Abstract: Described herein is an improved process for anticorrosion pretreatment of a metallic surface including steel, galvanized steel, aluminum, an aluminum alloy, magnesium and/or a zinc-magnesium alloy, wherein the metallic surface is brought into contact with i) an acidic aqueous composition A which includes a1) at least one compound selected from the group consisting of titanium, zirconium and hafnium compounds, and with ii) an aqueous composition B which includes b1) at least one (meth)acrylate resin and b2) at least one phenol resin, where the metallic surface is brought into contact firstly with the composition A and then with the composition B and/or firstly with the composition B and then with the composition A and/or simultaneously with the composition A and the composition B.

Abstract: Described herein is an improved process for anticorrosion pretreatment of a metallic surface including steel, galvanized steel, aluminum, an aluminum alloy, magnesium and/or a zinc-magnesium alloy, wherein the metallic surface is brought into contact with i) an acidic aqueous composition A which includes a1) at least one compound selected from the group consisting of titanium, zirconium and hafnium compounds, and with ii) an aqueous composition B which includes b1) at least one (meth)acrylate resin and b2) at least one phenol resin, where the metallic surface is brought into contact firstly with the composition A and then with the composition B and/or firstly with the composition B and then with the composition A and/or simultaneously with the composition A and the composition B.

Abstract: The present invention relates to a process for producing shaped bodies, in particular cores, molds and feeders in foundry technology, which comprises the following steps: a. Preparation of a composition comprising i. at least one phenolic resin in solid form, ii. at least one polyisocyanate, and iii. at least one refractory material, with the composition being prepared at a temperature which is below the melting point of the at least one phenolic resin; b. Molding of the composition to form a shaped body; c. Raising of the temperature of the composition to above the melting point of the at least one phenolic resin to cure the mixture. The invention also relates to shaped bodies, in particular cores, molds and feeders for foundry technology, which are obtainable by this process, and also a composition as is used in this process.

Abstract: The present invention relates to a coating composition comprising one or more hydroxyl-containing, modified or nonmodified polyesters and one or more hydroxyl-reactive crosslinkers, characterized in that the coating composition comprises as binder a mixture of A1) from 35 to 95% by weight of one or more hydroxyl-containing polyesters (A1) having an OH number of from 15 to 210 mg of KOH/g, an acid number of from 10 to 120 mg of KOH/g and a number-average molecular weight of from 500 to 6,000 g/mol, A2) from 2 to 50% by weight of one or more water-thinnable, modified epoxy resin esters (A2), and A3) from 0 to 20% by weight of one or more water-thinnable, hydroxyl-containing, epoxy resin-modified alkyd resins (A3), the sum of the proportions by weight of components (A1) to (A3) being in each case 100% by weight and the proportions by weight being based in each case on the solids content of the binders (A1) to (A3).

Abstract: The invention relates to solvent-free coating compositions which can be cured with low emissions and comprise, as binders, saturated and/or unsaturated polyesters whose structural units include dihydrodicyclopentadiene units of the formula (I): ##STR1## and/or oligodihydrodicyclopentadiene units of the formula (II): ##STR2## where n=1 to 10, to processes for the production of coatings using the novel coating compositions, and to the use of the coating compositions for coating metal containers, especially cans.

Abstract: An aqueous polymer dispersion, comprising an at least 20% neutralized, free-radical polymerized product of A and B in a ratio of one part A to from 0.5 to 9.0 parts B by weight; whereinA consists essentially of from 2.5 to 13% by weight of at least one acid group-containing, ethyleneically unsaturated monomer and from 87 to 97.5% by weight of at least one ethylenically unsaturated monomer that is free from acid groups, and further whereinB is a reaction product of at least one compound containing at least 1.5 epoxide groups per molecule on average and at least one member of the group consisting of:(1) mixtures of ethylenically unsaturated monocarboxylic acids, saturated fatty acids, and monoesters of ethylenically unsaturated dicarboxylic acids and saturated fatty alcohols; and (2) mixtures of saturated fatty acids and monoesters of ethylenically unsaturated dicarboxylic acids and saturated fatty alcohol.

Abstract: The invention relates to a process for spray-painting with aqueous paints, in which paints with different colors are processed, recovered paint is recycled, if desired after admixing with newly supplied paint (fresh paint), to the coating operation, and(a) the substrates are selected such that some of the substrates can painted using a mixture of the paints with different colors ("mixed paint"), and(b) the substrates are selected such that the proportion of the paints with different colors in the overall amount of paint processed is from 10 to 90% by weight, and(c) the substrates are selected such that the proportion in which the paints with different colors are processed corresponds to the proportional content of the paints with different colors in the mixed paint, and/or(d) care is taken, by selecting the color of the fresh paint which is admixed, to ensure that the recovered paint has the same color as the mixed paint.