Study on the Dyeing Properties of Hemicyanine Dyes in Acrylic Fabrics

In this paper, two hemicyanine dyes, DEASPI and DHEASPI-C1, were synthesized and used in acrylic fabrics as fluorescent dyes. The influence of the hydroxyl groups of dye molecules on the dyeing properties was analyzed, and the results showed that the exhaustion value and partition coefficient value decreased a lot when there were two hydroxyl groups attached to the end of dye molecule. The reflectance of the dyed acrylic fabrics with these two fluorescent dyes is higher than 100% in 600 - 700 nm. Moreover, the chromaticity of dyed acrylic fabric was calculated according to the EN-471 standard (2003).