摘要:
The present invention relates to a process for the preparation of polyurethane resins, in which, in an ester as solvent, a) at least one compound having 2 hydroxyl and/or amino groups, b) at least one di- and/or polyisocyanate, c) at least one compound containing 2 groups which are reactive toward isocyanate groups, these compounds containing, at least in part, at least one group capable of forming anions which is neutralized before or after incorporation of component (c) into the polyurethane molecule, and d) at least one compound having at least 3 hydroxyl and/or amino groups are used to prepare a polyurethane resin, preferably using components (a), (b) and (c) to prepare an intermediate which has terminal isocyanate groups and at least some of whose free isocyanate groups are subsequently reacted with component (d), characterized in that ethoxyethyl propionate is employed as solvent.
摘要:
The present invention relates to a mixer system for the production of water-thinnable coating compositions having a precisely defined color shade, from various base colors, which mixer system is characterized in that it comprises A) various base colors A which contain less than 5% by weight of water, at least one color and/or effect pigment, organic solvent, at least one water-dilutable or water-dispersible acrylic polyurethane resin (A1) and/or polyacrylate resin (A2) and optionally auxiliaries and additives, and B) at least one pigment-free component B which contains water. The present invention also relates to a process for the production of coating compositions using this mixer system and to the use of the mixer system for the production of aqueous basecoats for the coating of automobile bodies and/or plastic parts, in particular for automotive refinishing.
摘要:
The invention relates to coating compositions for the production of coatings which are resistant to condensed water and comprise binders based on a polyurethane resin PUR which comprises alpha, omega-polymethacrylatediols (A) as structural units. The alpha, omega-polymethacrylatediols (A) preferably consist of the monomer units methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, n-pentyl methacrylate, amyl methacrylate, n-hexyl methacrylate, n-octyl methacrylate, 2-ethylhexyl methacrylate, n-decyl methacrylate, cyclopentyl methacrylate, cyclohexyl methacrylate, 4-tert-butylcyclohexyl methacrylate, cyclooctyl methacrylate, phenyl methacrylate or isobornyl methacrylate or mixtures thereof. The present invention additionally relates to processes for the preparation of such coating compositions and to their preferred use as fillers, basecoats and/or topcoats, especially in connection with automotive production-line finishing and/or refinishing.
摘要:
A coating composition consisting of at least three components, comprising a component (I) comprising at least one hydroxyl-containing oligomeric or polymeric resin dispersed or dissolved in one or more organic, optionally water dilutable solvents, as binder (A), a component (II) comprising at least one polyisocyanate dispersed or dissolved in one or more organic, optionally water dilutable solvents, as crosslinking agent (F), and a component (III) which comprises water, wherein component (I) comprises at least one hydroxyl-containing polyacrylate resin (A) containing polyether sidegroups and/or endgroups of the general formula I Y—(—O—R—)n— (I) in which the index and variables have the following meanings: n=3 to 100; R=C2 to C6 alkanediyl and C3 to C8 cycloalkanediyl; Y=hydrogen atom or C1 to C4 alkyl; as binder (A).
摘要翻译:由至少三种组分组成的涂料组合物,其包含分散或溶解在一种或多种有机,任选的水可稀释溶剂中的至少一种含羟基的低聚物或聚合物树脂作为粘合剂(A),组分( II)包含分散或溶解在一种或多种有机,任选水可稀释溶剂中的至少一种多异氰酸酯作为交联剂(F)和包含水的组分(III),其中组分(I)包含至少一个含羟基的 含有聚醚侧基和/或通式Iin的端基的聚丙烯酸酯树脂(A),其指数和变量具有以下含义:n = 3〜100; R = C2〜C6烷二基和C3〜C8环烷二基; Y =氢原子或 C1〜C4烷基;作为粘合剂(A)。
摘要:
The present invention relates to a coating composition consisting of at least three components (I), (II) and (III), component (I) containing as binder (A) at least one acrylate copolymer (A1) which is dispersed or dissolved in organic, optionally water-dilutable solvent and/or one polyester resin (A2) which is dispersed or dissolved in organic, optionally water-dilutable solvent and/or one polyurethane resin (A3) which is dispersed or dissolved in organic, optionally water-dilutable solvent and/or optionally a further binder (A4),component (II) contains at least one nonblocked polyisocyanate as crosslinking agent, andcomponent (III) contains as constituent essential to the invention an aqueous dispersion, prepared in a single- or multistage method, of a hydrophilicized polymer resin HP based on a hydrophobic polymer resin HP' and also, if desired, contains components (A1) and/or (A2) and/or (A3) and/or (A4) in aqueous dispersion.Also described is the use of the novel coating compositions for the finishing of automobile bodies and plastics parts and for automotive refinishing.
