Manufactured tin(II) sulfate granules for electrolytic coloring with metal salts

US5409685A · kind A · utility

Assignee

• Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

• Loert de Riese-Meyer · Goldkronach, DE
• Hans-Josef Beaujean · Dormagen, DE
• Jens Bode · Goldkronach, DE
• Joerg Sander · Ulm, DE
• Volker Sander · Hilden, DE

Key dates

• Filing date: Dec 20, 1993
• Grant date: Apr 25, 1995
• Expiry date: Dec 20, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C25D11/22
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A manufactured stannous sulfate granulate is suitable for electrolytically coloring anodized aluminum with metallic salts, where the granulate particles have a linear extension from 0.1 to 10 mm. Also disclosed are a process for manufacturing the same and using it for electrolytically coloring anodized aluminum with metallic salts. The manufactured stannous sulfate granulate is characterized by technical advantages, such as storage stability, easy dispensibility, and absence of dust, compared to conventionally used stannous sulfate powders.