摘要:
A polyurethane comprising lateral and/or terminal ethenylarylene groups produced by reacting a polyurethane prepolymer containing free isocyanate groups with an adduct obtained by reacting an ethenylarylene monoisocyanate with a polyol, polyamine, and/or a compound containing hydroxyl and amino groups in a molar ratio of 1:1. Also, a graft copolymer comprising a hydrophobic core comprising at least one monomer and a hydrophilic shell comprising the polyurethane, or a hydrophobic core comprising the polyurethane and a hydrophilic shell that comprises at least one monomer. Also, a graft copolymer comprising a hydrophobic core comprising at least one monomer and a hydrophilic shell comprising a polyurethane produced by dispersing at least one hydrophilic olefinic unsaturated polyurethane comprising lateral, and optionally terminal, ethenylarylene groups in an aqueous medium and copolymerizing at least one hydrophobic monomer in the polyurethane in emulsion.
摘要:
The invention relates to a method for producing chromophore and/or effect giving multilayer lacquers according to the wet-on-wet method. A water base lacquer is applied which contains at least one graft copolymer containing (A) at least one (meth)acrylate copolymer and (B) at least one polyurethane. The graft copolymer can be produced by (1) dispersing at least one hydrophilic or hydrophobic self cross-linking polyurethane (B) with a statistical average of at least one terminal and/or at least one lateral olefinically unsaturated group and at least one blocked isocyanate group per molecule in an aqueous medium. (2) A mixture of a at least one monomer (a1) with at least one isocyanate reactive functional group at last one monomer (a2) that can be copolymerised therewith is subsequently radically copolymerised in an emulsion in the presence of the polyurethane (B) or the polyurethanes (B). A powder slurry transparent lacquer layer is added to the resulting base lacquer layer. The base lacquer layer and the transparent lacquer layer are hardened together. The invention also relates to novel hydrophilic or hydrophobic self cross-linking polyurethanes (B) with at least one lateral and/or at least one terminal olefinically unsaturated group and at least one lateral blocked isocyanate group per molecule and graft copolymers on the basis of said polyurethanes (B) as well as the use thereof.
摘要:
The invention relates to a method for producing chromophore and/or effect giving multilayer lacquers according to the wet-on-wet method. A water base lacquer is applied which contains at least one graft copolymer containing (A) at least one (meth)acrylate copolymer and (B) at least one polyurethane. The graft copolymer can be produced by (1) dispersing at least one hydrophilic or hydrophobic self cross-linking polyurethane (B) with a statistical average of at least one terminal and/or at least one lateral olefinically unsaturated group and at least one blocked isocyanate group per molecule in an aqueous medium. (2) A mixture of a at least one monomer (a1) with at least one isocyanate reactive functional group at last one monomer (a2) that can be copolymerized therewith is subsequently radically copolymerized in an emulsion in the presence of the polyurethane (B) or the polyurethanes (B). A powder slurry transparent lacquer layer is added to the resulting base lacquer layer. The base lacquer layer and the transparent lacquer layer are hardened together. The invention also relates to novel hydrophilic or hydrophobic self cross-linking polyurethanes (B) with at least one lateral and/or at least one terminal olefinically unsaturated group and at least one lateral blocked isocyanate group per molecule and graft copolymers on the basis of said polyurethanes (B) as well as the use thereof.
摘要:
Self crosslinking polyurethane comprising lateral or terminal ethenylarylene groups, produced by reacting a polyurethane pre-polymer with an adduct, obtained by reacting an ethenylarylene mono-isocyanate with a compound containing hydroxyl groups or amino groups such that at least one group that is reactive to isocyanate remains in the adduct. Also, a self crosslinking graft copolymer containing at least one (meth)acrylate copolymer and at least one polyurethane produced by dispersing at least one self crosslinking olefinically unsaturated polyurethane comprising lateral or terminal ethenylarylene groups and blocked isocyanate groups in an aqueous medium and by radical copolymerization of a mixture of a monomer comprising at least one functional group that is reactive to isocyanate with a monomer that can be copolymerised with the mixture.
摘要:
The invention embraces basecoating compositions comprising as binder constituents (i) an acrylate dispersion having a content of from 30 to 60% by weight of C1-C8-alkyl (meth)acrylate-containing monomers, from 30 to 60% by weight of vinylaromatic monomers and from 0.5 to 10% by weight of (meth)acrylic acid in the polymer, and (ii) a dispersion of a polymer which is obtainable by subjecting an ethylenically unsaturated monomer or a mixture of ethylenically unsaturated monomers to free-radical polymerization in the presence of a water-insoluble initiator or of a mixture of water-insoluble initiators and in an aqueous dispersion of a polyurethane resin which has a number-average molecular weight Mn of from 1000 to 30,000 daltons and comprises on average from 0.05 to 1.1 polymerizable double bonds per molecule, the weight ratio between the polyurethane resin and the ethylenically unsaturated monomers or the mixture of ethylenically unsaturated monomers lying between 1:10 and 10:1, and (iii) a Theological assistant which comprises a synthetic polymer having ionic and/or associative groups. Also embraced are processes for producing multicoat coating systems with coats of the said basecoating compositions, and substrates coated with such multicoat coating systems.
