PURPOSE: To improve the color rendering without losing the vividness of the blue color of a cyanoazo dye by incorporating a specified anthraquinone dye into a specified cyanoazo dye.
CONSTITUTION: A dye composition which contains a compound of formula I and a compound of formula II. In formula II, Y1 is 0 or imino; and R1 is branched alkoxyalkyl, lower alkoxyalkoxyalkyl, or lower alkyl. When a monoazo dye of formula I is used for dyeing hydrophobic fibers, such as polyester fibers, a blue color with vividness comparable to that obtainable with an anthraquinone blue dye often used as a moderate blue bye can be obtained, also with sublimation fastness superior to that of the blue dye. However, the monoazo dye has such a shortcoming that it is inferior to the blue dye in color rendering. The incorporation of a dye of formula II into a dye of formula I can greatly improve the color rendering while keeping the color tone of a dyed material, so that a dyed material having color rendering comparable to that obtainable with the blue dye can be produced.
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MIKAWA AKIYOSHI
TSUNODA MITSUAKI
