates to a pigmented aqueous basecoat material comprising a polyether-based reaction product which is preparable by reaction of (a) at least one diisocyanate of the formula (I) OCN—Y—NCO??(I) in which Y is a divalent aliphatic, aromatic or araliphatic hydrocarbon radical having from 6 to 30 carbon atoms, with (b) at least one polyether of the general structural formula (II) in which R is a C3 to C6 alkylene radical and n is selected accordingly such that the polyether (b) possesses a number-average molecular weight of 200 to 4000 g/mol, where components (a) and (b) are used in the reaction in a molar ratio of 0.7/2.3 to 1.6/1.7 and the resulting reaction product possesses a number-average molecular weight of 500 to 15 000 g/mol and an isocyanate content of less than 0.2%.

Abstract: The present invention relates to a pigmented aqueous basecoat material comprising a carboxy-functional dimer fatty acid-based reaction product which is preparable by reaction of (a) dimer fatty acids with (b) at least one compound of the general structural formula (I) where R is a C3 to C6 alkylene radical and n is selected accordingly such that the polyether (b) possesses a number-average molecular weight of 120 to 6000 g/mol, components (a) and (b) are used in a molar ratio of at least 1/1 and the resulting reaction product possesses a number-average molecular weight of 1000 to 20 000 g/mol and an acid number of 10 to 120 mg KOH/g.

Abstract: The present invention relates to a pigmented aqueous basecoat material comprising a reaction product which is preparable by reaction of (a) at least one compound of the formula (I) X1—Y—X2??(I) in which X1, X2 independently of one another, are each a functional group which is reactive toward epoxide groups, or hydrogen, with, however, at least one of the two groups X1 and X2 being a functional group which is reactive toward epoxide groups, and Y is a divalent aliphatic, aromatic or araliphatic hydrocarbon radical having a number-average molecular weight of 100 to 2500 g/mol, with (b) at least one compound of the general structural formula (II) in which R is a C3 to C6 alkylene radical and n is selected accordingly such that the compound (b) possesses an epoxide equivalent weight of 100 to 2000 g/mol, where components (a) and (b) are used in the reaction in a molar ratio of 2.3/0.7 to 1.7/1.

Abstract: The present invention relates to a pigmented aqueous basecoat material comprising a reaction product which is preparable by reaction of (a) at least one aliphatic linear polyester having two functional end groups (a.1), with (b) at least one diene polymer having two functional end groups (b.1), where at least one type of group (a.1) is reacted in a linking manner with at least one type of group (b.1), said components (a) and (b) are used in the reaction in a molar ratio of 2.3/0.7 to 1.7/1.6 and the resulting reaction product possesses a number-average molecular weight of 1000 to 15 000 g/mol.

Abstract: The present invention relates to a pigmented aqueous basecoat material comprising a polyether-based reaction product which is preparable by reaction of (a) at least one compound of the formula (I) X1-Y-X2??(I) in which X1 and X2, independently of one another, are each a functional group which is reactive toward hydroxyl groups, and Y is a divalent aliphatic or araliphatic, carboxy-functional organic radical having a number-average molecular weight of 100 to 1000 g/mol, with (b) at least one polyether of the general structural formula (II) in which R is a C3 to C6 alkylene radical and n is selected accordingly such that the polyether (b) possesses a number-average molecular weight of 200 to 4000 g/mol, where components (a) and (b) are used in the reaction in a molar ratio of 0.7/2.3 to 1.6/1.7 and the resulting reaction product possesses a number-average molecular weight of 500 to 15 000 g/mol and an acid number of 10 to 120 mg KOH/g.

Abstract: Described is a method for producing a multicoat color and/or effect paint system by (1) applying to a substrate a pigmented aqueous basecoat material, (2) forming a polymer film from the coating material applied in stage (1), (3) applying a clearcoat material to the resultant polymer film, and then (4) curing the polymer film together with the clearcoat film. The pigmented aqueous basecoat material comprises at least one alcohol having a structure: wherein R is a C1 to C4 alkyl radical, with the proviso that R is not an n-butyl radical. The at least one alcohol is used in an amount of 0.1% to 5% by weight, based on the total weight of the aqueous basecoat material. Additionally, described are the corresponding coating materials and also the use of the alcohols in pigmented aqueous coating materials.

Abstract: The present invention relates to a method for producing a multicoat paint system on a metallic substrate, in which a basecoat or a plurality of directly successive basecoats are produced directly on a metallic substrate coated with a cured electrocoat, a clearcoat is produced directly on the one basecoat or the uppermost of the plurality of basecoats, and then the one or more basecoats and the clearcoat are jointly cured, and wherein at least one basecoat material used for production of the basecoats comprises the following components: an aqueous dispersion comprising at least one specific copolymer, a specific linear hydroxy-functional reaction product and a polyurethane resin, the preparation of which involves using at least one compound containing at least one carboxylic acid group and at least one group reactive toward isocyanate groups.

