Isoindoline colorants

US4480097A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolfgang Lotsch · Beindersheim, DE
• Reinhard Kemper · Heidelberg, DE

Key dates

• Filing date: Jan 26, 1981
• Grant date: Oct 30, 1984
• Expiry date: Jan 26, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B57/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Isoindoline colorants of the formula ##STR1## where the two R's independently of one another are C.sub.1 -C.sub.4 -alkyl, or are benzyl, phenyl or 1-naphthyl, each of which may be unsubstituted or substituted by groups which do not confer solubility. The colorants give deep, yellow to orange, hues in plastics, surface coatings and printing inks. The colorations have very good lightfastness and fastness to weathering and to migration.