Amphoteric condensates and their use in retanning

US4675021A · kind A · utility

Assignee

• BASF SE

Inventors

• Dietrich Lach
• Rolf Streicher · Worms, DE
• Rainer Strickler · Heidelberg, DE

Key dates

• Filing date: Jan 24, 1985
• Grant date: Jun 23, 1987
• Expiry date: Jan 24, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C14C3/18
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

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