Gas-phase passivation of metal pigments

US5352286A · kind A · utility

Assignee

• BASF SE

Inventors

• Raimund Schmid · Neustadt, DE
• Norbert Mronga · Dossenheim, DE
• Juan Antonio Gonzalez Gomez · Ludwigshafen, DE

Key dates

• Filing date: Oct 14, 1993
• Grant date: Oct 4, 1994
• Expiry date: Oct 14, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/80
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A simple process for achieving very active passivation of metal pigments against hydroxyl-containing compounds comprises treating the metal pigments with passivators in the gas phase.