Pigment salts and their use for dyeing and pigmenting

US5525152A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Roschger · Ludwigshafen, DE
• Stephan Michaelis · Leverkusen, DE
• Gunther Franke · Mount Pleasant, US
• Bernd Woost · Rösrath, DE
• Bernd Kaletta · Langenfeld, DE

Key dates

• Filing date: May 1, 1995
• Grant date: Jun 11, 1996
• Expiry date: May 1, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B69/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for coloring polymeric materials by dyeing or pigmenting said polymeric materials with a pigment salt having the formula (I): ##STR1## and tautomeric forms thereof, wherein M.sup.n+ is an n-valent cation.