摘要:
A process for improving the intercoat adhesion in a multicoat paint system utilizing a primer coat, an aqueous basecoat, and a clearcoat, where the multicoat paint system has been produced by means of a wet-on-wet technique. The clearcoat is produced using a pseudoplastic powder clearcoat slurry prepared by a secondary dispersion process or a melt emulsification process. The aqueous basecoat material used to produce the aqueous basecoat comprises a dispersed graft copolymer whose particles are composed of a hydrophobic core of copolymerized olefinically unsaturated monomers and of a hydrophilic shell which comprises a polyurethane, where said copolymer is prepared by free-radical (co)polymerization of the monomers in the presence of at least one polyurethane containing specially selected olefinically unsaturated groups.
摘要:
A solventborne coating material curable physically, thermally, or thermally and with actinic radiation, comprising A) at least one binder curable physically, thermally, or thermally and with actinic radiation, B) at least one color and/or effect pigment, and C) at least one colorless, transparent or opaque powder which is substantially inert with respect to the other constituents of the coating material and whose particles have an average size of from 1.0 to 10.0 μm and a density of from 1.25 to 3.6 g cm−3 and its use as basecoat material for producing multicoat color and/or effect paint systems.
摘要:
An aqueous coating material curable physically, thermally, or both thermally and with actinic radiation, comprising A) at least one ionically and/or nonionically stabilized polyurethane which is saturated, unsaturated and/or grafted with olefinically unsaturated compounds, as binder, B) at least one color and/or effect pigment, and C) at least one colorless, transparent or opaque powder which is substantially inert with respect to the other constituents of the coating material and whose particles have an average size of from 1.0 to 10.0 μm and a density of from 0.8 to 3.6 g cm−3; and its use for producing single-coat and multicoat color and/or effect paint systems on primed and unprimed substrates.
摘要翻译:包括A)至少一种离子和/或非离子稳定化的聚氨酯,其与饱和的,不饱和的和/或接枝的烯属不饱和化合物作为粘合剂,B)在 至少一种颜色和/或效果颜料,以及C)至少一种无色,透明或不透明的粉末,其相对于涂料的其它成分基本上是惰性的,并且其颗粒的平均尺寸为1.0-10.0μm, 密度为0.8至3.6g cm -3; 以及其在底漆和未底漆基材上生产单层和多色彩和/或效果涂料体系的用途。
摘要:
The present invention relates to a polyurethane-modified polyacrylate which is obtainableI. by polymerization with the additiona1) of an essentially carboxyl-free acrylate or of a mixture of acrylates,a2) of an ethylenically unsaturated monomer which carries at least one hydroxyl group per molecule and is essentially carboxyl-free or of a mixture of such monomers, anda3) of an essentially carboxyl-free, ethylenically unsaturated monomer which is different from (a1) and (a2), or of a mixture of such monomers,to give a polyurethane solution which contains no copoly-merizable double bonds,II. by subsequent further polymerization and additionb1) of at least one ethylenically unsaturated monomer which carries one carboxyl group per molecule, or of a mixture of such monomers, andb2) of an essentially carboxyl-free, ethylenically unsaturated monomer, or of a mixture of such monomers,after the monomers added in step I have been almost completely reacted, andIII. by neutralization after the end of the polymerization, and dispersion in water.
摘要:
A hydrophilic or hydrophobic polyurethane having at least one olefinically unsaturated group selected from the group consisting of pendant olefinically unsaturated groups, terminal olefinically unsaturated groups, and mixtures thereo wherein the pendant olefinically unsaturated groups are sele consisting of pendant olefinically unsaturated groups which are attached to a cycloaliphatic group which represents a link in the polymer main chain and pendant olefinically unsaturated groups which are present as a double bond in a cycloolefinic group which constitutes a link in the polymer main chain, and the terminal olefinically unsaturated groups are selected from the group consisting of terminal olefinically unsaturated groups which are attached to a cycloaliphatic group which forms an endgroup of the polymer main chain and terminal olefinically unsaturated groups which are present as a double bond in a cycloolefinic structure which forms en endgroup of the polymer main chain.