CONDENSATION PRODUCTS CONTAINING SULPHONIC ACID GROUPS THEIR MANUFACTURE AND THEIR USE

摘要

New condensation products of the formula wherein R represents alkyl, cycloalkyl, aralkyl, aryl, or halogen. M represents hydrogen, an alkali metal or alkaline earth metal or an ammonium group, and n is a number from 1 to 3; these products are particularly useful as dyeing assistants for dyeing synthetic polyamide fibres with anionic dyes.