Crosslinking Dyes

Abstract

Abstract This article presents a detailed review of the development of crosslinking dyes and their crosslinking dyeing behaviors. Crosslinking dyes were developed in the 1960s to solve the problem of low utilization of reactive dyes due to hydrolysis of the reactive groups. Basazol dyes were the first dyes to exhibit linkage to the fibers through crosslinkers. Later, a series of crosslinking dyes was developed. Based on the number of crosslinking groups, crosslinking dyes can be divided into those that contain 1–2 crosslinking groups, which includes Basazol crosslinking dyes, Indosol crosslinking dyes, aminoalkyl crosslinking dyes, and the early produced crosslinking dyes of China and those that contain multiple crosslinking groups, which include polyethylene polyamine crosslinking dyes, polyallylamine crosslinking dyes, and polyvinylamine crosslinking dyes. The structure and dyeing characteristics of these crosslinking dyes are discussed. Here the crosslinkers used for crosslinking dyes with 1–2 crosslinking groups and their crosslinking dyeing behaviors are introduced. It is shown that the crosslinking dyes that contain multiple crosslinking groups crosslink with each other and simultaneously crosslink with fibers through crosslinkers to form covalent bonds.