A novel carboxy-dye reactive system of potential applicability to Wool and Nylo...

• Author(s): Gomes, Jaime Rocha ; Moura, João C. V. P. ; Campos, Ana M. F. Oliveira ; Maia, Hernâni L. S.
• Date: 1991
• Persistent ID: http://hdl.handle.net/1822/6164
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Dyes; PA; Wool; Carboxy; Dyeing; Chloroformate
• Document Type: Article
• Language: English

Description

Dyes containing carboxylic acid groups have the potential to be reacted with the amino groups of wool and nylon fibres by prior activation with ethyl chloroformate (forming a mixed anhydride). The scope of this reaction has been examined in solution using a range of carboxy dyes with cyclohexyl-amine or lysine as model amine substrates. The expected amides are formed in good yields, and have been isolated and characterised. A preliminary study of the reactive dyeing of wool andnylon-6.6 indicates that dyeings with high wet fastness can he achieved with this system.