公开(公告)号：DE2535447A1

公开(公告)日：1977-02-17

申请号：DE2535447

申请日：1975-08-08

Applicant: BASF AG

Inventor： PREUGSCHAS HELMUT DIPL CHEM DR ,  DAUBACH EWALD DIPL CHEM DR ,  SAUKEL HEINZ DIPL CHEM DR ,  HERRMANN MANFRED DIPL CHEM DR ,  RAMBACH LEONHARD VON ING GRAD

IPC: C09B67/00 ,  C09B67/46

Abstract: Highly conc. powdery dispersion- and vat dye compsns. contain, by wt., (a) 50-80 (60-70)% of >=1 finely dispersed dispersion- or vat dyes, and (b) 20-50 (30-40)% condensn. prod. as dispersant. Dispersant is prepd. by re-condensn. of (i) a condensate (I), which is prepd. by condensing phenolsulphonic acids, free from condensed ring systems, with urea and HCHO or HCHO-yielding matls., in mol. ratio 1:1-1.5:1.7-2.2, with (ii) a condensate (II) prepd. from phenol and HCHO, in mol. ratio 1:1, in a strongly alkaline medium. Re-condensn. takes place in a strongly acid medium. Before re-condensn. with (I), (II) is left to react 1-2 hrs. at pH 2-4. Compsns. dye textiles in pure colour shades, including bright yellow to orange. Condensate does not colour or soil textile fibres. Bright effects are obtd. when using optical brighteners. Even sensitive dyes can be dispersed at higher temps., e.g. 60-90 degrees C, to form stable dispersions. Dispersions can take place at pH 4-7 without increasing viscosity. Dispersion velocity achieved is higher than with standard dispersants. In an example, dispersant prepn. (I) was pred. from 94 pts. sulphonated phenol, 60 pts. urea and 190 pts. 30% HCHO. (II) was prepd. from 47 pts. phenol and 50 pts. 30% HCHO.