Patent · US Expired

Method for the preparation of a soldering flux

US5968288A · kind A · utility

4Cited by

3References

12Claims

0Family size

Assignee

SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

Heinrich Willenberg · Garbsen, DE
Wilfried Becher · Neckarsulm, DE
Karl Hellberg · Hannover, DE

Key dates

Filing date	Jun 4, 1996
Grant date	Oct 19, 1999
Priority date	—
Expiry date	Jun 4, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01F7/54
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method for the preparation of potassium salts of complex aluminum fluorides which can be used in particular as a flux in particular for soldering lightweight metallic materials. In the method a potassium compound is added to aqueous fluoroaluminic acid, and potassium cryolite or a substance mixture which contains potassium cryolite is added to the resulting suspension. The resulting product is then dried and can be used as a flux for soldering lightweight metallic materials, especially aluminum.

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