Dye compound reducing agent and method of using the same

A reducing agent and dye technology, applied in the field of vat dye dyeing and fiber dyeing, can solve the problems of high energy consumption, decreased leather strength, increase vat dye leuco, leuco acid stability, etc., to improve the color yield. efficiency, increase stability, and avoid the effects of environmental protection and human body hazards

Inactive Publication Date: 2009-01-21
SHANGHAI TEXTILE GRP DETECTION STANDARD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some foreign related patents have made some improvements in solving the above problems, but there are certain problems: R.C.SHAH (Textile Chemist and Colorist, VOL4, No11, NOV7, 1972, P59-61) can delay the oxidation rate of hydrosulfite by adding protective colloid , thereby increasing the stabilit...

Method used

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  • Dye compound reducing agent and method of using the same
  • Dye compound reducing agent and method of using the same
  • Dye compound reducing agent and method of using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1: Polyester fiber and polyurethane composition synthetic leather dyeing

[0067] Synthetic leather composed of 0.02 denier polyester fiber and polyurethane, unit weight 700g / M 2 , Dye with C.1.VAT.Brown.5#, 6% (2006.11 / 22) with vat dye leuco, leuco acid dyeing process.

[0068] (A) make the reducing leuco body of the present invention according to Table 1, i.e. the three compound reducing agents, solid NaOH and water to prepare the reducing solution, wherein the concentration of the three compound reducing agents is 27.0g / L (i.e. 10.8g / L hydrosulfite plus 10.8g / L thiourea dioxide and 5.4g / L sodium sulfite, totally 27.0g / L), NaOH concentration is 11.5g / L; With dry cylinder method, the leucosome is modulated to dye reduction, reducing solution: dye=37.5: 1 (weight Ratio), after 8 minutes, heat the water (1:1 with dye-reduced leuco body fluid), and make the mixing temperature 50°C for use;

[0069] (B) Add the dispersant lignosulfonate ammonium salt to the dy...

Embodiment 2

[0076] Embodiment 2: Synthetic leather dyeing composed of superfine polyamide and polyurethane

[0077] A blended fiber in a ratio of 0.02 denier ultrafine polyamide:polyurethane=65%:35% (weight ratio) was dyed.

[0078] Prepare reducing solution of the present invention according to Table 1, wherein hydrosulfite: thiourea dioxide: sodium sulfite=1.0: 1.0: 1.0, the dyeing process is the same as in Example 1, except that step (B) dyeing pre-dyeing step lye in Example 1 is not used to adjust the dye bath pH treatment, directly add acidic buffer solution in the reducing leuco body, adjust the dye into leuco acid, add the osmotic swelling agent of the present invention: 0.00025 parts by weight of lauryl azone, 2.0 parts by weight of N-methylpyrrolidone, diacetone alcohol 8.0 parts by weight, 10.0 parts by weight of ethyl salicylate, 9.0 parts by weight of isopropyl salicylate, dye with leuco-chromic acid, heat up to 105°C at 1°C / 2min, and keep warm for 40 minutes. The color fastn...

Embodiment 3

[0083] Embodiment 3: Polyurethane polymer composition synthetic leather dyeing

[0084] Polyurethane polymer dyed. Prepare reducing solution of the present invention by table 1, wherein hydrosulfur powder: thiourea dioxide: sodium sulfite=2: 4: 1, dyeing process is the same as embodiment 1, just do not pass through step (B) dyeing pre-dyeing stage in embodiment 1 and adjust with lye Dyeing bath pH treatment, in the step (A) in embodiment 1, directly add acidic buffering agent, adjust dyestuff into leucoic acid, add osmotic swelling agent of the present invention: lauryl azone 0.0002 weight part, N-methyl 4 parts by weight of pyrrolidone, 6.0 parts by weight of diacetone alcohol, 8.0 parts by weight of ethyl salicylate, 10.0 parts by weight of isopropyl salicylate, dyed with reduced leucochromic acid, 1 ° C / 2 min to 85 ° C, at 85 ° C Keep warm for 45-60 minutes for dyeing, the color fastness is very good.

[0085] The following table 4 is the dyeing result of the present em...

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Abstract

The invention discloses a composite reducing agent for dye, comprising the following compositions in weight portion: 8 to 20 portions of vat powder, 5 to 40 portions of thiourea dioxide, and 5 to 15 portions of sodium sulfite. The invention also discloses a method for dyeing by the reducing agent, comprising the following steps that: a reducing agent and sodium hydrate are used for reducing the dye by a vatting method; the weight ratio of a reducing solution to the dye is 37.5: 0.8 to 2.0 and the mixture is for later use; a leveling agent and the fiber penetrating swelling agent are added to dye or a buffering agent is added to adjust the pH value and is dyed by vat acid, the temperature is reduced and the mixture is washed; the mixture is subjected to oxidization to develop color, fixing, reducing temperature and washing; the fresh water bath is performed, the dye composite reducing agent is reduced and washed, and the temperature is reduced and the fiber penetrating swelling agent is produced. The composite reducing agent for the dye is a special reducing agent used for reducing the dye, a sulfur dye, a perylene dye and a leuco body, and improves the stability of the leuco body, color yield percentage, the color reproducibility, the color fixation and the color evenness degree, meanwhile, the dye composite reducing agent avoids the harm of formaldehyde on the environment and the human body.

Description

technical field [0001] The invention relates to a dye compound reducing agent and a dyeing method thereof, belonging to the technical field of fiber dyeing, especially the technical field of dyeing with vat dyes. Background technique [0002] Vat dyes have good color fastness, especially good color fastness to sunlight and soaping, but there are still some problems such as poor permeability, suspension dyeing color flower and unstable leuco body when dyed with leuco acid and leuco body. The problem is not resolved. [0003] The vat dye leuco dyeing method is to turn the insoluble vat dye into a water-soluble dye through alkali treatment, but at this time, the dyed sodium salt is no longer the original color, so it is called leuco, and the dye leuco is dyed The method is called leucosome staining. After dyeing, use the oxidation method to return to the original insoluble color development state. Leuco dyeing with traditional vat dyes, because the pH is around 12.0, will ca...

Claims

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Application Information

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IPC IPC(8): D06P1/22D06P1/645D06P1/673
Inventor 武达机张德良方磊周勤谦姚民富
Owner SHANGHAI TEXTILE GRP DETECTION STANDARD CO LTD
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