摘要:
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 21.5% by weight of (cyclo)aliphatically bound isocyanate groups and, optionally, 2 to 20% by weight of ethylene oxide units present within polyether chains, the polyether chains containing a statistical average of 5 to 70 ethylene oxide units, wherein the components are present in quantities corresponding to an equivalent ratio of isocyanate groups of component b) to alcoholic hydroxyl groups of component a) of 0.2:1 to 5:1. The present invention also relates to a process for the production of these coating compositions and to coated water-resistant substrates prepared from these coating compositions.
摘要:
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.
摘要:
The present invention relates to polyisocyanate mixtures havinga) an average NCO functionality of 1.5 to 4.0,b) a content of (cyclo)aliphatically bound isocyanate groups (calculated as NCO, MW 42) of 2 to 40% by weight,c) a content of chemically incorporated carboxyl groups (calculated as COOH, MW 45) of 0.01 to 15% by weight andd) a content of (cyclo)aliphatically bound uretdione groups (calculated as C.sub.2 N.sub.2 O.sub.2, MW 84) of 1 to 23% by weight.The present invention also relates to processes for the production of these polyisocyanate mixtures and to their use, optionally after at least partial neutralization with tertiary amines, as binders for coating compositions which may be crosslinked under the effect of moisture and/or heat and as reactants for compounds containing isocyanate- and/or carboxyl-reactive groups in the production of high molecular weight plastics.
摘要翻译:本发明涉及具有a)平均NCO官能度为1.5至4.0的多异氰酸酯混合物,b)(环)脂族结合的异氰酸酯基团含量(以NCO计,MW 42计)为2-40重量%,c)a 化学引入的羧基含量(按COOH计算,MW 45)为0.01〜15重量%,d)(环)脂族结合的脲二酮基(C 2 N 2 O 2,MW 84计算)的含量为1〜23重量%。 本发明还涉及生产这些多异氰酸酯混合物的方法及其用途,任选地在用叔胺至少部分中和之后,作为可在水分和/或加热和作为反应物的作用下交联的涂料组合物的粘合剂 对于在高分子量塑料生产中含有异氰酸酯和/或羧基反应性基团的化合物。
摘要:
A water-dispersible polyisocyanate composition obtained by the partial urethanization of the isocyanate groups of 2,4- and/or 2,6-diisocyanatotoluene with monohydric and polyhydric alcohols, a process for its production, its use as the binder for an aqueous two-component coating composition in combination with a water-soluble or water-dispersible polyhydroxyl component and coatings for water-resistant sheet-form substrates prepared from this coating composition.
摘要:
The present invention relates to coating compounds of which the binder consists essentially of a combination of a) a polyol component dissolved and/or dispersed in water or a water/solvent mixture, and b) a polyisocyanate component emulsified in the solution and/or dispersion of the polyol component with a viscosity at 23° C. of 50 to 10,000 mPa.s, in quantities corresponding to an equivalent ratio of isocyanate groups of component a) to alcoholic hydroxyl groups of component b) of 0.5:1 to 5:1, characterized in that component consists essentially of a1) a water-dilutable, hydroxyfunctional polycondensate resin free from urethane and sulfonate groups and having a molecular weight Mn above 500 or a2) a mixture of such a polycondensation resin with up to 100% by weight, based on the weight of the polycondensation resin, of at least one water-dilutable, hydroxyfunctional polymerization resin having a molecular weight Mn above 500. The present invention also relates to a process for the preparation of these coating compounds and to their use for the production of coatings.
摘要:
Water-dispersible polyisocyanate compositions based on aliphatic and aromatic diisocyanates and having an NCO content, based on solids, of 6 to 21% by weight, a weight ratio of incorporated TDI units to incorporated HDI units of 6:1 to 0.1:1 and a content of ethylene oxide units, arranged within terminal polyether chains, of 5 to 40% by weight; a method for the preparation of these polyisocyanate compositions by reacting a polyisocyanate component with monovalent polyether alcohols containing ethylene oxide units at an NCO/OH equivalent ratio of 2:1 to 120:1; and aqueous coating compositions containing these polyisocyanate compositions and polyhydroxyl compounds as the binder.
摘要:
An aqueous two-component coating agent whose binder consists essentially of a combination of a) a polyol component present dissolved and/or dispersed in water comprising a1) at least one water-dilutable polymerisation resin or polycondensation resin with a molecular weight Mn of over 500 possessing hydroxyl groups and a2) a reactive diluent consisting of at least one water-soluble compound with a molecular weight Mn of under 500 capable of reacting with isocyanate groups and b) a polyisocyanate component with a viscosity at 23.degree. C. of from 50 to 10 000 mPa present emulsified in the aqueous solution or dispersion, a method for producing such coating agents wherein the said polyisocyanate component is emulsified in the said aqueous solution or dispersion with the optional incorporation of auxiliary substances and additives in the system prior to adding the polyisocyanate, and the use of the coating agents for the production of air-drying and/or heat-drying coatings.
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:
The present invention is directed to a two-component coating composition which contains as binder componentsa) a polyol component containing at least one hydroxyl-containing polymer having chemically incorporated carboxylate and/or sulfonate groups and based on olefinically unsaturated compounds andb) a polyisocyanate component having a viscosity at 23.degree. C. of about 50 to 10,000 mPa.s and based on at least one organic polyisocyanatein quantities corresponding to an NCO/OH equivalent ratio of about 0.5:1 to 5:1, characterized in that component a) is an aqueous solution and/or dispersion of a polymer containing hydroxyl groups in which the polyisocyanate component b) is present in emulsified form.The present invention also relates to a process for the production of this coating composition which is characterized in that a polyisocyanate component having a viscosity at 23.degree. C. of about 50 to 10,000 mPa.s and based on at least one organic polyisocyanate is emulsified in an aqueous solution or dispersion of one or more polymer resins containing hydroxyl groups and chemically incorporated sulfonate and/or carboxylate groups in a quantity which makes them soluble and/or dispersible in water, the quantitative ratios between the two components corresponding to an NCO/OH equivalent ratio, based on the isocyanate groups of the polyisocyanate component and the incorporated hydroxyl groups of the polymer component, of about 0.5:1 to 5:1.
摘要:
The present invention relates to an aqueous binder composition containingA) an aqueous solution or dispersion of a water-dilutable organic polyol component containing at least one polyester resin having carboxylate and hydroxyl groups and grafted with vinyl monomers 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 binder composition has an NCO/OH equivalent ratio of 0.5:1 to 5:1, based on the isocyanate groups of component B) and the alcoholic hydroxyl groups of component A).The present invention also relates to a process for the production of a coating or sealing composition containing this aqueous binder composition.