摘要:
A curable coating composition comprising an acrylic polymer having an epoxide equivalent weight from about 150 to about 1500, a compound having acid and carbamate groups, and an aminoplast crosslinker may be applied to a substrate and cured at a temperature at which both acid and carbamate groups of the compound react. The composition may further contain a blocked polyisocyanate crosslinker to react with hydroxyl groups on the polymer and/or formed by reaction of epoxide with carboxylic acid groups.
摘要:
The invention provides binder-free spot blender compositions for one-component and two-component clearcoatings containing at least one isocyanate compound, processes for their production and their use in motor vehicle repair finishing.
摘要:
The invention relates to two-component coating systems comprising, as component (a), one or more polyisocyanates; as component (b), one or more oligomeric and/or polymeric compounds which can react with component (a); and, as component (c), one or more phosphonates selected from the group of phosphonic acid diesters and diphosphonic acid diesters, wherein (i) component (b) contains all oligomeric and/or polymeric compounds which can react with component (a) and which are contained in the two-component coating system; and (ii) component (b) contains not more than 15% by weight, based on the total weight of component (b) of oligomeric and/or polymeric compounds which carry amino groups that can react with isocyanate. A further object of the invention is a method for the production of the two-component coating systems and the use of said coating systems as a clear coating, particularly for multilayer automobile coatings.
摘要:
The invention relates to coating materials that can be cured thermally and by actinic radiation and that comprise (A) at least one binder, selected from the group including the random, alternating and block, linear, branched and comb polyaddition resins and polycondensation resins that can be cured thermally or thermally and by actinic radiation, and (co) polymers of olefinically unsaturated monomers, and (B) 0.2 to 20 % by weight, based on the solid content of the coating material, of at least one polyisocyanate that is devoid of blocking agents and that is blocked by the internal formation of uretdione groups up to a breakdown temperature of at least 160 °C. The invention also relates to the use of the inventive coating materials for producing single-layer and multi-layer clear coats and color- or effect-producing multi-layer coatings or as adhesives and sealing materials.
摘要:
Verfahren zur Herstellung von Effektlackierungen, dadurch gekennzeichnet, dass ein effektgebendes oder farb- und effektgebendes Beschichtungsmittel, welches aus einer Matrix und diskreten Polymerteilchen besteht, durch ein Zerstäubungsverfahren oder Tintenstrahldruck einmalig aufgebracht und anschließend ganz oder teilweise durch vollständige oder teilweise Verflüchtigung der flüssigen Phase getrocknet wird.
摘要:
The invention relates to aqueous dispersions, which can be hardened thermally and by using actinic radiation, containing: (I) liquid, highly viscous and/or solid particles that are dimensionally stable under storage and application conditions. Said particles contain: (IA) a binding agent that does not contain any carbon-carbon double bonds, which can be activated with actinic radiation, containing at least one (meth)acrylate copolymer having, in the statistical mean, at least one isocyanate-reactive functional group and at least one dispersed functional group per molecule, and; (IB) at least one blocked polyisocyanate. The aqueous dispersions also contain: (II) liquid, highly viscous and/or solid particles, which are dimensionally stable under storage and application conditions. Said particles contain at least one polyurethane (II) having at least one isocyanate-reactive functional group, at least one functional group with at least one bond that can be activated with actinic radiation, and at least one dispersing functional group. Lastly, the aqueous dispersions contain: (III) at least one unsaturated constituent, which does not contain any isocyanate-reactive functional groups and which, in the statistical mean, contains more than one carbon-carbon double bond per molecule, which can be activated with actinic radiation. The invention also relates to a method for producing the aqueous dispersions and to the use thereof.
摘要:
The invention relates to an aqueous coating agent for metal substrates, comprising a water-dispersible and/or water-soluble polymer P with a gradient in the concentration of covalently bonded hydrophilic groups along the polymer backbone, wherein the polymer P has covalently bonded ligands A which form chelates with the metal ions released on corrosion of the substrate and/or the substrate surface and cross-linked functional groups B which can form covalent bonds with itself, with further complementary functional groups B' on the polymer P and/or with further functional groups B and/or B' on cross-linkers V.