Bayer Aktiengesellschaft

Agfa-gevaert Ag

Artur Botta

Hans-Josef Buysch

Lothar Puppe

Christian Rasp

Heinz-Joachim Rother

Gert Jabs

Christian Wegner

Heinrich Krimm

Anita Von Konig

Dieter Arlt

Horst Berneth

Thomas Scholl

Otto Immel

Hanns-Peter Muller

Martin Scheer

Heinrich Heine

Helmut Steinberger

Friedrich Berschauer

Gerd Fengler

Hermann Gruber

Wolfgang Wellner

Joachim Franke

Franz Moll

Gunter Klug

Rolf Naumann

Werner Berthold

Lutz Leitner

Gunther Teichmann

Hans-Peter Biermann

Christian Frolich

Johannes Hartl

Phenols monomethylated or dimethylated in the ortho or para position to the OH group and having the formula ##STR1## can be prepared by reaction of tert-alkyl-substituted phenols of the formula ##STR2## in which at least one free ortho or para position to the OH group is present, in three reaction steps a), b) and c). In a), (II) is reacted with formaldehyde or its polymers and a carboxylic acid of the formula

Process for preparing monomethylated or dimethylated phenols

Substituted lactams of the formula ##STR1## can be prepared from lactam N-carboxylates or lactim O-carboxylates of the formulae ##STR2## by thermal or mixed thermal and catalysed CO.sub.2 elimination at 80.degree.-450.degree. C. Lactams substituted on the N atom by aliphatic groups such as those produced herein are useful as industrial aprotic solvents.

Process for the preparation of N-substituted lactams

The present invention relates to a reaction resin composition comprising a mixture of polyisocyanates, epoxides, and amine catalysts of the formula ##STR1## wherein A is independently alkylene, alkenylene, alkynylene, alkylidene, cycloalkylene, or aralkenylene; m is an integer of from 0 to 30; R.sup.1, R.sup.2 and R.sup.3 are independently optionally substituted aralkyl or polyaralkyl; and R.sup.4 is alkyl, alkenyl, alkynyl, cycloalkyl, or optionally substituted aralkyl or polyaryalkyl.

Cold setting reaction resin mixture and use thereof

It has been found out that polyaralkylamines of the formula stated in the claims are useful as corrosion inhibitors for metallic materials; furthermore were found out new polyaralkylamines of the formula stated in the claims and a process for their preparation.

Use of polyaralkylamines as corrosion inhibitors

Oligophenyls dihalogenated in the 4,4'-position, of the formula ##STR1## can be prepared by catalyzed halogenation of oligophenyls of the formula ##STR2## wherein, in the formulae, X.sup.1 and X.sup.2 independently of one another represent chlorine or bromine, preferably chlorine,

Process for the preparation of oligophenyls dihalogenated in the

p-Chlorotoluene can be prepared in an improved manner by catalyzed reaction of toluene with a chlorinating agent if a zeolite L containing metal cations is employed as the catalyst and the reaction is carried out in the presence of methylene chloride and/or chloroform.

Process for the preparation of p-chlorotoluene

Pressure-sensitive reactive recording material containing

Recording material

Phenylketones etherified in the 4-position can be prepared by reaction of aromatic ethers which have a free 4-position with acylating agents, the acylation being carried out in the presence of zeolite catalysts having pore sizes of at least 5 .ANG..

Process for the preparation of phenylketones etherified in the 4-position

4,4'-dihalobiphenyls can be prepared by catalyzed halogenation of biphenyls with halogenating agents, the catalysts used being zeolites having pore sizes of at least 5 .ANG..

Process for the preparation of 4,4'-dihalobiphenyls

New polyaralkylated hydroxybenzamides were found and a process for their preparation; the polyaralkylated hydroxybenzamides are used as corrosion inhibitors.

Polyaralkylated hydroxybenzamides, process for their preparation and

Condensation products of benzyl chlorides and aromatic hydroxycarboxylic acids are suitable for use as color developers in pressure- or heat-sensitive recording materials.

Oligobenzylated hydroxycarboxylic acid derivative

The invention relates to sulphinyl- and sulphonyl-azacycloheptan-2-ones defined infra in Formula (I), processes for their preparation and their use as agents for promoting growth, and improving the fat to lean ratio utilization in animals.

Sulphinyl- and sulphonyl-azacycloheptan-2-ones, and their use as feed

A process for producing an anionic copolymer containing urethane and carboxylic acid ester moieties with or without carbonate moieties, carbonamide moieties, or both carbonate and carbonamide moieties, having weight average molecular weights from 1,000 to 150,000, determined by light diffusion method, which comprises heating an anhydrous mixture of 20 to 80% by weight of lactam and 80 to 20% by weight of a cyclic carbonate at temperatures between 100.degree. and 250.degree. C. in the presence of 0.001 to 1% by weight, based on the quantity of monomers, of an alkaline catalyst and copolymers produced thereby which are useful as adhesives, plasticizers and lacquers.

Copolymers of cyclic carbonic acid esters and lactams and their

Anionic copolymers of lactams and aliphatic polycarbonates having urethane and carboxylic acid ester groups, preferably having recurring structural units of the formula:

Copolymers based on aliphatic polycarbonates and lactams

The present invention relates to a process for the production of polyureas by reacting organic polyisocyanates containing blocked isocyanate groups with organic compounds containing at least two primary and/or secondary amino groups in the presence of catalysts which accelerate the condensation reaction of the above-mentioned starting materials, characterized in that compounds containing at least one guanidine group corresponding to the following formula: ##STR1## are used as catalysts.

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Krefeld, Germany

Artur Botta