公开(公告)号：DE3001301A1

公开(公告)日：1981-07-23

申请号：DE3001301

申请日：1980-01-16

Applicant: BASF AG

Inventor： FISCHER KARL HEINZ ,  JOHN GERHARD ,  ZISSEL ALFRED DIPL CHEM DR

IPC: D06P1/651 ,  D06P3/30 ,  D06P1/673 ,  D06P1/39 ,  D06P1/64

Abstract: Treatment of anionically tanned or retanned leather prior to dyeing with anionic dyes in aq. soln. is carried out by treating the leather with a NH4 salt (I) and an aldehyde or dialdehyde (II) at a pH of 3-8 (pref. 4.5-6). (I) is suitably (NH4)2SO4, NH4Cl or NH4 formate or acetate. (II) is pref. glutaraldehyde. The treatment is pref. effected at 20-70 (esp. 40-50) deg.C for 10-120 (esp. 20-50) min using 50-200%, based on leather wt., of an aq. soln. contg. (I) and (II) in a (I):(II) equiv. ratio of 1-2:1. The amt. of (I) used is pref. equiv. to 1.5-3 wt.% (NH4)2SO4, based on leather wt. The treatment improves the depth of colour achievable with anionic dyes, giving intense even shades with good fastness.

公开(公告)号：DE2313063A1

公开(公告)日：1974-09-19

申请号：DE2313063

申请日：1973-03-16

Applicant: BASF AG

Inventor： KLINGSHIRN WERNER DIPL CHEM DR ,  ZISSEL ALFRED DIPL CHEM DR ,  HERTEL OTTO DIPL CHEM DR

IPC: C14C3/18

Abstract: Title prod. obtd. by mixing (a) at least one methylol deriv. of a mononuclear, monohydric phenol of a binuclear phenol (free from condensed rings and contg. one phenolic group on each nucleus), the phenols being free from anionic gps., (b) at least one densation prod. of a naphthalene sulphonic acid with an aldehyde or aldehyde-yielding cpd. and (c) at least one condensation prod. of a phenol-sulphonic acid with urea and formaldehyde (which, if desired, is further condensed with formaldehyde and phenol), in wt. ratio a:b:c = (3-7):(2-6):(0.3-2), dissolving the mixt. in water, subjecting the resulting soln. in mechanical motion for >1 hr. above 30 degrees C and finally removing the water by evaporation.