Hoechst Celanese Corporation

Thomas V Chambers

Thomas S Phillips

Kevin D Costa

Manfred Deicke

Suzanne C Fleming

Werner Russ

A method for the exhaust dyeing of materials having hydroxy groups and materials containing carbonamide groups using a low salt content dye bath in conjunction with fiber reactive dyes exemplified by a dye of the following formula: ##STR1##

Fiber reactive dyes - applications with low salt

This invention is directed to a dyestuff composition comprising the reaction product of a water-soluble, vinyl-sulfone type, reactive dye and a N-alkyl-amino-alkyl sulfonic acid and/or carboxylic acid or the salts thereof wherein the N-alkyl-amino-alkyl acid or salt is reacted with said dye in an amount of about 0.5 to 1.0 mole per mole of dye. This dyestuff composition is used to dye synthetic polyamides according to a process where said composition is applied to a polyamide fiber from an aqueous solution having a pH from about 3 to about 4; preferably 3.5 and then fixed to said fiber by heat.

Growing community of inventors

Rock Hill, SC, United States of America

Thomas V Chambers