Patent · US Expired

Production of shining shaped articles coated with zinc or a zinc alloy

US5421990A · kind A · utility

2Cited by

3References

5Claims

0Family size

Assignee

BASF SE

Inventors

Erwin Hahn · Heidelberg, DE
Bernhard Dung · Havelsee, DE
Bernd Burkhart · Mutterstadt, DE
Chung-Ji Tschang · Bad Dürkheim, DE

Key dates

Filing date	Nov 9, 1993
Grant date	Jun 6, 1995
Priority date	—
Expiry date	Nov 9, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25D3/22
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The production of shining shaped articles coated with zinc or a zinc alloy by electrodeposition of zinc or a zinc alloy from acidic aqueous electrolytic baths which contain as essential components one or more zinc salts and, where appropriate, salts of the other alloy metals, one or more conducting salts, one or more surfactants and one or more brighteners, entails employing as brighteners compounds of the formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.8 -alkoxy, phenoxy, benzyloxy, amino, C.sub.1 -C.sub.6 -alkylamino or di(C.sub.1 -C.sub.6)alkylamino, PA1 R.sup.2 is C.sub.1 -C.sub.4 -alkyl, phenyl, benzyl or the meanings of R.sup.1, and PA1 Ar is phenyl or naphthyl which can additionally be substituted by one to three C.sub.1 -C.sub.4 -alkyl groups or C.sub.1 -C.sub.4 -alkoxy groups.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.