Bulk dyeing using quinophthalone dyestuffs

US5800573A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Stephan Michaelis · Leverkusen, DE
• Peter Roschger · Ludwigshafen, DE
• Volker Hederich

Key dates

• Filing date: Apr 9, 1997
• Grant date: Sep 1, 1998
• Expiry date: Apr 9, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B25/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Dyestuffs of the formula (I) ##STR1## wherein Z represents SO.sub.2 or CO, PA1 A represents optionally substituted alkyl or aryl and PA1 p denotes 1 or 2, which are particularly suitable for the bulk dyeing of plastics, in particular thermoplastics, have been found.