Dyeing with organic dyestuffs dispersed in an organic liquid

Claim 2

In a process wherein a substrate comprising fibers of a high molecular weight, hydrophobic synthetic organic or artificially modified cellulosic material or a blend thereof is dyed by impregnating the material to be dyed with a liquor containing a dyestuff suitable for dyeing said material and fixing the dyestuff on the material, the improvement which comprises employing as the dye liquor a stable dispersion which is substantially free of water and consists essentially of (x) a dyestuff suitable for dyeing the material to be dyed, dispersed in (y) an organic liquid in which the dyestuff is not significantly soluble at room temperature and which has a boiling point in the range of about 80° to 170° C., and (z) an alkyd resin dissolved in the organic liquid and having an acid number below 25 and free from rapid drying oils having an iodine number greater than 100, said component (x) being present in an amount of about 0.01 to 4 weight percent of said liquor and said component (z) being present in an amount of 0.05 to 5 parts per part of component (x) and, after fixation of the dye, removing any unfixed dye and any alkyd resin remaining on the material.

Claim 3

A process according to claim 1, wherein an amide of an alkanoic acid with 1 to 3 carbon atoms or phosphoric acid tris-(dimethylamide) is added to the dyeing dispersion.

Claim 4

A process according to claim 1 wherein the material to be dyed is selected from the group consisting of linear aromatic polyesters, polyamides, homopolymers and copolymers of acrylonitrile, polypropylene, cellulose acetate, cellulose triacetate and blends thereof.

Claim 5

A process according to claim 1 wherein the material is padded with the dye liquor and the fixation of the dyestuff is effected by treatment at a temperature of 100° to 230° C. in dry air, steam or solvent vapor.

Claim 6

A process according to claim 1 wherein component (y) is an organic liquid in which component (x) is soluble to an extent of less than 2 grams per liter.

Claim 7

A process according to claim 1 wherein the major proportion of component (x) is in the form of 0.01 to 10 micron particles.

Claim 8

A process according to claim 1 wherein the dye liquor contains less than 10 grams of dyestuff per liter.

Claim 9

A process according to claim 1, wherein component (z) contains a non-drying vegetable oil.

Claim 10

A process according to claim 1, which comprises exhaust dyeing or pad dyeing a material selected from the group consisting of linear aromatic polyester, polyamides, homopolymers and copolymers of acrylonitrile, polypropylene, cellulose acetate, cellulose triacetate and blends of said materials with a stable, substantially water-free dispersion consisting essentially of (x) a dyestuff which is suitable for dyeing the material to be dyed and which is selected from the group consisting of disperse dyes, premetallized dyes, acid dyes, reactive dyes, and basic dyes and the major proportion of which is in the form of 0.01 to 10 micron particles, dispersed in (y) an organic liquid in which the dyestuff is soluble to an extent of less than 2 grams per liter and which has a boiling point in the rage of about 80° to 170° C., and (z) an alkyd resin dissolved in the organic liquid and having an acid number below 25 and free from rapid drying oils having an iodine number greater than 100, said component (x) being present in an amount of about 0.01 to 4 weight percent of the dispersion and said component (z) being present in an amount of 0.2 to 2 parts by weight per part of component (x).

Claim 11

A process to claim 9, wherein component (y) is a halogenated hydrocarbon.

Claim 12

A process according to claim 9 wherein the dye liquor contains less than 10 grams of dyestuff per liter.

Claim 13

A process according to claim 10 wherein component (y) is perchlorethylene or trichloroethylene.