Basf Aktiengesellschaft

Klaus Glaser

Chung-Ji Tschang

Alfred Oftring

Rolf Fikentscher

Guenther Gotsmann

Volker Schwendemann

Bernd Burkhart

Christos Vamvakaris

Ekhard Winkler

Werner Streit

Johannes P Dix

Gerold Braun

Albert Hettche

Stefan Weiss

Walter Ziegler

Wolfram Dietsche

Gerhard Welzel

Bernhard Dung

Karl Gans

Ulrich Schroeder

Richard Mueller

Emil Schaefer

Use of thiouronium salts as brighteners for aqueous acidic

Phosphonium salts and use thereof as brighteners for aqueous acidic

Production of nickelized shaped articles

Polymeric, unquaternized or quaternized condensates which contain piperazine rings bonded via chain members are used as conditioners for the pretreatment of nonmetallic surfaces of moldings before their activation for subsequent chemical metallization. This procedure gives particularly uniform and well adhering metal coatings.

Polymeric conditioner for pretreating nonmetallic surfaces for chemical

Copper is chemically deposited from alkaline aqueous baths containing polyacetal complexing agents obtainable by reacting

Chemical deposition of copper from alkaline aqueous baths

Certain quaternary salts of di- and/or tri-(alkanol)-amines, which salts are soluble in the aqueous bath employed, are used as conditioners for pretreating nonmetallic surfaces of moldings prior to their activation for subsequent chemical metallization. Outstandingly uniform and strongly adhering metal coatings are obtained in this manner.

Sulfatobetaines are prepared by reacting an addition compound of sulfur trioxide and a tertiary amine with an alkylene carbonate.

Preparation of sulfatobetaines

Sulfatobetaines are prepared by reacting an adduct of a base having a tertiary N atom and sulfur trioxide with an alkylene oxide in the presence of an alkylene carbonate as a solvent.

A liquid preservative for plated or unplated metal surfaces and surfaces of coatings, in the form of an aqueous wax dispersion which contains a special ethylene/acrylic acid copolymer wax, consisting of from 8 to 25% by weight of acrylic acid units and from 92 to 75% by weight of ethylene units, in partially or completely neutralized form, if appropriate as a mixture with waxes based on polyethylene oxidation products and/or hydrocarbon waxes, the use of this special ethylene/acrylic acid copolymer wax for preserving plated or unplated metal surfaces and surfaces of coatings, and a process for temporarily preserving metal surfaces and surfaces of coatings.

Aqueous wax dispersions as preservatives for metal surfaces and surfaces

Water-soluble, crosslinked nitrogen-containing condensation products, the viscosity of which, in aqueous solution, increases with increasing temperature, are obtained by reacting a block copolymer of the formula: ##STR1## x is from 50 to 250, y is from 20 to 100, the ratio of x to y is from 6.5:1 to 1:15, with compounds having at least four basic NH groups in a weight ratio of from 0.8:1 to 30:1. The products are added to aqueous systems, e.g. polymer solutions and polymer dispersions, to improve the viscosity characteristics.

Water-soluble, crosslinked nitrogen-containing condensation products

A zinc electroplating bath which contains polyalkylenepolyamines which possess alkyl and sulfoalkyl groups.

Zinc electroplating bath

An aqueous cyanide-free alkaline zinc bath for electroplating metallic surfaces with mirror-bright zinc coatings, which bath contains zinc ions, alkali metal hydroxides and, as the brightener, a polyalkylenepolyamine which is at least partially alkylated, with alkyl of 1 to 3 carbon atoms, at the basic nitrogens.

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Mannheim, Germany

Klaus Glaser