Abstract: New modified polyester resin/organic peroxide systems for powder coatings which are applicable to temperature sensitive and metallic substrates include (a) a polyester resin which is a hydroxylated or carbonxylated polyester with unsaturation in its chain, and (b) an organic peroxide with a minimum curing temperature of between 140° and 190° C.; the relative proportions of resin and organic peroxides being 55-60% by weight of resin based on the final composition and 0.5-3.0 by weight of organic peroxide based on the final formulation. These systems find their main application in the manufacture of powder coatings for the coating of temperature sensitive substrates like plastics and metallic substrates, especially aluminum substrates, using the systems currently existing in industry.

Abstract: An externally crosslinkable aminopoly(meth)acrylate resin free from epoxy groups for water-dilutable lacquers having an amine number of from 30 to 150 and a hydroxyl number of from 30 to 450, obtainable by reacting a poly(meth)acrylate resin containing epoxy groups and having an average molecular weight (Mn) of from 600 to 10,000 and an epoxy equivalent weight of from 300 to 4000 with an excess of primary and/or secondary monoamines and/or amionoalcohols to react all the free epoxy groups with the amine groups and distilling off the unreacted excess amine compound, a process for its production and its use. The invention also relates to a CED bath which contains these aminopoly(meth)acrylate resins and crosslinking agents and, optionally, hydroxyfunctional resins and to its use for coating objects.

Abstract: Non-aqueous lacquer with high resistance to stone chipping, containing, as binder, a mixture of film forming, hydroxyl-containing copolymers with blocked polyisocyanates which have been obtained by the reaction of polyhydroxyl compounds containing 2 to 4 hydroxyl groups per molecule and having a molecular weight of from 400 to 2,000 with aliphatic and/or cyclo aliphatic diisocyanates, the ratio of isocyanate groups to hydroxyl groups being in the range of from 2.2 to 1.7, followed by reaction of the remaining free isocyanate groups with acetoacetic acid alkyl esters containing, as alkyl groups, methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl or sec.-butyl groups, a process for its preparation, and its use.

Abstract: A cathodically precipitable aqueous electro-dipcoating agent which includes as Component A, 50 to 99% by mass (relative to the total quantity of Components A and B) of a synthetic resin binder having tertiary amino groups and hydroxyl groups which can be rendered water soluble by protonation with acids, and which(a) has an amine number of 35 to 120,(b) has a hydroxyl number of 50 to 400,(c) has substantially no primary, secondary and quaternary amino groups,(d) has substantially no free isocyanate groups, and(e) has substantially no blocked isocyanate groups which can react at baking temperatures of up to 200.degree. C. with hydroxyl groups present in the reaction components.The agent also includes as Component B, 1 to 50% by mass (relative to the total quantity of Components A and B) of substantially non-acid synthetic resins having at least two terminal esterified carboxyl groups which can react under normal lacquer baking conditions with Component A, accompanied by cross-linkage.

Abstract: Aqueous electrodip lacquer coating compound capable of being deposited cathodically, containing, as synthetic resin binder,(A) 55 to 95% by weight of synthetic resin binder which can be rendered water soluble by protonation with acid and(B) 5 to 45% by weight of a cross-linking agent containing ester groups capable of transesterification and/or transamidation and having terminal ester groups which are substantially stable in a neutral aqueous medium but capable of reacting with synthetic resin binder (A) in an alkaline medium at temperatures above 140.degree. C., component (A) containing in its molecule at least one molecule-enlarging diamine of the formula ##STR1## wherein the symbol Y stands for H or C.sub.m H.sub.2m+1 (m=1 to 8) or an organic group used for defunctionalization, which is formed by the reaction of the primary amino group with monoepoxides, and the symbol X represents a molecular grouping having at least one amide and/or urea group.

Abstract: Aqueous electrodip lacquer coating compound capable of being deposited cathodically, containing, as synthetic resin binder,(A) 55 to 95% by weight of synthetic resin binder which can be rendered water soluble by protonation with acid and(B) 5 to 45% by weight of a cross-linking agent containing ester groups capable of transesterification and/or transamidation and having terminal ester groups which are substantially stable in a neutral aqueous medium but capable of reacting with synthetic resin binder (A) in an alkaline medium at temperatures above 140.degree. C., component (A) containing in its molecule at least one molecule-enlarging diamine of the formula ##STR1## wherein the symbol Y stands for H or C.sub.m H.sub.2m+1 (m=1 to 8) or an organic group used for defunctionalization, which is formed by the reaction of the primary amino group with monoepoxides, and the symbol X represents a molecular grouping having at least one amide and/or urea group.

Abstract: Process for producing storable concentrates for producing paints containing water, undissolved, finely divided, as well as dissolved synthetic resins as paint binders, pigments, optionally paint additives and organic solvents by wet grinding in several stages, wherein(a) in a first grinding stage the undissolved synthetic resins, whereof at least 80% by weight are present with a particle size between 500 .mu.m and 20 mm, mixed with water, the solids content representing 30 to 70% by weight, based on the total mixture quantity, as well as 0 to 60% by weight of dissolved ionic synthetic resins (solids) are ground to a particle size of less than 200 .mu.m and preferably less than 100 .mu.m, and(b) 40 to 100% by weight of the dissolved ionic synthetic resins (solids) and pigments are added and the mixture is ground in a second grinding stage until 95% of all the particles have a particle size of less than 15 .mu.m.

Abstract: The coating of hollow bodies open on one side, such as cans, with paints such as clear or pigmented lacquers, enamels or the like give rise to difficulties for a continuous one-step operation. In the coating process, the cans are first washed, then coated inside and outside, dried and optionally printed and again dried. The difficulties of a continuous one-step operation are solved by utilizing an electro-dipcoating bath and by employing a process wherein the cans are immersed in the electro-dipcoating bath vertically and with the closed bottom downward into the bath, filled from the top with the bath liquid and during the raising from the bath, tilted so that their opening is pointing downward. The cans may also be forcibly immersed with their opening below the surface of the bath for filling with the bath liquid by means of a filler device. Uniform coatings of a plurality of hollow bodies in a continuous one-step coating process are thereby achieved.

Abstract: Aqueous coating composition, particularly for electrophoretic coating, containing, related to the total quantity of the binders contained in the coating composition,(A) 40 to 90% by weight of polyesters containing carboxyl groups;(B) 5 to 30% by weight of block polyisocyanates;(C) 5 to 40% by weight of polymers containing glycidyl groups and containing free epoxy groups; and(D) 0 to 20% by weight of hydroxyl group-containing polyesters and/or acrylic resins,and a process for the preparation of these aqueous coating compositions. The invention also relates to the use of these coating compositions for the production of coatings, particularly by the electrophoretic coating process.