Composite active black dye

Abstract

The present invention relates to a kind of disazo dyestuffs composition, the described composite active blank dyestuff mainly contains four dyestuffs, said invention also provides their structure formulas. The described composite dyestuff is suitable for dyeing dark colour fabrics, such as cellulose fibre, cotton fibre and synthetic fibre, etc., and has good level-dyeing property, repeatability, high dyeing fastness, fastness to washing and wet rubbing fastness.

Description

(1) Technical field [0001] The invention relates to a bisazo dye composition. (2) Background technology [0002] Black dyes are indispensable and used in large quantities in textiles. In the past, sulphur black was used to dye cellulose fibers, but sulphur black caused serious environmental pollution during use. With the continuous improvement of people’s requirements for textile fabrics’ feel, texture, comfort, color fastness and environmental protection, reactive dyes have become the current development trend to replace sulfur dyes in dyeing black. However, the use of general reactive dyes to dye black is dry and wet. The fastness to rubbing and staining of white cloth has been difficult to meet customer requirements. [0003] The most widely used reactive black GR currently on the market is compounded by adding orange components on the basis of CI Reactive Black 5. Its alkali resistance, water fastness and jet blackness are not ideal. Patent CN1524904 discloses Although compos...

AI Technical Summary

Problems solved by technology

[0002] Black dye is an indispensable and widely used variety in textiles. In the past, sulfur black was mostly used for dyeing cellulose fibers, but sulfur black caused serious environmental pollution during the use process.

With the continuous improvement of people's requirements for the feel, texture, comfort, color fastness and environmental protection of textile fabrics, it has become the current development trend to dye black with reactive dyes instead of sulfur dyes. The fastness to rubbing and staining of white cloth has been difficult to meet customer requirements

[0003] The most widely used reactive black GR on the market is compounded by adding orange components on the basis of C.I. reactive black 5. Its alkali resistance, color fastness to water and blackness are not ideal. Patent CN1524904 discloses Although composite reactive black dyes have been greatly improved in terms of color fixing rate, level dyeing property, and washing fastness, the dyeing depth (blackness) still needs to be improved.

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