Bayer Aktiengesellschaft

Willi Dunwald

Rudolf Merten

Wilfried Zecher

Jurgen Lewalter

Bernhard Schulte

Reinhard Halpaap

Ludwig Rottmaier

Hans Schlegel

Josef Pedain

Wolfgang Jakob

Karl-Heinrich Meyer

Klaus Reinking

Holger Casselmann

Werner Clarenz

Hans-Jurgen Muller

Wolf-Dieter Last

Karl-Heinrichrich Meyer

The present invention relates to coating compositions which are suitable for the production of heat resistant films and coatings and contain

Coating compositions and coated heat-resistant substrates prepared

The present invention relates to a process for the production of organic compounds containing (i) carbodiimide and/or uretone imine groups and (ii) blocked isocyanate groups, wherein about 10 to 90% of the isocyanate groups of an organic polyisocyanate are blocked by reaction with a monofunctional blocking agent for isocyanate groups, and subsequently about 65 to 100% of the free isocyanate groups still remaining are converted into carbodiimide groups with elimination of the carbodiimide. The present invention also relates to the organic compounds obtainable by this process and to their use for the production of plastics by reaction with compounds containing isocyanate-reactive groups by the isocyanate polyaddition process.

Process for the production of blocked polyisocyanates containing

The present invention is directed to lacquer binders containing polyvinyl acetal which are suitable for the formation of films and coatings and contain mixtures of

Lacquer binders, a process for coating heat resistant substrates and the

Lacquer binders suitable for the production of highly heat-resistant films and coatings consisting of a mixture of

Lacquer binders, coating compositions and wire enamels based on

The invention relates to a process for the production of coatings based on polymers having a hydantoin structure by reacting blocked polyisocyanate carrying carbodiimide and/or uretone imine groups with .alpha.,.beta.-unsaturated diicarboxylic acids or derivatives thereof at 50.degree. to 700.degree. C. said reaction being carried out on the substrate to be coated.

Process for the preparation of coatings with hydantoin structures by the

This invention relates to new wire lacquers based on hydantoin group-containing polymers.

Lacquer solutions based on hydantoin group-containing polymers

This invention relates to certain new aliphatic-aromatic polyamidoimides suitable for use as non-clouding electroinsulating lacquers and duroplasts.

Polyamidoimides prepared from trimelitic acid anhydride, isocyanates and

This invention relates to a process for the preparation of compounds containing at least one hydantoin ring in the molecule from carbodiimides having acylurea end groups and .alpha.,.beta.-unsaturated carboxylic acid derivatives and to their further reaction with carboxylic acids containing at least one other reactive group.

Process for preparation of hydantoin esters through a masked

The condensation of organic polyisocyanates, lactams, and cyclic polycarboxylic acid anhydrides in the presence of mono- or disubstituted imidazole catalyst results in a polyamide imide having an increased softening temperature.

Process for the production of polyamide imides

This invention relates to a process for the production of compounds containing at least one (thio)-hydantoin ring in the molecule by reacting a carbodiimide with hydroxy- or mercapto-succinic acid diesters corresponding to the following general formula: ##STR1## wherein R.sup.4 and X are as defined in the description.

Process for the production of (thio) hydantoins

The invention relates to a process for the production of compounds containing at least one hydantoin ring by reacting a carbodiimide with derivatives of succinic acid anhydride corresponding to the following general formula: ##STR1## wherein R.sup.4 represents a halogen atom, an alkyl-carboxy or aryl-carboxy group; or with maleic acid anhydride in the presence of aromatic OH-functional compounds at temperatures of from about 20.degree. to about 250.degree. C., optionally in a solvent and optionally in the presence of a catalyst, and also to the use of the polyhydantoins obtained, where they have high molecular weights, as high temperature-resistant coating compositions, films, powders, adhesives, lacquers or mouldings.

Process for the production of hydantoins

The invention relates to a new process for the production of compounds containing at least one hydantoin ring by reacting a carbodiimide with a derivative of an .alpha.,.beta.-unsaturated carboxylic acid corresponding to the following general formula: ##STR1## wherein R.sup.3, R.sup.4 and R.sup.5 are as defined in the description.

This invention relates to a new process for the production of coatings by coating heat-resistant substrates with a coating compound in which the binder is a two-component system containing polyisocyanates having at least partially blocked isocyanate groups and compounds containing isocyanate reactive groups and optionally further auxiliary agents and additives, the two-component system being one in which from about 0.1 to 60 equivalent % of the component containing isocyanate reactive groups consists of N,N',N'-tris-(2-hydroxyethyl)-isocyanurate, and to the coated substrate produced therefrom.

Process for the production of coatings and the use of

A process for the production of modified polyhydantions by reacting polyglycine acid derivatives with optionally masked polyisocyanates with the addition of cyclic anhydride compounds containing at least one further functional group capable of condensation in lactones as solvents.

Process for the preparation of polymers containing hydantoin groups

Heat resistant polymers connected by ester and/or urethane groups and optionally amide- and/or imide groups and/or hydantoin and/or isocyanurate rings are obtained by crosslinking the polymers with trishydroxy alkyl triazolidine -3,5-diones.

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Leverkusen, Germany

Willi Dunwald