Metal complex pigments

US6350307B1 · kind B1 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Frank Linke · Recklinghausen, DE
• Kent Faubion · Leverkusen, DE
• Udo Herrmann · Dormagen, DE
• Richard Sommer

Key dates

• Filing date: Oct 8, 1999
• Grant date: Feb 26, 2002
• Expiry date: Oct 8, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0029
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Metal complexes of an azo compound which conforms to the formula (I) or one of its tautomeric structures whereinR and R′ are independently OH, NH2, NH—CN, acylamino or arylamino,R1 and R1′ are independently —OH or —NH2,and which contain at least one guest compound,characterized in that the metal complexes correspond to the mono-, di-, tri- and tetrainions of the azo compounds of the formula (I) with the metals selected from the group consisting of Ca, Zn, Cu, Fe, Co, Sr, Ba, Cr, Sn, Al, Mg, Cd, Pb and La.