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Resin for water-based ink as well as preparation method and application of resin

A water-based ink and resin technology, applied in the field of ink manufacturing, can solve the problems of improving gloss and image bleeding, and achieve excellent storage stability and scratch resistance, excellent gloss, good water resistance and adhesion Effect

Active Publication Date: 2015-04-29
CHINA BANKNOTE INK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the composition of the resin on the surface of the pigment, the hydrophilic and hydrophobic characteristics have relatively strict requirements on the type and polarity of the organic solvent added, in order to obtain a stable pigment dispersion, the available solvents are greatly limited, improving gloss and Image bleeding problem is relatively difficult

Method used

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  • Resin for water-based ink as well as preparation method and application of resin
  • Resin for water-based ink as well as preparation method and application of resin
  • Resin for water-based ink as well as preparation method and application of resin

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preparation example Construction

[0038] 1. Preparation of water-based ink

[0039] Prepare water-based ink according to the general method in this industry, use the ink resin prepared by the present invention as the binder of the pigment, 1,2-hexanediol, 3-ethylene glycol monobutyl ether as the penetrating agent, and glycerin as the wetting agent , 1-methyl-2-pyrrolidone as a dissolution stabilizer, carbon black as a pigment, and deionized water as a solvent.

[0040] Preparation method: Add each component of the formula in Table 1 into the container in turn, stir and mix with an electric stirrer (rotating speed: 200r / min) for 12 hours, and then let it stand for 2 hours. Filter with a membrane filter with a pore size of 5.5 μm to remove impurities such as dust or coarse particles, measure the pH of the system with a pH meter, and adjust the pH between 8.0 and 9.5 with triethanolamine. It should be noted that all the numerical values ​​in Table 1 are expressed in mass %, and deionized water was added so that ...

Embodiment 1

[0077] (1) Add polyoxyethylene ether ammonium sulfate (chemical trade name: LATEMUL PD-104) emulsifier aqueous solution 10.7g (weight solid content 20.6wt%, Japan Kao) in 43g deionized water, 6.2g isooctyl thioglycolate, While stirring, add 72.4 g of methyl methacrylate and 27.6 g of methacrylic acid for emulsification to obtain monomer emulsified dispersion A;

[0078] (2) In the glass reactor (Shanghai Heqi Glass Instrument Co., Ltd.) equipped with a reflux condenser, a separatory funnel, a thermometer, and a nitrogen pipe, add 220.0 g of deionized water and 0.05 g of ammonium bicarbonate pH regulator, Heat up to 85°C, add 40g of 5% ammonium persulfate aqueous solution at 85°C, add the monomer emulsion dispersion A of step (1) into the reactor with a plunger pump (Tokyo Physical and Chemical VSP-1050) after 1 minute, After 2 hours of dropping, continue to react for 0.5 hours after the dropping, add ammonia water with a weight concentration of 15% to the reactor, adjust the p...

Embodiment 2

[0081] Add 0.5 g of polyoxyethylene alkyl ether (chemical trade name: LATEMUL PD-420) emulsifier and 4.0 g of isooctyl thioglycolate into 43 g of deionized water, and add 87.68 g of methyl methacrylate and methacrylic acid while stirring. 12.32 g was emulsified to obtain monomer emulsified dispersion liquid A.

[0082] Add 220 g of deionized water and 0.05 g of ammonium bicarbonate pH regulator to a glass reactor (Shanghai Heqi Glass Instrument Co., Ltd.) equipped with a reflux condenser, a separatory funnel, a thermometer, and a nitrogen pipe, and heat up to 85 ° C. Add 30 g of 5% ammonium persulfate aqueous solution at 85° C., and add the monomer emulsified dispersion A in the early stage into the reactor with a plunger pump (Tokyo Physical and Chemical VSP-1050) after 1 minute. After 0.5 hours, dropwise add Continue the reaction for 1.5 hours after completion, add ammonia water with a weight concentration of 22% in the reactor to adjust the pH to 8.0g, and keep it warm for ...

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Abstract

The invention provides resin for water-based ink as well as a preparation method and an application of the resin. The water-based ink is prepared from the following components in percentage by weight: 0.5-30% of pigment colorant, 0.5-10% of the resin for the water-based ink, 5-20% of wetting agent, 0.5-20% of impregnating agent, 5-15% of dissolution stabilizer and the balance of deionized water. The resin for the water-based ink is a polymer microparticle emulsion which is prepared from free radical polymerization monomers in a semi-continuous emulsion copolymerization manner by taking an alkali-soluble high-molecular polymer as an emulsifier and in the presence of a water-soluble peroxide initiator; the particle size of the polymer microparticle emulsion is 50-180nm, the acid value of the emulsion is 30-100mgKOH / g and the glass-transition temperature Tg of the emulsion is from -50 to 50 DEG C. The change of the viscosity of the resin for the water-based ink along with temperatures is low, and therefore, a nozzle cannot be blocked; the water-based ink is suitable for printing on glossy paper and common painting paper; besides, the printed materials are clear in image, good in glossiness, and excellent storage stability and scratch resistance.

Description

technical field [0001] The invention belongs to the technical field of ink manufacturing, and in particular relates to a water-based ink used for an inkjet printer. Background technique [0002] In recent years, inks for inkjet recording formulated with pigments as colorants have been increasingly used. Because the pigment has no solubility in water, it needs to be dispersed in water in the form of fine particles, but it is very difficult to maintain this stable dispersion state. Usually, the stable dispersion of pigment ink is achieved by using a combination of dispersant and pigment. [0003] Japanese Patent Laid-Open No. 56-28256 proposes the use of resin emulsions to improve the ejection stability and image blur of ink in the nozzle of an inkjet printer. Japanese Patent Publication No. 4-18462 proposes to use a microemulsion containing 0.5-10% by weight of a pigment and having an average particle diameter of 50 nm or less to improve the scratch resistance of ink on a re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/06C08F220/18C08F212/08C08F2/26C08F2/30C09D11/30
Inventor 陈夏萌陈苗刘祥孟庆飞胡战峰黄维维李伟
Owner CHINA BANKNOTE INK
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