Basf Aktiengesellschaft

Paul Boerzel

Klaus Bronstert

Udo Reiter

Hans-Uwe Schenck

Norbert Greif

Rudi Widder

Hans-Josef Oslowski

Peter Freyberg

Richard Hoene

Friedrich Hovemann

Eduard Hartmann

Heinz-Hilmar Bankowsky

Polyamidoimide coatings having a long shelf life are prepared by a process in which a tricarboxylic anhydride, some of which may have been replaced by tetracarboxylic dianhydrides or dicarboxylic acids, is reacted with a polyisocyanate possessing 2 or more isocyanate groups in an organic solvent which is inert to isocyanate groups, from 0.7 to 0.98 isocyanate group being employed per anhydride and carboxyl group, and completely blocked polyisocyanate being added to the reaction mixture before, during or after the reaction in an amount such that the ratio of the total amount of anhydride and carboxyl groups employed to the total amount of isocyanate groups used, including those present in blocked form, is from 1:1 to 1:1.1. The polyamidoimide coatings are useful for coating electric conductors.

Preparation of polyamidoimide coatings having a long shelf life

A process for dyeing textile materials, containing natural and/or synthetic fibers, in an aqueous liquor by means of dyes which are sparingly soluble or insoluble in water, in the presence of dyeing assistants, wherein the dispersant used is a water-soluble sulfonic acid which is derived from a random copolymer of olefins of 3 to 6 carbon atoms and styrene and/or substituted styrenes and/or their alkali metal salts or ammonium salts.

Dispersant for textile dyeing and optical brightening

Isobutene polymers having a mean degree of polymerization P of from 10 to 100 and a proportion E of double bonds, capable of reaction with maleic anhydride, of from 60 to 90%, where E=100% corresponds to the calculated theoretical value for the case where each molecule of the isobutene polymer contains such a reactive double bond.

Polyisobutenes

Copolymers, having a uniform structure, of cyclic dienes are obtained by heating a mixture of from 35 to 96% by weight of cyclopentadiene, dicyclopentadiene and/or methyldicyclopentadiene, which may or may not be partially replaced by methylcyclopentadiene or tricyclopentadiene or methyltricyclopentadiene, from 1 to 30% by weight of maleic anhydride, maleic acid or a monoalkyl maleate, which maleic acid or maleic acid derivatives may be partially replaced by other .alpha.,.beta.-olefinically unsaturated monocarboxylic acids or dicarboxylic acids of 3 to 5 carbon atoms, and from 3 to 45% by weight of one or more vinyl-aromatics to 230.degree.-320.degree. C, during which heating the mixture does not remain at from 30.degree. to 230.degree. C for more than 5 hours, and preferably for not more than 2 hours. The copolymers may be used as binders for printing inks and coatings, and as additives in adhesives.

Copolymers, having a uniform structure, of cyclic dienes and their use

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Frankenthal, Germany

Paul Boerzel