Dyestuffs for bulk dyeing plastics

US5621027A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Roschger · Ludwigshafen, DE
• Volker Hederich
• Stephan Michaelis · Leverkusen, DE
• Friedrich W. Krock · Odenthal, DE

Key dates

• Filing date: May 12, 1995
• Grant date: Apr 15, 1997
• Expiry date: May 12, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B57/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Dyestuffs of the formula ##STR1## wherein Z denotes a radical to complete a 3,4- or 2,3-pyridinylene, a 4,5-pyrimidinylene, a 3,4- or 4,5-pyridazinylene or a 2,3-pyrazinylene system and PA0 X, Y, m and n have the meanings given in the description, which are particularly suitable for bulk dyeing plastics, in particular thermoplastics, have been found.