Abstract: The present invention relates to a pigment paste comprising at least one aqueous dispersion comprising at least one copolymer, said copolymer being preparable by (i) initially charging an aqueous dispersion of at least one polyurethane, and then (ii) polymerizing a mixture of olefinically unsaturated monomers in the presence of the polyurethane from (i), in which (a) a water-soluble initiator is used, (b) the olefinically unsaturated monomers are metered in such that a concentration of 6.0% by weight, based on the total amount of olefinically unsaturated monomers used for polymerization, in the reaction solution is not exceeded over the entire reaction time, and (c) the mixture of the olefinically unsaturated monomers comprises at least one polyolefinically unsaturated monomer, and further comprising a pigment, where the weight ratio of pigment to copolymer is at least 1.5. The invention further relates to the use of the copolymer for dispersion of pigments.

Abstract: The present invention relates to a method for producing a multicoat paint system on a metallic substrate, in which a basecoat or a plurality of directly successive basecoats are produced directly on a metallic substrate coated with a cured electrocoat, a clearcoat is produced directly on the one basecoat or the uppermost of the plurality of basecoats, and then the one or more basecoats and the clearcoat are jointly cured, and wherein at least one basecoat material used for production of the basecoats comprises at least one linear hydroxy-functional reaction product (R) having an acid number of less than 20 mg KOH/g, the preparation of which involves using at least one compound (v) containing two functional groups (v.1) and an aliphatic or araliphatic hydrocarbyl radical (v.2) which is arranged between the functional groups and has 12 to 70 carbons atoms.

Abstract: The present invention relates to an aqueous coating composition comprising at least one aqueous dispersion comprising at least one copolymer (CP), said copolymer (CP) being preparable by (i) initially charging an aqueous dispersion of at least one polyurethane, and then (ii) polymerizing a mixture of olefinically unsaturated monomers in the presence of the polyurethane from (i), in which (a) a water-soluble initiator is used, (b) the olefinically unsaturated monomers are metered in such that a concentration of 6.0% by weight, based on the total amount of olefinically unsaturated monomers used for polymerization, in the reaction solution is not exceeded over the entire reaction time, and (c) the mixture of the olefinically unsaturated monomers comprises at least one polyolefinically unsaturated monomer, at least one linear hydroxy-functional reaction product (R) having an acid number less than 20 mg KOH/g, the preparation of which involves using at least one compound (v) containing two functional groups (v.

Abstract: The present invention relates to an aqueous coating composition comprising at least one aqueous dispersion comprising at least one copolymer (CP), said copolymer (CP) being preparable by (i) initially charging an aqueous dispersion of at least one polyurethane, and then (ii) polymerizing a mixture of olefinically unsaturated monomers in the presence of the polyurethane from (i), in which (a) a water-soluble initiator is used, (b) the olefinically unsaturated monomers are metered in such that a concentration of 6.0% by weight, based on the total amount of olefinically unsaturated monomers used for polymerization, in the reaction solution is not exceeded over the entire reaction time, and (c) the mixture of the olefinically unsaturated monomers comprises at least one polyolefinically unsaturated monomer and at least one linear hydroxy-functional reaction product (R) having an acid number less than 20 mg KOH/g, the preparation of which involves using at least one compound (v) containing two functional groups (v.

Abstract: The present invention relates to a method for producing a multicoat paint system on a metallic substrate, in which a basecoat or a plurality of directly successive basecoats are produced directly on a metallic substrate coated with a cured electrocoat, a clearcoat is produced directly on the one basecoat or the uppermost of the plurality of basecoats, and then the one or more basecoats and the clearcoat are jointly cured, and wherein at least one basecoat material used for production of the basecoats comprises at least one aqueous dispersion comprising at least one copolymer, said copolymer being preparable by (i) initially charging an aqueous dispersion of at least one polyurethane, and then (ii) polymerizing a mixture of olefinically unsaturated monomers in the presence of the polyurethane from (i), in which (a) a water-soluble initiator is used, (b) the olefinically unsaturated monomers are metered in such that a concentration of 6.

Abstract: Disclosed is a polymer which is prepared by reacting (a) dimer fatty acids with (b) at least one polyether of general structural formula (I) where R is a C3 to C6 alkylene radical and n is selected accordingly such that said polyether has a number-average molecular weight of 450 to 2200 g/mol, components (a) and (b) are used in a molar ratio of 0.7/2.3 to 1.3/1.7, and the resulting polymer has a number-average molecular weight of 1500 to 5000 g/mol and an acid number <10 mg KOH/g. Also disclosed is a pigmented aqueous basecoat material which comprises this polymer, and the use of said polymer in pigmented aqueous basecoat materials. It further relates to a method for producing multicoat paint systems, and also to the multicoat paint systems producible by means of said method. Moreover, the present invention relates to the refinish of defect areas on multicoat paint systems.

Abstract: The present invention relates to a method for producing a multicoat paint system on a metallic substrate, in which a basecoat or a plurality of directly successive basecoats are produced directly on a metallic substrate coated with a cured electrocoat, a clearcoat is produced directly on the one basecoat or the uppermost of the plurality of basecoats, and then the one or more basecoats and the clearcoat are jointly cured, and wherein at least one basecoat material used for production of the basecoats comprises at least one aqueous dispersion comprising at least one copolymer (CP), said copolymer (CP) being preparable by initially charging an aqueous dispersion of at least one polyurethane, and then polymerizing a mixture of olefinically unsaturated monomers in the presence of the polyurethane from (i), in which a water-soluble initiator is used, the olefinically unsaturated monomers are metered in such that a concentration of 6.

