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Preparation method of printing paste for reactive dye direct printing

A printing paste and reactive dye technology, applied in the field of chemical printing and dyeing, can solve the problems of poor thickening effect and water retention, printing color paste failure, short color paste stability period, etc., to achieve obvious thickening effect, soft hand feeling, Good printing uniformity

Inactive Publication Date: 2020-08-11
沈阳科技学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alginic acid, a natural polysaccharide carbohydrate extracted from kelp, is insoluble in water and cannot be used as an active printing paste, so it is neutralized with sodium carbonate to form sodium alginate, a strong base and weak salt, although sodium alginate is in water It has high solubility, good water-retaining property, clear printing outline, high depaste rate, and the printed fabric feels soft after washing, but it is easily hydrolyzed. The color paste prepared by it has a short stability period when used, and can only be stored for 2 days at room temperature. , it needs to be equipped and used immediately in summer, which is inconvenient and causes a lot of waste
Sodium alginate is a kind of strong base and weak acid salt. After being dissolved in water, it will undergo hydrolysis reaction to form water-insoluble alginic acid, which will make its thickening effect and water retention worse, and reactive dyes will be precipitated from printing paste. , causing the printing paste to fail

Method used

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  • Preparation method of printing paste for reactive dye direct printing
  • Preparation method of printing paste for reactive dye direct printing
  • Preparation method of printing paste for reactive dye direct printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Take 1wt% sulfuric acid (catalyst) and add it to 55wt% glycolic acid and keep stirring at 60°C to fully dissolve the sulfuric acid.

[0020] 2) Add 100g of 15wt% alginic acid slurry to the above 7.8g solution while stirring, adjust the pH to 3.5, mix evenly, and stir and reflux for 24 hours at a reaction temperature of 120°C-135°C.

[0021] 3) Wash the product after the reaction in 2) with absolute ethanol for 3-4 times, recover the washing solution, dry the cleaned product at a temperature of 85°C-100°C, remove excess ethanol, and obtain alginate glycolate powder .

[0022] Take 3) the obtained powder and make it into a paste with a mass fraction of 2%, and use a viscometer to measure the viscosity. The higher the viscosity, the better the paste. The paste was kept at a constant temperature of 60°C for 24 hours, and the viscosity was measured every 4 hours. Track the viscosity change of the paste, the smaller the viscosity change, the better the paste stability. ...

Embodiment 2

[0024] 1) Take 1wt% sulfuric acid (catalyst) and add it to 15wt% oxalic acid solution, stir for 15 minutes to fully mix sulfuric acid and oxalic acid.

[0025] 2) Add 100g of 15wt% alginic acid slurry to the above 33.89g solution while stirring, adjust the pH to 3 after mixing evenly, and stir and reflux for 24 hours at a reaction temperature of 120°C-135°C.

[0026] 3) Wash the product after the reaction in 2) with absolute ethanol for 3-4 times, recover the washing solution, dry the cleaned product at a temperature of 85°C-100°C, remove excess ethanol, and obtain alginate oxalate powder.

[0027] Take 3) the obtained powder and make it into a paste with a mass fraction of 2%, and use a viscometer to measure the viscosity. The higher the viscosity, the better the paste. The paste was kept at a constant temperature of 60°C for 24 hours, and the viscosity was measured every 4 hours. Track the viscosity change of the paste, the smaller the viscosity change, the better the past...

Embodiment 3

[0029] 1) Take 1wt% sulfuric acid (catalyst) and add it to 55% propionic acid, stir in a cold water bath for 15 minutes, so that the sulfuric acid and propionic acid are fully mixed.

[0030] 2) Add 100g of 15wt% alginic acid slurry to the above 9.24g solution while stirring, adjust the pH to 2 after mixing evenly, and stir and reflux for 24 hours at a reaction temperature of 100°C-135°C.

[0031] 3) Wash the product after the reaction in 2) with absolute ethanol for 3-4 times, recover the washing solution, dry the cleaned product at a temperature of 85°C-100°C, remove excess ethanol, and obtain alginate propylate solid.

[0032] Take 3) the obtained powder and make it into a paste with a mass fraction of 2%, and use a viscometer to measure the viscosity. The higher the viscosity, the better the paste. The paste was kept at a constant temperature of 60°C for 24 hours, and the viscosity was measured every 4 hours. Track the viscosity change of the paste, the smaller the visco...

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Abstract

The invention discloses a preparation method of printing paste for reactive dye direct printing, and belongs to the technical field of chemical printing and dyeing. The method comprises the followingsteps: taking 1-5wt% of sulfuric acid or phosphoric acid as a catalyst; reacting alginic acid with HO-R-COOH and HOOC-R-COOH (R = alkyl, phenyl or naphthenic base) for 12-24 hours according to the mass ratio of 1: 1.2-1: 3 under the condition that the pH value is 2-5 and the reaction temperature is 100-135 DEG C, cleaning with an ethanol solution after the reaction is finished, and drying the product at 85-100 DEG C to obtain alginate powder, namely the prepared printing paste. The alginate reactive dye printing paste prepared by the method is high in solubility in water, good in water wrapping property, clear in printing outline, high in paste removal rate, soft in hand feeling of a printed fabric after being washed with water, good in stability, obvious in thickening effect and not easyto hydrolyze.

Description

technical field [0001] The invention belongs to the technical field of chemical printing and dyeing, and in particular relates to a preparation method of printing paste used for direct printing of reactive dyes. Background technique [0002] Printing paste refers to the substance added to the printing paste to thicken, and generally can be dissolved in water or fully swelled and dispersed in water to form a colloidal solution. When preparing the printing paste, after the reactive dye is dissolved in water, it is evenly dispersed in the printing paste, that is, the printing paste is the carrier of the printing paste. Preparation of printing paste for printing paste directly affects the quality of printing, such as technical indicators such as color yield, printing clarity, dyeing rate and penetration degree, and paste residue after printing. Therefore, printing paste occupies an important position in printing production, and is one of the main factors restricting product qua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/04D06P1/38D06P1/48
CPCC08B37/0084D06P1/38D06P1/48
Inventor 刘鹏远何鑫厉安昕卞鹏苏忠奎武立忠庞磊
Owner 沈阳科技学院
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