公开(公告)号：DE2401818A1

公开(公告)日：1975-07-24

申请号：DE2401818

申请日：1974-01-16

Applicant: BASF AG

Inventor： BOEHM HANS DR ,  DAUBACH EWALD DR ,  HERRMANN MANFRED DR

IPC: C09B67/46 ,  C09B67/00

Abstract: Conc. aq. dispersions of dyes with low solubility in water, contg. (A) 40-60 wt. % dispersion or vat dyes, and (B) a dispersing agent consisting of a condnsn. prod. of phenol, formaldehyde (or formaldehyde donor) and Na2SO3 or NaHSO3 in aq. medium in ratio of 1:1-4: 0.3-1-6 mols in presence of 0.05-0.5 mol NaOH per mol phenol at 125-200 degrees C and condnsn time of 1-8h. Stable dispersions are obtd. with reduced amts. of dispersing agent, allowing high concns. of dye without excessive viscosity. Yellowing of fibres, esp. when dispersions of optical brighteners are used, and harmful effects on the brightness or exhaustion props of the dyes are avoided.

公开(公告)号：DE920516C

公开(公告)日：1954-11-25

申请号：DEB0020027

申请日：1952-04-18

Applicant: BASF AG

Inventor： BOEHM HANS DR

IPC: G01K5/12