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 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.
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:
An aqueous binder composition having a reduced tendency to yellow containingA) 20 to 95 wt-% of a water-dilutable organic polyol component that is present in the form of an aqueous solution or dispersion, contains one or more polymer-modified polyester resins which contain carboxylate groups and hydroxyl groups and has been prepared by the polymerization of olefinically unsaturated monomers in the presence of an unsaturated polyester resin that is copolymerized with the monomers andB) 5 to 80 wt-% of at least one heat-activatable cross-linking resin,wherein the percentages are based on the solids contents of components A) and B) and add up to 100%; and their use in heat-curable coating compositions.
摘要:
The present invention relates to a process for the production of oxidatively crosslinkable, water-dilutable binders bya) forming a copolymer having intramolecular carboxylic anhydride groups by copolymerizing anhydride-functional compounds, other olefinically unsaturated monomers and 5 to 50% by weight, based on the weight of the olefinically unsaturated monomers used for the production of the copolymers a), of monomers which cannot be homopolymerized under the reaction conditions,b) subsequently reacting by ring-opening esterification at least 50% of the anhydride groups present in the copolymer with one or more unsaturated monohydric alcohols,c) reacting by ring-opening esterification up to 50% of the anhydride groups with monohydric saturated alcohols having a molecular weight of 32 to 200 either before, during or after step b),d) optionally reacting 1 to 70% of the carboxyl groups formed in steps b) and c) with organic epoxide compounds ande) neutralizing at least a portion of the carboxyl groups formed in steps b) and c).The present invention also relates to the binders obtained by this process and to their use in water-dilutable lacquers and coating compositions.
摘要:
The present invention relates to a process for preparing aqueous binders for aqueous coating compositions by reacting a mixture of A) 9.9 to 85 wt. % of a hydroxy- and acid-functional poly(meth)acrylate andB) 14.9 to 90 wt. % of a hydroxy-functional, fatty acid-modified polyester with C) 0.1 to 20 wt. % of a diisocyanate having a molecular weight of 140 to 318, to form urethane groups and then dissolving or dispersing the reaction product in water with prior or simultaneous neutralization of at least a portion of the carboxyl groups present, wherein the sum of the percentages of A) to C) add up to 100. The present invention also relates to the aqueous binders obtained by this process and their use, optionally combined with other oxidatively drying lacquer resins, in air- and/or heat-drying, two-component coating compositions, preferably aqueous polyurethane coating compositions, or in combination with optionally blocked polyisocyanates and/or amino cross-linking agents in aqueous heat-curing coating compositions.
摘要:
The present invention relates to aqueous solutions or dispersions of hydroxy-functional copolymers containing imide structural units corresponding to the formula ##STR1## The present invention also relates to a process for the production of these aqueous solutions or dispersions of hydroxy-functional copolymers containing imide structural units by reacting anhydride-functional and optionally carboxyl-functional copolymers corresponding to the hydroxy-functional copolymers with aminoalcohols and optionally aminocarboxylic acids. In a further embodiment of the process the hydroxy-functional copolymers may be reacted with lactones resulting in ring opening and the formation of ester groups.
摘要:
The present invention concerns a process for the production of cement clinker in rotary kilns with substitution of primary raw materials and fuels by use of residual materials containing minerals and combustible parts with moisture contents of up to about 65% without predrying. The process makes possible a material and/or thermal utilisation of residual materials in the case of saving of the clay and fuel sources and relief of dumping with simultaneous lowering of the emissions, above all NO.sub.x, in the cement rotary kiln.
摘要:
The present invention relates to a process for recovering and recycling the organic binder components accumulating as overspray during the spraying of a solvent-containing, two-component polyurethane lacquer or a solvent-containing, moisture-curing, one-component polyurethane lacquer byi) washing the overspray out of the exhaust air of a coating plant with the aid of an aqueous medium which a) contains in dissolved or dispersed form compounds that exhibit greater reactivity towards isocyanate groups than either water or the isocyanate-reactive groups present in two-component polyurethane lacquers, and b) may contain emulsifiers,ii) isolating the chemically modified overspray formed in step (i) in the form of lacquer sludge by treatment with coagulating agents, which may be present in the aqueous medium,iii) mixing the lacquer sludge, containing fully reacted lacquer constituents, coagulating agents and water, optionally after a portion of the water is removed, with an organic solvent andiv) separating the organic phase accumulating in step iii) from the aqueous phase and insoluble-constituents which may be present and recovering the solution of modified organic binder components dissolved in the organic phase.
摘要:
A method and apparatus for producing histological sections by means of a microtome are suggested. A histological section of predefined thickness is produced with a microtome from a block comprising a tissue sample. A carrier material is applied with an application apparatus onto the block prior to before production of the histological section. To ensure that the histological sections do not roll up, and to enable improved downline processing of the histological sections as compared with a carrier material embodied in the form of an endless strip and that the carrier material is cut out prior to application to a size and/or a shape that corresponds substantially to the cross-sectional area of the block; and that the cut-out carrier material is then applied onto the block. The suggested apparatus is designed to apply the carrier material onto a histological section to be prepared by a microtome.