Akzo N.v.

Hilde Kersten

Gerhard Meyer

Helmut Magerlein

Anton Toth

Hans G Zengel

Hans-Georg Zengel

Gilles Dohy

Jean P Vollmer

A process is provided for production of vicinal alkylene glycols by hydrolysis of an epoxyalkane having from 6 to 24 carbon atoms in the presence of water and a basic catalyst and under carbon dioxide pressures of from 100 to 300 bars and temperatures of from about 200.degree. C. to 350.degree. C. Also disclosed are homogeneous mixtures of epoxyalkanes and/or vicinal alkylene glycols having from 6 to 24 carbon atoms, water, a basic catalyst and carbon dioxide in an amount corresponding to a carbon dioxide partial pressure of from about 100 to 300 bars, provided at temperatures from about 200.degree. C. to 350.degree. C. The process provides high yields, selectivities and reaction velocities and the resulting products are of high purity.

Production of vicinal alkylene glycols

Self-curing cationic amide-group-containing aminourea resins are disclosed, if necessary with urethane groupings, which are the reaction product of at least

Self curing cationic amide-group-containing aminourea resin, if

Method for the crosslinking of cathodically depositable coating agents, optionally containing pigment, dyestuff, filler, solvent, varnish adjuvant or additional crosslinking components, based upon a water-soluble or -dispersible nitrogen based cationic resin, at least partially present as salt, in which a cationic resin of molecular weight greater than 1000, containing 2 to 20 equivalents of double bonds per 1000 g, is contacted with sulfur and/or one or more sulfur-containing vulcanization acceleration. The coating mixture is then electrophoretically deposited upon an object, and hardened at temperatures above 120.degree. C. The resin may contain tertiary atoms of carbon, and also one or more sulfur-free vulcanization accelerators may be used. The resin is a reaction product of at least (A) one epoxidized polydiene and/or (B) one bisglicydylether of a polyphenol and (C) one amide compound formed from one or more higher, essentially unsaturated fatty acids and a polyamine, and can contain a ketimino or hydroxyl group, and/or (D) one hydrazide compound, which contains tertiary amino groups, and if necessary (E) one organic secondary amine, and has been made with an acid under formation of cationic groups dispersible in water. The invention also encompasses hardened coatings obtained according to this method.

Method for the crosslinking of cathodically depositable coating agents

Waterdispersible cationic resins are formed by reacting the components comprising at least

Waterdispersible cationic resins for electrodeposition

A catephoretically depositable aqueous coating composition is disclosed which is based on

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Erlenbach, Germany

Hilde Kersten