Composition comprising the addition product of a vinyl-sulfone dye and a secondary amine and process for dyeing a polyamide therewith

Claim 1

A dyestuff composition comprising the addition product of a fiber reactive, water-soluble dye of the formula: D--(SO.sub.2 --Z).sub.n wherein D represents a dye chromphore selected from the anthraquinone, dioxazine, formazon, phthalocyanine, monoazo and disazo series and their metal copper, chromium, cobalt or iron complexes; wherein Z represents the group --CH═CH 2 or CH 2 --CH 2 --Y; wherein Y is a substituent, capable of being split off by an alkaline reagent, selected from hydroxy, chloro, bromo, thiosulfato, sulfato, acyloxy, dimethylamino and diethylamino; wherein n is an integer equal to 1 or 2; with a secondary amine selected from an N-alkyl-amino-alkylsulfonic acid, an N-alkyl-amino-alkyl-carboxylic acid, the water-soluble salts thereof and mixtures of said acid and salts; and said secondary amine having the formula: ##STR17## wherein A represents a sulfonic acid or carboxylic acid moiety or a water-soluble salt thereof, R represents a lower alkyl group of 1 to 4 carbons and "a" represents an integer from 1 to 25 ; said composition containing about 0.5 to 1.0 mole of said secondary amine per mole of said dye present in said composition.

Claim 29

A method for modifying a water-soluble, vinyl-sulfone dyestuff for the purpose of attaining a uniform color shade when said dyestuff is used to dye a synthetic polyamide fiber comprising a. adding to said vinyl-sulfone dyestuff from about 0.5 to about 1 mole of a secondary amine selected from a N-alkyl of 1 to 5 carbons--amino-alkyl of 1 to 25 carbons--sulfonic acid, or N-alkyl of 1 to 5 carbons--amino-alkyl of 1 to 25 carbons--carboxylic acid or their water-soluble salts per mole of vinyl-sulfone dye in said dyestuff; and b. said secondary amine being added in an amount effective to produce a uniform color shade after reaction with said vinyl-sulfone dye when applied to a synthetic polyamide fiber from an acidic aqueous solution having a pH value in the range of about 3 to 4 to dye to polyamide fiber.

Claim 30

A method for modifying a water-soluble, vinyl-sulfone dyestuff for the purpose of attaining a uniform color shade when said dyestuff is used to dye a synthetic polyamide fiber comprising a. adding to said vinyl-sulfone dyestuff from about 0.5 to about 1 mole of a secondary amine selected from a N-alkyl of 1 to 5 carbons--amino-alkyl of 1 to 25 carbons--sulfonic acid, or N-alkyl of 1 to 5 carbons--amino-alkyl of 1 to 25 carbons--carboxylic acid or their water-soluble salts per mole of vinyl-sulfone dye in said dyestuff; and b. said secondary amine being added in an amount effective to produce a uniform color shade after reaction with said vinyl-sulfone dye when applied to a synthetic polyamide fiber from an acidic aqueous solution having a pH value in the range of about 3 to 4 to dye to polyamide fiber.