Process for coloring synthetic textile materials

Details Process for coloring synthetic textile materials Process for coloring synthetic textile materials

1996-08-15

1998-06-02

Einsmann, Margaret

Bleaching and dyeing; fluid treatment and chemical modification

Multiple chemically diverse fibers or fibers with different...

8662, 8688, 8690, 8921, 8922, 8924, D06P 326, D06P 354, D06P 372, D06P 385

Patent

active

057592128

DESCRIPTION:

BRIEF SUMMARY
This application claims benefit of international application PCT/GB95/00160, filed Jan. 27, 1995.
The present invention relates to a process for colouring synthetic textile materials, to synthetic textiles when coloured, to a process for the mass coloration of plastics, to plastics when coloured, to certain novel dyes and to compositions containing dyes.
According to the present invention there is provided a process for coloring a synthetic textile material or fibre blend thereof which comprises applying to the synthetic textile material a dye, which is free from water solubilising groups, carrying at least one --SO.sub.2 F group provided that the dye is not an azo, bisazo or anthraquinone dye.
The presence of one or more --SO.sub.2 F groups in a dye molecule generally improves the properties of that dye and confers surprisingly good wet-fastness and light-fastness properties.
The synthetic textile material may be selected from secondary cellulose acetate, cellulose triacetate, polyamide, polyacrylonitrile and aromatic polyester. The synthetic textile material is preferably polyamide or aromatic polyester, such as polyhexamethylene adipamide or polyethylene terephthalate more preferably aromatic polyester and especially polyethlene terephthalate. Fibre blends may comprise mixtures of different synthetic textile materials or mixtures of synthetic and natural textile materials. Preferred fibre blends are those of polyester cellulose such as polyester-cotton. The textile materials or blends thereof may be in the form of filaments, loose fibres, yarn, woven or knitted fibres.
The present dyes preferably have low solubility in water, typically less than 1% preferably less than 0.5% and especially less than 0.2% solubility in water. The present dyes are thus free from water solubilising groups such as --SO.sub.3 H, --CO.sub.2 H, --PO.sub.3 H and quaternary amino.
The dyes of the present invention as herein described optionally in admixture with each other and optionally in conjunction with other disperse dyes such as azo, bisazo or anthraquinone dyes may be applied to the synthetic textile materials or fibre blends thereof by methods which are conventionally employed in dyeing disperse dyes to such materials and fibre blends. For example, the dyes of the present invention in the form of an aqueous dispersion may be applied by dyeing, padding or printing processes using the conditions and additives conventionally used in carrying out such processes. 125.degree. C. to 140.degree. C. for from 10 to 120 minutes and under a pressure of from 1 to 2 bar, a sequestrant may be optionally be added; 190.degree. C. to 225.degree. C. for from 15 seconds to 5 minutes, a migration inhibitor may optionally be added; 160.degree. C. to 185.degree. C. for 4 to 15 minutes for high temperature steaming, or at a temperature of from 190.degree. C. to 225.degree. C. for 15 seconds to 5 minutes for bake fixation with dry heat or at a temperature of from 120.degree. C. to 140.degree. C. and 1 to 2 bar for 10 to 45 minutes for pressure steaming, wetting agents and thickeners (such as alginates) of from 5 to 100% by weight of the dye may be optionally be added; drying and overprinting) at a pH of from 4 to 6.5, migration inhibitors and thickeners may optionally be added; 95.degree. C. to 100.degree. C. using a carrier such as methylnaphthalene, diphenylamine or 2-phenylphenol, sequesterants may optionally be added; and to 6.5, at a temperature of 85.degree. C. for acetate or at a temperature of 90.degree. C. for triacetate and nylon for from 15 to 90 minutes, sequesterants may optionally be added.
In all the above processes the dye is applied as a dispersion comprising from 0.00% to 4% of the dye in aqueous medium.
The present compounds generally provide coloured textile material which shows good fastness to washing, light and heat.
The dye may be a heterocyclic or carbocyclic compound and is preferably selected from one of the following dye classes benzothioxanthene, styryl, couimarn, naphtholactam, quinophthalone, aminodicyanobenzanthron

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patent: 4159192 (1979-06-01), Mockli
patent: 5503956 (1996-04-01), Kaszczuk et al.

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