Process for dyeing polyurethane resins

US3993619A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Winfried Kruckenberg · Leverkusen, DE
• Konrad Nonn
• Georg Pape · Leverkusen, DE
• Michael Kressner · Leichlingen, DE

Key dates

• Filing date: May 22, 1975
• Grant date: Nov 23, 1976
• Expiry date: May 22, 1995

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2262/0276
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Dyestuffs of the formula ##SPC1## Wherein: PA1 R.sub.1 denotes cyano, halogen, alkoxy, alkylsulphonyl, arylsulphonyl, optionally mono or disubstituted carbamoyl or optionally mono- or disubstituted sulphamoyl, PA1 R.sub.2 denotes hydrogen, cyano carboxyl, halogen, alkoxy, alkyl, alkylsulphonyl or arylsulphonyl, PA1 R.sub.3 denotes hydrogen cyano, halogen or alkyl, PA1 K denotes the residue of a coupling component of the arylamine series, PA1 X denotes O, NH or N--C.sub.1 -C.sub.4 -alkyl and PA1 n denotes an integer of from 1 to 4, The XH groups being attached to one or more substituents R.sub.1, R.sub.2, R.sub.3, or to a substituent of the coupling component are added to the reaction mixture or to one of the components are suitable for the dyeing of polyurethane resins by incorporating into the resins by the formation of covalent bonds.