Fluorescent pigments

US5470502A · kind A · utility

Assignee

• BASF SE

Inventors

• Erwin Hahn · Heidelberg, DE
• Werner Ostertag · Havelsee, DE
• Guenther Seybold · Schifferstadt, DE

Key dates

• Filing date: Feb 8, 1994
• Grant date: Nov 28, 1995
• Expiry date: Feb 8, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0061
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Fluorescent pigments have a mean particle size of from 8 to 16 lm and contain apolar polymer matrices based on polymethyl methacrylate, polystyrene, polybutadiene-modified polystyrene, polycarbonate, polyvinyl chloride or polyamide and one or more apolar fluorescent dyes of the coumarin or perylene series.