| 摘要 |
PURPOSE:To provide a monoazo dye mixture which is red and has excellent dispersion stability even when polyester fibers,m etc., are dyed under high- temperature and severe conditions, having a specified crystalline modification. CONSTITUTION:A mixture of diazo components of formulas I and II is diazotized. The resulting diazo mixture is coupled with a coupling component of formula III is an aq. medium at 0-15 deg.C for 30min to 10hr to obtain a mixture of monoazo compds. having a beta modification, composed of 70-30wt% monoazo compd. of formula IV and 30-70wt% monoazo compd. of formula V. The mixture is dispersed in an aq. medium in the pesence of optionally a dispersant such as a concentrate of sulfite pulp waste liquor mainly composed of a condensate of formaldehyde with naphthalenesulfonic acid and sodium lignosulfonate and the dispersion is stirred at 60-130 deg.C for 0.5-30hr to obtain a mixture of monoazo dyes of formulas IV and V, having a beta modification charcterized by an X-ray diffraction pattern (CuKalpha) with five intense peaks at an angle (2<theta>) of about 14.1 deg., 18.6 deg., 23.6 deg., 25.0 deg. and 25.8 deg..
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