Abstract: The present invention relates to a dimer fatty acid/polyesterdiol reaction product which is preparable by reacting (a) dimer fatty acids with (b) at least one polyesterdiol of the general structural formula (I) where R is a divalent radical comprising 2 to 10 carbon atoms, R1 and R2 independently of one another are straight-chain or branched alkylene radicals having 2 to 10 carbon atoms, X and Y independently of one another are O, S or NR3, in which R3 is hydrogen or an alkyl radical having 1 to 6 carbon atoms, and m and n are selected accordingly such that the polyesterdiol possesses a number-average molecular weight of 450 to 2200 g/mol, where components (a) and (b) are used in a molar ratio of 0.7/2.3 to 1.3/1.7 and the resulting dimer fatty acid/polyesterdiol reaction product possesses a number-average molecular weight of 1500 to 5000 g/mol and an acid number <10 mg KOH/g.

Abstract: Disclosed is a method for making multicoat color and/or effect paint systems employing a pigmented aqueous basecoat material comprising a mixture M comprised of (K1) a branched C8-17 alkane or a mixture thereof, (K2) a branched C18-25 alkane or a mixture thereof, and (K3) a water-miscible fluorinated polymer or a mixture thereof, where mixture M comprises 0.1% to 5% by weight, based on the weight of the aqueous basecoat material, component (K1) comprises 34% to 94% by weight, component (K2) comprises 5% to 46% by weight, and component (K3) comprises 1% to 20% by weight, all based on the weight of the mixture M, and components (K1) and (K2) have a degree of branching which corresponds to a ratio of the number of >CH— and —CH2— groups to the number of —CH3 groups of at least 25:75.

Abstract: The present invention relates to a reaction product preparable by reacting (a) dimer fatty acids with (b) at least one polyether of the general structural formula (I) where R is a C3 to C6 alkylene radical and n correspondingly is selected such that said polyether possesses a number-average molecular weight of 2250 to 6000 g/mol, components (a) and (b) are used in a molar ratio of 0.7/2.3 to 1.6/1.7, and the resulting reaction product possesses a number-average molecular weight of 4800 to 40000 g/mol and an acid number of less than 10 mg KOH/g. The invention further relates to a pigmented aqueous basecoat material which comprises this reaction product, and to the use of the reaction product in pigmented aqueous basecoat materials for improving adhesion. The present invention further relates to a method for producing multicoat paint systems, and also to the multicoat paint systems producible by means of said method.

Abstract: The present invention relates to a dimer fatty acid/dimer diol reaction product which is preparable by reacting (a) dimer fatty acids with (b) at least one dimer diol, where components (a) and (b) are used in a molar ratio of 0.7/2.3 to 1.3/1.7 and the resulting dimer fatty acid/dimer diol reaction product possesses a number-average molecular weight of 1200 to 5000 g/mol and an acid number <10 mg KOH/g. The invention further relates to a pigmented aqueous basecoat material which comprises this dimer fatty acid/dimer diol reaction product, and also to the use of said dimer fatty acid/dimer diol reaction product in pigmented aqueous basecoat materials. It relates, further, to a method for producing multicoat paint systems, and also to the multicoat paint systems producible by means of said method. The present invention relates, furthermore, to the refinishing of defects on multicoat paint systems.

Abstract: The present invention relates to a reaction product preparable by reacting (a) dimer fatty acids with (b) at least one compound (b) of the general structural formula (I) where R is a C3 to C6 alkylene radical and n correspondingly is selected such that the compound (b) possesses a number-average molecular weight of 120 to 445 g/mol, components (a) and (b) are used in a molar ratio of 0.7/2.3 to 1.6/1.7, and the resulting reaction product possesses a number-average molecular weight of 600 to 4000 g/mol and an acid number of less than 10 mg KOH/g. The invention further relates to a pigmented aqueous basecoat material which comprises this reaction product, and to the use of the reaction product in pigmented aqueous basecoat materials for improving adhesion. The present invention further relates to a method for producing multicoat paint systems, and also to the multicoat paint systems producible by means of said method.

Abstract: Disclosed is a method for producing a multicoat color and/or effect paint system, comprising (1) applying a pigmented aqueous basecoat to a substrate, (2) forming a polymer film from the basecoat applied in stage (1), (3) applying a clearcoat to the polymer film, and then (4) curing the polymer film together with the applied clearcoat to form a clearcoat film. The pigmented aqueous basecoat comprises at least one ester characterized by the following structure: where R1 is selected from the group of ethyl and isopropyl and R2 is a C2 to C8 radical. The at least one ester is used here in an amount of 0.1% to 5% by weight, based on the total weight of the aqueous basecoat applied in stage (1). The invention further provides the corresponding coating materials and the use of the esters in pigmented aqueous coating materials.