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Preparation method of photo-curing integrated white coating ink

A light-curing, white pigment technology, used in inks, household appliances, applications, etc., can solve the problem of light-curing pigment digital inkjet printing fabrics, the color fastness to rubbing and washing resistance is difficult to achieve reactive dye printing, pigment particles and film forming. Material lack of binding force and other problems, to achieve the effect of improving color fastness and improving photopolymerization performance

Pending Publication Date: 2020-08-25
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the inherent characteristics of pigment printing, this technology has common defects of pigment printing: the pigment particles are only fixed on the fabric by means of the physical coating of polymer film-forming substances, and there is a lack of firm bonding between pigment particles and film-forming substances. , so that the color fastness to rubbing and washing of light-cured pigment digital inkjet printing fabrics is difficult to reach the level of reactive dye printing
This method improves the reactivity of the organic pigment and the polymerization system to a certain extent, but the surface coating layer and the organic pigment still exist in the form of physical coating.

Method used

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  • Preparation method of photo-curing integrated white coating ink

Examples

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Effect test

Embodiment 1

[0035] A kind of preparation method of photocuring integrated coating ink, its preparation method is as follows:

[0036] (1) Add 1g of white titanium dioxide to 24ml of ethanol and 6ml of deionized aqueous solution, carry out ultrasonic dispersion for 30min, and at the same time add 0.6g of 3-aminopropyltriethoxysilane to 80ml of ethanol and 20ml of deionized aqueous solution for hydrolysis reaction 30min. After the hydrolysis reaction is completed, add the separated white titanium dioxide, adjust the pH to 7, and adjust the temperature to 70°C for 1 hour. After the reaction is completed, centrifuge and wash three times (10000 rpm, 10 minutes / time). Dry and set aside.

[0037] (2) Weigh 2.22g of isophorone diisocyanate and add it to a three-necked flask filled with nitrogen, weigh 5g of polypropylene glycol and slowly add it dropwise to the above-mentioned three-necked flask and gradually heat up to 80°C, add 1-2 drops of Catalyst, react for 3 hours, lower the temperature t...

Embodiment 2

[0040] A kind of preparation method of photocuring integrated coating ink, its preparation method is as follows:

[0041] (1) Add 1g of white silicon dioxide to 24ml of ethanol and 6ml of deionized aqueous solution, carry out ultrasonic dispersion for 30min, and at the same time add 0.7g of 3-aminopropyltrimethoxysilane to 80ml of ethanol and 20ml of deionized aqueous solution for hydrolysis React for 30 minutes. After the hydrolysis reaction is completed, add the separated white silica, adjust the pH to 7, and adjust the temperature to 70°C for 1 hour. After the reaction is completed, centrifuge and wash three times (10000 rpm, 10 minutes / time). Dry and set aside.

[0042](2) Weigh 2.22g of diphenylmethane diisocyanate and add it to a three-necked flask filled with nitrogen, weigh 4.5g of polypropylene glycol and slowly add it dropwise to the above-mentioned three-necked flask and gradually heat up to 70°C, drop 1-2 Drop the catalyst, react for 4 hours, lower the temperatur...

Embodiment 3

[0045] A kind of preparation method of photocuring integrated coating ink, its preparation method is as follows:

[0046] (1) Add 1g of white calcium carbonate to 24ml of ethanol and 6ml of deionized aqueous solution, and carry out ultrasonic dispersion for 30min, while adding 0.4g of 3-aminopropyltriethoxysilane to 80ml of ethanol and 20ml of deionized aqueous solution for hydrolysis React for 30 minutes. After the hydrolysis reaction is completed, add the separated white calcium carbonate, adjust the pH to 7, and adjust the temperature to 70°C for 1 hour. After the reaction is completed, centrifuge and wash three times (10000 rpm, 10 minutes / time). Dry and set aside.

[0047] (2) Weigh 2.22g of isophorone diisocyanate and add it to a three-necked flask filled with nitrogen, weigh 4.5g of polyethylene glycol and slowly add it dropwise to the above-mentioned three-necked flask and gradually heat up to 80°C, drop 1 - 2 drops of catalyst, react for 3 hours, lower the temperatu...

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Abstract

The invention discloses a preparation method of photo-curing integrated white coating ink, which comprises the following steps: (1) modifying a white pigment for later use; (2) carrying out a reactionon an oligomer polyol and a diisocyanate compound in a nitrogen atmosphere to prepare a polyurethane prepolymer, then, ultrasonically dispersing the modified white pigment prepared in the step 1 in asolvent and then adding the solution into the polyurethane prepolymer for reaction, finally, adding an end-capping reagent for end capping to obtain an integrated white coating; and (3) adding a photo-initiation system and an acrylate monomer into the integrated white coating according to a certain ratio, and fully and uniformly stirring to obtain the integrated photo-curing coating ink. The surface of the white pigment is modified, so that a pigment-cured film cross-linked structure is formed in the curing process of the ink. Not only is the photopolymerization performance of the ink improved, but also the color fastness of the coating ink is improved.

Description

technical field [0001] The invention belongs to the field of photocurable ink preparation, and in particular relates to a preparation method of photocurable integrated white paint ink. Background technique [0002] Light-curing digital printing technology uses photoinitiators, additives, oligomers, etc. to carry out cross-linking and curing reactions, so that the colorant forms a cured film and adheres to the surface of the fabric. In view of the inherent characteristics of pigment printing, this technology has common defects of pigment printing: the pigment particles are only fixed on the fabric by means of the physical coating of polymer film-forming substances, and there is a lack of firm bonding between pigment particles and film-forming substances. , so that the color fastness to rubbing and washing of light-cured pigment digital inkjet printing fabrics is difficult to reach the level of reactive dye printing. [0003] Therefore, it is necessary to modify the surface o...

Claims

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Application Information

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IPC IPC(8): C09D11/101C09D11/102C09D11/037C09D11/03C08G18/76C08G18/75C08G18/67C08G18/48
CPCC09D11/101C09D11/102C09D11/037C09D11/03C08G18/7671C08G18/755C08G18/672C08G18/4825
Inventor 王成龙闫凯郑今欢刘国金柴丽琴
Owner ZHEJIANG SCI-TECH UNIV
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