摘要:
The present invention relates to a water-based binder composition containingA) an aqueous solution or dispersion of a water-dilutable organic polyol component containing a mixture of at least 5% by weight each of at least two hydroxy-functional polymers selected fromA1) polyester resins containing hydroxyl, urethane and carboxylate groups,A2) polyester resins containing hydroxyl and carboxylate groups, but no urethane or sulfonate groups,A3) polyester resins containing hydroxyl and sulfonate groups and, optionally, carboxylate groups and/or urethane groups,A4) polyacrylate resins containing hydroxyl, carboxylate and/or sulfonate groups,A5) acrylate-grafted polyester resins containing hydroxyl, carboxylate and/or sulfonate groups, andB) a polyisocyanate component which is emulsified in the aqueous solution or dispersion A), has a viscosity at 23.degree. C. of 50 to 10,000 mPa.s and contains at least one organic polyisocyanate,wherein the NCO:OH equivalent ratio, based on the isocyanate groups of component B) and the hydroxyl groups of the polyol component present in A), is 0.2:1 to 5:1.The present invention also relates to a process for the production of a coating or sealing composition containing this aqueous binder composition.
摘要:
A coating composition in which the binding agent is a two-component system containing a) a polyisocyanate component and b) an isocyanate-reactive component and contains b1) specific ester group-containing secondary polyamines, b2) specific moisture-activatable blocked polyamines and b3) optionally other known compounds containing isocyanate-reactive groups, and a process for preparing coated substrates from this coating composition.
摘要:
The present invention relates to a process for the preparation of alkoxylation products of organic carboxylic acids containing alcoholic hydroxyl groups by the reaction of any organic compounds containing at least one carboxyl group with alkylene oxides in an alkoxylation reaction in the presence of catalysts, characterized in that the catalysts used are phase transfer catalysts selected from the group consisting of(a) tetraalkylammonium or tetraalkylphosphonium halides in which the sum of carbon atoms of the alkyl groups is at least 8,(b) basic alkali metal compounds converted into complexes with crown ethers and(c) complexes of (i) basic alkali metal compounds and (ii) acyclic organic compounds containing at least 5 alkylene oxide units of the formula --R--O-- (R=C.sub.1 -C.sub.4 -alkylene) in the form of one or more polyether chains having at least 3 alkylene oxide units, said compounds having a molecular weight of at least 238 and containing a total of at least 40% by weight of alkylene oxide units of the type indicated in polyether chains having at least 3 alkylene oxide units.The present invention also relates to the use of these alkoxylation products for the production of polyurethanes by reaction with organic polyisocyanates.
摘要:
Oxidatively cross-linkable, water dilutable binders suitable for lacquers, coating compositions and sealing compounds are modified co-polymers of olefinically unsaturated compounds, having a molecular weight of 6000 to 160,000 and having for each 100 grams of solids content, a total of from60 to 250 milliequivalents of chemically incorporated carboxyl groups, of which from 10 to 100% are neutralized thereby rendering the product dilutable in water andfrom 15 to 50% by weight of chemically incorporated moieties corresponding to the formula--O--RwhereinR represents an olefinically monounsaturated or polyunsaturated aliphatic hydrocarbon having a molecular weight above 166 and containing from 12 to 22 carbon atoms, are prepared by:(a) preparing a co-polymer having a molecular weight from 5000 to 80,000, determined by gel permeation chromatography, and having intramolecular carboxylic acid anhydride units corresponding to the formula ##STR1## and an anhydride equivalent weight of from 240 to 1960 by a radically initiated co-polymerization of olefinically unsaturated dicarboxylic acid anhydrides with other olefinically unsaturated monomers,(b) reacting at least 50% of the acid anhydride units present in the co-polymer from (a) with an unsaturated monohydric alcohol corresponding to the formulaR--OH with anhydride ring opening ester formation, and(c) converting the free carboxyl groups in the reaction product of (b) to an extent of 10 to 100% into carboxylate groups by neutralization of the carboxys with a base.
摘要:
The present invention relates to heat and storage stable vinyl polymer polyol secondary dispersions containing A) at least one vinyl polymer resin having functional groups selected from hydroxyl, carboxyl and/or sulfonic acid groups and dispersed in a water/solvent mixture in the presence of a neutralizing agent, and B) at least one amphiphilic polymer built up from a hydrophobic and a hydrophilic segment. The invention also relates to a process for the preparation of the vinyl polymer polyol secondary dispersions by preparing vinyl polymer resin A) by polymerizing a mixture of ethylenically unsaturated monomers a) in the presence of an initiator b) in a water/solvent mixture and adding at least one amphiphilic polymer B), then at least partly neutralizing and dispersing the resulting product, optionally after the addition of a further amount of water.
