| 摘要 |
<p>beta-Modifn. of the monoazo dispersion dye of formula: having a given X-ray diffraction diagram, uses CuKalpha radiation which possesses 1 line of strong intensity at 8.3 degrees, lines of medium intensity at 22.2 degrees, 22.9 degrees, 23.4 degrees, 24.6 degrees, 25.2 degrees, 26.2 degrees, and 13.8 degrees, and lines of low intensity at 9.4 degrees, 10.9 degrees, 11.3 degrees 12.6 degrees, 16.4 degrees, 16.7 degrees, 17.6 degrees, 19.0 degrees and 27.6 degrees. The known alpha-modifn. is heated in water at 100-150 degrees C, opt. in presence of a dispersing agent or water-soluble solvent, e.g. 20 parts alpha-modifcn. 2 parts dispersing agent and 78 parts water are stirred in an autoclave for 12 h. at 125 degrees C and pH 7. The dyes are used for dyeing of synthetic polyester textiles, esp. in wound yarn form. The beta-modifcn. is stable at high dyeing temps. of 80-200 degrees C of which the known form is unstable and deposits on the yarn.</p> |
