Method for the preparation of additives in organo-aluminum electrolyte media

US4071526A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Richard Dotzer · Nuremberg, DE
• Hans-Georg Hauschildt
• Enno Todt, deceased
• by Susanne Todt, heir
• by Ruth Katharina Todt, heir
• Ernst-Josef Todt

Key dates

• Filing date: Nov 12, 1975
• Grant date: Jan 31, 1978
• Expiry date: Nov 12, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07F5/066
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention concerns a method for the preparation of additives for influencing the electrocrystalline growth in aprotic oxygen- and water-free organo-aluminum electrolyte media. A compound which contains a sulfonimide or sulfonamide group as the reactable group, preferably, N-benzoylbenzenesulfonimide, optionally in the presence of an inert organic solvent, is reacted with at least one organoaluminum compound of the general formula AlR.sub.3, where R is an alkyl radical, in the ratio of 1:1 to 1:6. The additives obtained furnish a bright aluminum coating on metals and conductive materials in direct electrodeposition.