Hoechst Aktiengesellschaft

Vianova Resins, Inc.

Uwe Kubillus

Ulrich Epple

Holger Schmidt

Harald Oswald

Manfred Marten

Helmut Plum

Gerd Walz

Gerhard Brindopke

Peter Ziegler

Gerhard Brindoepke

Michael Honel

Andrea Travers-Hemmer

Tanja R Brueck

Petra Schaub

Epoxide-amine adducts having a proportion by mass of at least 20% of aliphatic epoxide or amine units which comprise at least one tertiary or quaternary carbon atom are disclosed. The adducts are employed as binders for coatings of relatively high environment-friendliness, if desired, for example, in a mixture with other hydroxy-functional binders, and as reactive component in corresponding adhesive compositions and sealing compounds.

Aliphatic epoxide-amine adducts with substantial side-chain branching,

Aliphatic epoxide-amine adducts with substantial side-chain, branching

Low molar mass copolymers which can be prepared by reacting one or more glycidyl esters of saturated aliphatic monocarboxylic acids having a tertiary or quaternary .alpha. carbon atom, and at least two unsaturated copolymerizable monomers of which at least one has at least one COOH group, under the conditions of a free-radical copolymerization, whereby the weight-average molar mass of the copolymers is below 3500 g/mol and the proportion of branched side chains in the copolymer is at least 20% by mass are disclosed. Also disclosed are methods of making these copolymers and the use thereof in binder and coating systems.

Hydroxyl-functional copolymers of low molar mass with substantial

Low-viscosity copolymers useful in coating compositions, containing hydroxyl and carboxyl groups are obtained by free-radical polymerization of A) from 3 to 50% by weight of one or more glycidyl esters of aliphatic saturated monocarboxylic acids having a tertiary or quaternary .alpha. carbon atom, and B) from 97 to 50% by weight of at least two olefinically unsaturated copolymerizable monomers of which at least one contains at least one COOH group and at least one is sterically hindered, the quantity of COOH groups in component B exceeding the quantity of epoxy groups in component A to such an extent that the resulting copolymer has an acid number of at least 15 mg of KOH/g.

Copolymers containing hydroxyl and carboxyl groups by reacting glycidyl

Copolymers of particularly low viscosity, which can be prepared by a polymerization in bulk, in which one component (A) is initially charged and, in the further course of the polymerization, at least two olefinically unsaturated copolymerizable monomers (B) are added, of which at least one contains at least one COOH group and at least one is sterically-hindered are usefully employed in coating compositions.

Copolymers, their preparation, and their use in high-solids coating

Water-dilutable dispersions of acrylate copolymers having a hydroxyl number of from 40 to 200 mg KOH/g and an acid number of from 15 to 50 mg of KOH/g, obtained by free-radical copolymerization of

Aqueous dispersions of acrylate copolymers

Liquid coating agent based on a polymer containing acetoacetate groups and a polyamine in the form of the corresponding aldimine or ketimine, the polymer containing acetoacetate groups being obtained by reaction of a polyepoxide with water, an amine or a hydroxycarboxylic acid and subsequent esterification or transesterification with acetoacetic acid. These liquid coating agents are particularly suitable as binders in two-component automobile repair fillers or as two-component primers.

Liquid coating agent based on transesterified, modified epoxy resins and

The invention relates to a curing component (A) containing active CH groups, which contains at least two groups of the formula (I) ##STR1## or structural units of the formula (I') or (I') ##STR2## in which: A denotes ##STR3## X and Y are identical or different and denote ##STR4## CO.sub.2 R.sup.1, CN, NO.sub.2, CONH.sub.2, CONR.sup.1 H or CONR.sup.1 R.sup.1, where the R.sup.1 radicals may be identical or different and represent a hydrocarbon radical, preferably an alkyl radical having 1 to 12 carbon atoms, which may also be interrupted by oxygen or an N-alkyl radical, with the proviso that only one of the two radicals X and Y may represent the NO.sub.2 group;

Curing component, and the use thereof

The invention relates to the use of crosslinked polymer microparticles having an average particle size of at most 5 .mu.m and a glass transition temperature (Tg) of at least +30.degree. C. in aqueous paint preparations as filler and/or as partial substitute of white pigments, in particular of titanium dioxide. Among other things, the corresponding paints show increased spreading power, less tendency for sedimentation and reduced crater formation.

Growing community of inventors

Wiesbaden, Germany

Uwe Kubillus