摘要:
A reaction product of an acrylate resin containing glycidyl groups and secondary mono-amines containing hydroxyl groups, obtained by reacting of said acrylate resin of copolymerized, statistically distributed units of(A) 3 to 30% by weight of the glycidyl ester of (meth)acrylic acid and/or of vinyl glycidyl ether;(B) 0 to 20% by weight of at least a hydroxy C.sub.2 -C.sub.4 alkyl ester of (meth)acrylic acid;(C) 5 to 80% by weight of at least an optionally substituted styrene, methyl methacrylate, (meth)acrylonitrile or any mixture thereof;(D) 5 to 70% by weight of an acrylic acid C.sub.1 -C.sub.12 -alkyl-or of a methacrylic acid C.sub.2 -C.sub.12 -alkyl ester or any mixture thereof; and(E) 0 to 10% by weight of an .alpha.,.beta.-mono-olefinically unsaturated monocarboxylic or dicarboxylic acid containing from 3 to 5 carbon atoms or of a maleic acid C.sub.2 -C.sub.14 -mono ester or any mixture thereof,with at least one secondary mono-amine containing at least one secondary hydroxyl group. The reaction products are useful for crosslinking polyisocyanates.
摘要:
A binder for a coating composition is a combination of(a) polymers containing intramolecular carboxylic anhydride groups and having an average molecular weight of from 500 to 25,000 and(b) organic compounds containing 4,5-dihydrooxazole groups in a quantity corresponding to an equivalent ratio of carboxylic anhydride groups to 4,5-dihydrooxazole groups of from 0.5:1 to 2:1, and contains from 0.005 to 5% by weight, based on the weight of components (a) and (b), of ammonia, a primary amine or secondary amine.
摘要:
A moisture-curing binder composition useful in paints and other coating compositions is prepared by mixing or mixing with spontaneous reaction in the absence of moistureA) 30 to 99 parts by weight of at least one compound containing at least two intramolecular carboxylic anhydride groups andB) 1 to 70 parts by weight of organic compounds having blocked amino groups, wherein B)comprises organic compounds containing hydrogen atoms which are reactive to acid anhydride groups and containing bicyclic amide acetal or bicyclic amide groups or both, wherein the ratios of the amounts of the individual components are chosen such that, by taking into account the addition reaction which occurs spontaneously between components A) and B) in the absence of moisture, in the resulting mixture 0.25 to 50 anhydride groups are present per bicyclic amide acetal and bicyclic amide aminal group.
摘要:
A moisture-hardening binder composition for lacquer of coating compositions is prepared by mixing(A) 50 to 97 parts by weight of copolymers of maleic anhydride with olefinically unsaturated monomers, said copolymers containing succinic anhydride units and having molecular weights Mw of 1,500 to 75,000 with(B) 3 to 50 parts by weight oxazolanes having a molecular weight Mw of 87 to 10,000,the quantitative ratios of (A) to (B) being such that the composition contains 0.25 to 10 anhydride groups for every oxazolane group,wherein component (A) consists essentially of copolymers of(a) 4.5 to 45 parts by weight of maleic anhydride,(b) 5 to 80 parts by weight of monomers of the formulae ##STR1## or both, and (c) 15 to 92 parts by weight of monomers of the formula ##STR2## wherein, R.sub.1 and R.sub.4 is each, independent of the other, an aliphatic or cycloaliphatic C.sub.1 -C.sub.12 hydrocarbon radical with or without oxygen, sulfur or nitrogen as a heteratom, R.sub.2 is hydrogen, methyl, ethyl, chlorine or fluorine,R.sub.3 is a C.sub.2 -C.sub.15 aliphatic hydrocarbon radical, a C.sub.5 -C.sub.10 cycloaliphatic hydrocarbon radical, a C.sub.7 -C.sub.18 araliphatic hydrocarbon radical, a C.sub.6 -C.sub.12 aromatic hydrocarbon radical, chlorine, fluorine, nitrile or a C.sub.2 -C.sub.18 hydrocarbon radical containing one or more heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen in the form of ether, ester, amide, urethane, urea, thioester, oxirane, ketone, lactam or lactone groups.
摘要:
The present invention relates to polyester polyols having a hydroxyl number of 60 to 400, which are esterification products of a) an alcohol component containing one or more aliphatic or cycloaliphatic alcohols having at least 3 hydroxyl groups and 3 to 8 carbon atoms with b) a carboxylic acid component containing itaconic acid, maleic acid, their anhydrides and/or fumaric acid, provided that at least 10 mole % of either component a) or component b) is an aliphatic or cycloaliphatic, saturated or unsaturated monoalcohol or monocarboxylic acid having 1 to 18 carbon atoms. The present invention also relates to two-component polyurethane coating compositions containing these polyester polyols and lacquer polyisocyanates as the binder and to their use for coating substrates, in particular automotive substrates.