PROCEDURE FOR THE PRODUCTION OF NETWORKING COMPONENTS AND THEIR USE FOR LACQUER BONDING AGENTS

PROCEDURE FOR THE PRODUCTION OF SELF-BRANCHED ONES OF KATHIONI LACQUER BONDING AGENTS AND THEIR USE

LIQUID COATING AGENT

Curing agent for synthetic resins, curable compositions containing the same and their use

Products of the reaction of (a) a polyisocyanate, (b) a CH-acidic alkyl ester, (c) a polyoxyalkyleneamine and (d), if desired, a further NH- and/or OH-reactive compound as curing component for binders (B) which contain groups which are capable of forming amides and/or esters. Mixtures of (A) and (B) and optionally diluents (C) and additives (D) have a long shelf life, even in aqueous systems, and are particularly suitable for aqueous paint formulations.

METHOD FOR PRODUCING PIGMENTED POWDER COATINGS

METHOD FOR PRODUCING CATHODICALLY DEPOSIBLE PREPARATIONS WITH LOW CONTENT OF ORGANIC SOLVENTS

Electrodepositable stable coating preparation essentially comprising a synthetic resin (A), which contains amino groups and, if appropriate, hydroxyl groups, a hardener (B) which is capable of transesterification and/or transamidation, water as diluent (C), if appropriate, organic solvents (D), and also the conventional coating additives and, if appropriate, hardening catalysts (E), wherein the organic solvents content is a maximum of 10% by weight, relative to the solids content. The invention furthermore relates to a process for the preparation of this coating preparation, which is distinguished by a low organic solvents content with good storage stability.

Process for preparing copolymers containing OH groups, and their use

A process for the preparation of copolymers containing hydroxyl groups by radical reaction of (A) 10 to 30% by weight of at least one glycidyl ester containing 12 to 14 carbon atoms, of an aliphatic saturated monocarboxylic acid with a tertiary or quaternary alpha -carbon atom; and (B) 90 to 70% by weight of at least two unsaturated copolymerisable monomers, at least one of which contains at least one carboxyl group, wherein component (A) is introduced first to a reaction zone and is then reacted at a temperature of at least 140 DEG C. with component (B) and a radical initiator, the component (B) containing a monomer having carboxyl groups, wherein for the preparation of low-viscosity copolymers component (A) is reacted at 140 to 200 DEG C. by substance polymerisation until a degree of reaction of at least 95% is achieved, the component (B) containing at least 3.3% by weight of the monomer having carboxyl groups, and an article coated with a product of said process.

Process for preparing copolymers, and use of the products obtained

Process for preparing copolymers from esters of an unsaturated carboxylic acid with at least one other unsaturated monomer, characterized in that the following components are copolymerized in radical substance polymerization: (A) 5 to 60 parts by weight of at least one diester of an alpha , beta -olefinically unsaturated dicarboxylic acid having 1 to 8 carbon atoms in the ester group, (B) 10 to 70 parts by weight of at least one vinyl aromatic hydrocarbon having one vinyl group, (C) 0 to 30 parts by weight of at least one glycidyl ester of an aliphatic saturated monocarboxylic acid branched in the alpha -position, (D) 0 to 50 parts by weight of at least one ester, amide and/or anhydride of an alpha , beta -olefinically unsaturated mono- and/or dicarboxylic acid, (E) 0 to 40 parts by weight of at least one alpha , beta -olefinically unsaturated monocarboxylic acid, the sum of components (A) to (E) being 100 parts by weight, whilst at least a part of component (A) is at first introduced into the reaction vessel alone or in combination with at least a part of component (C) and a mixture of component (B) with at least one of components (D) and (E) and any remaining parts of components (A) and/or (C) is added in batches at 140 DEG to 200 DEG C. together with a radical initiator, alone or in conjunction with a regulator, and if component (C) is present, at least an equimolar quantity of component (E) is used; and the use of the products thus obtained as binders for the preparation of coating compositions.

METHOD FOR PRODUCING CURABLE COPOLYMERS

Powder coating agents

Curing agent and its use

A curing agent (A) containing active CH groups is characterised in that it contains at least two groups of the formula (I) <IMAGE> or structural units of the formula (I') or (I") <IMAGE> in which A is <IMAGE> X and Y are identical or different and are <IMAGE> CO2R<1>, CN, NO2, CONH2, CONR<1>H or CONR<1>R<1>, where the radicals R<1> may be identical or different and are hydrocarbon radicals, preferably alkyl radicals 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 be an NO2 group; A' is <IMAGE> X' and Y' are identical or different and are <IMAGE> Curable mixtures of (A) and a Michael acceptor (B) and optionally diluents and conventional additives cure rapidly even at low temperatures and are particularly suitable for surface-coating compositions.

Cathodically depositable aqueous electrodeposition composition and its use

Aqueous cathodic electrodeposition composition which contains…       (A) 90 to 50% by weight, based on the total amount of the synthetic resin binder, of one or more polycondensation, polymerisation and/or polyaddition resins, the resin or, where several resins are present, the mixture thereof…           a) having a number average molecular weight (Mn) of 700 to 10,000,…           b) 1.2 . 10<2><3> to 21.7 . 10<2><3> side or terminal double bonds per 1000 g, corresponding to a hydrogenation iodine number of 5 to 90,…           c) optionally containing primary and/or secondary hydroxyl groups, corresponding to a hydroxyl number of 0 to 450 mg of KOH/g of resin and…           d) having tertiary amino groups, corresponding to an amine number of 30 to 450 mg of KOH/g resin,…       (B) 10 to 50% by weight of one or more crosslinking agents which are compounds having methanetricarboxamide units of the formula …<IMAGE>… which contain in the molecule on average at least 2 groups having active H atoms and are derived from a reaction product of a mono- or polyisocyanate with a malonic acid derivative, and…       (C) 0 to 10% by weight of one or more blocked di- and/or polyisocyanates,… and the use thereof.

Cross-linking agents for paint binders and process for their preparation

Process for the preparation of self-curing cationic lacquer binders

A process wherein the crosslinking is effected by reacting the dialkyl methanecarboxylate monoamide structures of the resin with free hydroxyl or amino groups. <??>The compounds employed for introducing the crosslinking functions contain a free isocyanate group and at least one mono- and/or dialkyl methanecarboxylate monoamide group. Such compounds are obtained by reacting di- or polyisocyanate compounds with the appropriate amount of a CH-active alkyl ester, preferably dimethyl malonate or diethyl malonate. <??>The process products are used as binders for cathodic electrodeposition coatings.

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