High-hiding calcium color lakes having great full-shade brillance and improved lightfastness

US4248635A · kind A · utility

Assignee

• BASF SE

Inventors

• Georg Henning · Ludwigshafen, DE
• Paul Guenthert · Schifferstadt, DE

Key dates

• Filing date: Aug 9, 1979
• Grant date: Feb 3, 1981
• Expiry date: Aug 9, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S534/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

High-hiding calcium color lakes, possessing great full-shade brilliance and improved lightfastness, of the general formula ##STR1## where D is a radical of the formula ##STR2## in which (1) a predominant proportion of primary particles has one or more dimensions greater than 0.3 .mu.m, PA0 (2) the length/width ratio of the predominant proportion of primary particles is not less than 2:1 and for which PA0 (3) the lightfastness of polyethylene containing 0.05% of colorant, and of plasticized PVC containing a 1:10 reduction of colorant, is rated at least 5 on a blue scale with ratings of from 1 to 8. The lakes are particularly suitable for coloring plastics.