Process for dyeing polyurethane resins

US4038240A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Herbert Hugl
• Gerhard Wolfrum · Waldershof, DE

Key dates

• Filing date: May 22, 1975
• Grant date: Jul 26, 1977
• Expiry date: May 22, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/0041
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Dyestuffs of the formula EQU F--B--A wherein: PA1 F denotes the residue of a dye molecule which is free from reactive groups and from water solubilizing groups, PA1 B denotes a direct bond or a bridge member, and PA1 A denotes the group: ##STR1## wherein: M represents N, CH or C--Hal, PA1 Hal represents halogen, PA1 Z.sub.1 represents OZ.sub.2 or ##STR2## X.sub.1 represents an optionally substituted .omega.-hydroxyalkyl group or .omega.-hydroxyalkenyl group, PA1 X.sub.2, y.sub.1 and Y.sub.2 represent hydrogen or optionally substituted alkyl, alkenyl, aralkyl or aryl groups, or X.sub.1 and Y.sub.1 together with the nitrogen atom form a heterocyclic group, and PA1 Z.sub.2 represents an optionally substituted alkyl group with the proviso that at least one of the groups X.sub.2, Y.sub.1, Y.sub.2 and Z.sub.2 is an .omega.-hydroxyalkyl or alkenyl group, the groups X.sub.1 and Y.sub.1 may also combine with the nitrogen atom to form a heterocyclic ring, Are suitable for the dyeing of polyurethane resins. The dyestuffs are incorporated in the resins with the formation of covalent bonds.