Amphoteric condensates and their use in retanning

Details Amphoteric condensates and their use in retanning Amphoteric condensates and their use in retanning

1985-01-24

1987-06-23

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

8 9419R, 8 9421, 8636, C14C 318

Patent

active

046750215

ABSTRACT:
Amphoteric condensates of the general formula I ##STR1## where A is a benzene or naphthyl radical, B is a radical derived from the group consisting of urea, biuret, dicyanodiamide or melamine, or a mixture of these radicals, X is --CH.sub.2 --COOH, CH.sub.3 --CH--COOH, CH.sub.3 --CH.sub.2 --CH--COOH, (CH.sub.3).sub.2 C--COOH or --CH.sub.2 --CH.sub.2 --COOH, R is H, alkyl of 1 to 4 carbon atoms or one of the radicals, X, Y is --CH.sub.2 SO.sub.3 H or --SO.sub.3 H, Z is alkyl of 1 to 4 carbon atoms or alkoxy of 1 to 4 carbon atoms, m is from 1 to 10, n is from 0 to 5, p is from 0 to 2, q is from 0 to 2, and o is 4-(p+q) if A is benzene, and is 6-(p+q) if A is naphthyl, and their alkali metal and ammonium salts for retanning, and a process for retanning and dyeing mineral tanned leathers

REFERENCES:
patent: 4390340 (1983-06-01), Lach

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