The present work aims to investigate and develop a series of coumarin fluorescence dyes containing benzothiazole group.These dyes were obtained by the condensing 2-benzimidazolyl acetic acid with salicylaldehyde, 4-N,N-diethylaminosalicylaldehyde or condensing ethyl 2-benzimidazolyl acetic acid with 2,4-dihydroxybenzaldehyde in the present of piperidine. The red dye was obtained by the condensing 3-(2'-benzimidazole)-7-N,N-diethylaminocoumairn with malononitrile dyes were dyed on polyester, polyamides and their dyeing and fastness properties were evaluated. The fastness properties of all dyeing samples were in accord with commercial requirement.
