Galvanic dispersion deposition bath

US4479855A · kind A · utility

Assignee

• MTU Motoren-und Turbinen-Union München GmbH · DE

Inventors

• Martin Thoma · Munich, DE
• Paul Buenger · Eau Claire, US

Key dates

• Filing date: Mar 23, 1984
• Grant date: Oct 30, 1984
• Expiry date: Mar 23, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D15/02
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A bath or electrolyte for the galvanic deposition of a metal matrix layer having embedded therein particles of a non-metallic substance, comprises a stabilizer for keeping such non-metallic substances uniformly suspended in the bath for the duration of the electrolysis. The suspension stabilizer is a cation active imidazole derivative satisfying the general formula ##STR1## wherein R.sup.1 is preferably a monovalent, saturated or unsaturated hydrocarbon radical having at least four aliphatically bound C-atoms, R.sup.2 is a methylene (carbene), or ethylene, or propylene or isopropylene group, and wherein X is selected from --NH.sub.2, --NHR.sup.3, --NR.sup.3 R.sup.4, --OH, or OR.sup.5, whereby R.sup.3, R.sup.4 and R.sup.5 are methyl, ethyl, or propyl or polyglycolether radicals having up to five --O--CH.sub.2 --CH.sub.2 groups.