摘要:
An aqueous coating material preparable by mixing (A) at least one base paint comprising (a1) at least one optionally water-soluble or -dispersible binder, (a2) at least one color and/or effect pigment, and (a3) at least one water-miscible organic solvent, and further comprising if desired (a4) water, (a5) at least one crosslinking agent and/or (a6) at least one auxiliary and/or additive; (B) at least one solid, finely divided mixing varnish comprising (b1) at least one water-soluble or -dispersible, finely divided, solid binder; and (C) an aqueous medium with one another; and also a modular system for preparing aqueous coating materials, comprising (I) at least one color and/or effect module comprising at least one base paint (A), (II) at least one solid module comprising at least one solid, finely divided mixing varnish (B) and (III) at least one dispersing module comprising an aqueous medium (C).
摘要:
A coating composition consisting of at least four components, comprising a component (I) comprising at least one oligomeric or polymeric resin containing functional groups which react with isocyanate groups, as binder (A), a component (II) comprising at least one polyisocyanate as crosslinking agent (F), a component (III) which comprises water and is substantially free from acrylate copolymers (A) dispersed or dissolved therein, and a finely divided solid component (IV) which comprises at least one water-soluble or -dispersible finely divided solid acrylate copolymer (A); and also a process for producing a coating from a coating composition consisting of at least four components, which involves (1) mixing at least one component (I) with at least one component (II), to give the mixture (I/II); (2) mixing at least one component (III) with at least one finely divided solid component (IV), to give the mixture (III/IV); and then either (3) dispersing and/or dissolving the mixture (I/II) in the mixture (III/IV) or (4) dispersing and/or dissolving the mixture (III/IV) in the mixture (I/II); applying the resulting mixture (I/II/III/IV) to the surface that is to be coated, and curing the wet film.
摘要:
The present invention relates to an aqueous multicomponent polyurethane coating composition comprising A) a water-dilutable polyaddition resin (A1) and/or polycondensation resin (A2) containing hydroxyl and carboxylate groups and having an OH number of from 40 to 200 mg of KOH/g, preferably from 60 to 140 mg of KOH/g, an acid number of from 15 to 100 mg of KOH/g, preferably from 25 to 50 mg of KOH/g, and a glass transition temperature of from -40.degree. C. to +60.degree. C., preferably from -20.degree. C. to +40.degree. C., B) a polyisocyanate component (B) as crosslinking agent and C) at least one additive, characterized in that it contains as additive a carbodiimide component (C) which has a content of carbodiimide groups --N.dbd.C.dbd.N-- of from 2 to 30% by weight, on average at least 0.8 carbodiimide groups per molecule and from 0 to 25% by weight, based on solids, of chemically incorporated ethylene oxide and/or propylene oxide units which are present within polyether chains, and/or a polyepoxide component (D).
摘要:
The present invention relates to an aqueous two-component polyurethane coating composition comprising A) a water-dilutable polyacrylate resin (A) having an OH number of from 40 to 200 mg of KOH/g, an acid number of from 20 to 100 mg of KOH/g and a glass transition temperature of from -40.degree. C. to +60.degree. C., andB) a polyisocyanate component as crosslinking agent, characterized in that the water-dilutable acrylate resin is obtainable by solution polymerization, in the presence of a polymerization initiator, of at least one monomer which is free of carboxyl groups, at least one monomer which contains hydroxyl groups, at least one vinyl ester of .alpha.-branched monocarboxylic acids having 5 to 18 carbon atoms per molecule and/or at least one reaction product of acrylic acid and/or methacrylic acid with the glycidyl ester of .alpha.-branched monocarboxylic acids having 5 to 18 carbon atoms per molecule, at least one monomer containing carboxyl groups and, if desired, other monomers which are essentially free of carboxyl groups, and after the end of the polymerization the resulting polyacrylate resin is at least partially neutralized and is dispersed in water.
摘要:
The present invention relates to a coating composition comprising at least three components, characterized in that component (I) contains as binder at least one acrylate copolymer which is dissolved or dispersed in organic solvent and has a number-average molecular weight of between 1000 and 30,000, an OH number of from 40 to 200 and an acid number of from 5 to 150 and/or polyester resin having a number-average molecular weight of between 1000 and 30,000, an OH number of from 30 to 250 and an acid number of from 5 to 150 and/or polyurethane resin having a number-average molecular weight of between 1000 and 30,000, an OH number of from 20 to 200 and an acid number of from 5 to 150, and, if desired, a further binder, the binder components being selected such that a 50% strength solution of the binder in ethoxyethyl propionate has a viscosity at 23° C. of ≦2.5 dPa·s, component (II) contains at least one nonblocked polyisocyanate as crosslinking agent, and component (III) is essentially binder-free and contains water.