Process for the dyeing of water-insoluble thermoplastic polymers and polycondensates in the mass

US4093585A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Wolfgang Teige · Kelkheim, DE
• Rudolf Schickfluss

Key dates

• Filing date: Feb 28, 1977
• Grant date: Jun 6, 1978
• Expiry date: Feb 28, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B57/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Process for the dyeing of a water-insoluble thermoplastic polymer or polycondensate in mass, which comprises adding to the said thermoplastic material before the final molding thereof an azlactone dyestuff of the formula (1) ##STR1## in which A and B each represents naphthyl, phenyl, chlorophenyl, bromophenyl, lower alkyl-phenyl, lower alkoxyphenyl, nitrophenyl, ##STR2## CYANOPHENYL, DICHLOROPHENYL, CHLORO-LOWER ALKYL-PHENYL, NITRO-LOWER ALKYL-PHENYL, CHLORO-NITROPHENYL, A and B being identical or different, D represents naphthylene, phenylene, monochlorophenylene, dichlorophenylene or di-lower alkoxyphenylene, or with a mixture of dyestuffs of the said formula (1), the dyeings so obtained representing brilliant yellow dyeings of high tinctorial strength being distinguished by very good fastness to light, rubbing and ironing and, particularly, an outstanding stability toward heat.