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Method for improving color fastness of pigment ink by using multifunctional hyperbranched dispersant

A pigment ink, multifunctional technology, applied in dyeing method, ink, application, etc., can solve the problems of decreased stability, hard hand feeling, low color fastness of fabrics, etc., and achieve the effect of small particle size and good stability

Active Publication Date: 2014-12-17
KUNSHAN YIJIAJU TEXTILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of pigment inks such as unsmooth ink jetting, decreased stability, low color fastness, dull color, and hard hand feeling caused by the use of a large amount of binders to fix the color, the invention provides a multifunctional hyperbranched dispersant Method for Improving Color Fastness of Pigment Ink

Method used

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  • Method for improving color fastness of pigment ink by using multifunctional hyperbranched dispersant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Dissolve the monomer 0.98g maleic anhydride, 1.04g styrene and 0.10g p-vinylbenzyl mercaptan in a beaker containing 40g toluene, stir until the solid dissolves, and then dissolve 0.23g azobisisobutyronitrile in the beaker. Stir in a beaker with 20 g of toluene until the solids are completely dissolved. Add 1 / 3 of the mixed monomer solution and the initiator solution to a 100ml four-necked flask with a condenser, stir and heat up to 65°C, and after the reaction for 30min, start to drop the remaining monomer solution and initiator solution respectively. into the reaction solution. After the dropwise addition, the reaction was continued for 24 h, and 0.2 g of p-toluenesulfonic acid and 1.6. g of methanol were added thereto, and the reaction was continued at 50° C. for 48 h. After the reaction is completed, it is cooled to room temperature, and the obtained product is suction filtered, washed with petroleum ether for 3 times and then dried to obtain a hyperbranched multifu...

Embodiment 2

[0034] Dissolve 0.75g of hyperbranched multifunctional dispersant into 44.25g of aqueous sodium hydroxide solution (pH=11), then add 5g of Pigment Red 122, adjust the pH of the system to 8-9, stir magnetically for 30min, ultrasonicate for 25min or grind to an average When the particle size is less than 200 nm, the hyperbranched dispersion C.I. Pigment Red 122 color paste is obtained, and the average particle size of the pigment particles is 170 nm.

Embodiment 3

[0036] Weigh 40g hyperbranched dispersion C.I. Pigment Red 122 color paste, then add 5g adhesive, 3g ethanol, 15g pentaerythritol, 10g ethylene glycol, 10g glycerol, 1g isopropanol, 2g Tween 20, 14g deionized The water is mixed evenly, stirred at 500 rpm for 30 minutes with a mixer, then adjusted to pH 9 with sodium hydroxide, and filtered through a 500 nm microporous membrane to obtain the pigment ink. The physical properties of this ink at 25°C are as follows: surface tension σ=30.6mN / m, viscosity η=7.88cP, Z-average particle size d=142.3nm, and Zeta potential ξ is -28.2mV. The ink was sprayed onto the fabric by an inkjet printer, and after drying, it was placed at 130° C. for 5 minutes for curing. The color fastness of the fabric was tested by a rubbing fastness tester, and its dry rubbing fastness and wet rubbing fastness were both grades 4-5. The ink has good ink jet printing fluency, bright colors, and soft handfeel of printed fabrics.

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Abstract

The invention discloses a method for improving the color fastness of pigment ink by using a multifunctional hyperbranched dispersant, belonging to the field of fine chemical engineering. The method comprises the following steps: uniformly stirring and mixing 30-50% of a hyperbranched dispersed pigment colorant, 1-5% of an adhesive, 10-50% of a water soluble cosolvent and 1-5% of a nonionic surfactant by mass, wherein water is added to fill to 100% if 100% is not satisfied); adjusting the pH value of the ink to 8-10; and filtering to obtain the hyperbranched dispersed pigment ink. The pigment granules in the ink prepared by the method are small in diameter and relatively excellent in stability. A fabric subjected to jet printing by the ink is roasted and fixated to obtain relatively excellent color fastness. The preparation method and an application method are simple, and the ink has a good application prospect.

Description

technical field [0001] The invention relates to a method for improving the color fastness of pigment ink by using a multifunctional hyperbranched dispersant, and belongs to the field of fine chemicals. Background technique [0002] Textile digital inkjet printing technology is a new type of textile printing technology that integrates computer network system, digital processing and information system, precision machining and fine chemical materials. Printing on the fabric improves the printing accuracy and realizes small batch, multi-variety and multi-color printing, which has broad development prospects. Due to the special requirements of inkjet printing on the printing fastness and stability of the ink, it is necessary to have a special ink to match it. Therefore, the research and development of digital printing ink is a key step to promote the development of digital inkjet printing technology. At present, pigment-based inks with good versatility and simple printing proce...

Claims

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Application Information

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IPC IPC(8): C09D11/326D06P5/30
Inventor 付少海关玉张丽平谭莹田安丽
Owner KUNSHAN YIJIAJU TEXTILE CO LTD
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