Process of dyeing with disazo dyes containing a fluorosulphonyl

Details Process of dyeing with disazo dyes containing a fluorosulphonyl Process of dyeing with disazo dyes containing a fluorosulphonyl

1996-08-08

1998-07-21

Einsmann, Margaret

Bleaching and dyeing; fluid treatment and chemical modification

Nontextile, dyeing process or product, including inorganic...

8529, 8662, 534816, 534829, 534831, D06P 326, D06P 354, D06P 372, C09B 3102

Patent

active

057829349

DESCRIPTION:

BRIEF SUMMARY
This application claims benefit of International application PCT/GB95/00127, filed Jan. 24, 1995.
The present invention relates to a process for colouring synthetic textile materials, to synthetic textile materials when coloured, to a process for the mass coloration of plastics, to plastics when coloured, to certain novel azo dyes and to compositions containing azo dyes.
According to the present invention there is provided a process for colouring a synthetic textile material or fibre blend thereof which comprises applying to the synthetic textile material a compound of Formula (1): carbocyclic group and at least one of A, D or E carries directly at least one --SO.sub.2 F group or carries a substituent to which at least one --SO.sub.2 F group is attached.
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.
Different compounds of Formula (1) may be mixed or the compounds of Formula (1) may be mixed with dyes which do not contain an --SO.sub.2 F group, such mixtures are a feature of the present invention. The mixtures may be simple physical mixtures or may be mixed crystals formed for example by co-crystallisation. Such mixtures generally show improvement in dyeing properties. Crystalline modifications of compounds of Formula (1) exist and it is intended that the present definition includes such crystalline modifications which may be formed by heat treatment.
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 dyes of Formula (1) 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 dyes of Formula (1) 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 Formula (1), optionally in conjunction with other disperse 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 Formula (1) 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. The process conditions may be selected from the following: 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

REFERENCES:
patent: 2427995 (1947-09-01), Parker et al.
patent: 2576037 (1951-11-01), Parker et al.
patent: 3131021 (1964-04-01), Baird et al.
patent: 5194463 (1993-03-01), Krutak et al.

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