All-waterborne ink and preparation method thereof

An all-water-based ink technology, applied in the field of printing, can solve the problems of poor compatibility of color paste system and rheological property adjustment system, weak preparation technology of ink precursor pigment color paste, poor stability of water-based ink, etc., and achieve excellent tinting strength and Adhesion fastness, optimized grinding process, good wettability

Active Publication Date: 2019-07-23
山东华诺日化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the stability of water-based ink is usually poor, and the ink stability mainly refers to the pigment dispersion performance and rheological properties of the ink within a wide range of temperature changes, which remain stable and unchanged for a long time
This problem has become a bottleneck in the research and development of domestic water-based pen inks. It is manifested in the weak preparation technology of ink precursor pigment paste, poor high temperature resistance of the system, poor compatibility between color paste system and rheological property adjustment system, etc.
In addition, water-based inks have acceptable image quality and durability when printed on inkjet paper or coated substrates, but cannot produce sharp, long-lasting images when printed on non-absorbent substrates such as metal, glass and plastic
In addition, pigment-based water-soluble inks have higher requirements on the dispersibility of the base ink. Generally, the particle size of the base ink is required to be less than 1 micron; however, when the pigment particle size is small (less than 1 micron), aggregation is prone to occur, resulting in ink stability. Poor; therefore, maintaining the dispersion of the pigment while ensuring its low particle size is also an urgent problem to be solved

Method used

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  • All-waterborne ink and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0034] Preparation of water-soluble grinding resin liquid:

[0035]Add 5.0L solvent acetone to a 10.0L reactor, add 40g hydroxyethyl methacrylate (HEMA), 60g glycidyl methacrylate (GMA), 80g alginic acid (A) and 200g styrene (S) under nitrogen atmosphere , 5g dibenzoyl peroxide (BPO) as initiator, be warming up to reflux stirring and carry out free radical polymerization 18-24h;

[0036] Then remove the acetone under reduced pressure, evaporate the acetone to dryness, slowly add deionized water to adjust the non-volatile components to 35wt%, and finally use 0.2mol / L sodium hydroxide aqueous solution to adjust the acid value of the system resin solution to 168 to obtain a quaternary copolymer water-soluble grinding resin liquid.

Embodiment 1

[0038] The water-soluble grinding resin liquid prepared in manufacturing example 1 is used as grinding resin to prepare base material, and the method is as follows:

[0039] Add 240g water, 160g water-soluble grinding resin liquid, 500g pigment (roller carbon black, particle size 1.1-1.2 microns), 50g dispersant (TEGO Dispers 760W), 3.5g defoamer (TEGO Foamex 810) to the high-speed After the stirrer stirred for about 30 minutes, then add 45g thinning resin emulsion (the HC-8102B type ink resin produced by Foshan Sanshui Haocheng Synthetic Resin Co., Ltd.) and disperse with a high-speed grinder for 1-2 hours to obtain the base material; High-speed grinder dispersion refers to grinding at room temperature (20-30°C) with a grinding speed of 2000-2200 rpm; the grinding medium used in the high-speed grinder is zirconia beads with a particle size of 0.4-0.6mm. The material ratio is 4:1.

Embodiment 2

[0052] In the preparation process of the base material, the present invention surprisingly finds that the base material prepared in winter has good stability, and the particle size is basically distributed between 0.3-0.6 μm; while the base material prepared in summer has poor stability, and the particle size is basically Distributed between 1.2-1.5 μ m; so the present invention has carried out systematic optimization to the grinding temperature of base material, method is as follows:

[0053] Add 240g water, 160g water-soluble grinding resin liquid, 500g pigment (roller carbon black, particle size 1.1-1.2 microns), 50g dispersant (TEGO Dispers 760W), 3.5g defoamer (TEGO Foamex 810) to the high-speed After the stirrer stirred for about 30 minutes, then add 45g thinning resin emulsion (the HC-8102B type ink resin produced by Foshan Sanshui Haocheng Synthetic Resin Co., Ltd.) and disperse with a high-speed grinder for 1-2 hours to obtain the base material; High-speed grinder dis...

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Abstract

The invention belongs to the technical field of printing and particularly relates to all-waterborne ink and a preparation method thereof. A quaternary copolymerized water-soluble grinding resin solution is prepared from raw materials including hydroxyethyl methacrylate, glycidyl methacrylate, styrene and alginic acid, and a base material with stable performance is formed; the all-waterborne ink prepared from the base material, a connecting material, a water-soluble aid and water has good liquidity, high color concentration and good printability; a printed product is high in luster and good inleveling property, has comparable adhesion fastness and resistance with the solvent, and is free of harmful substance residues after drying. The printed product has adhesion resistance, mobility resistance, abrasion resistance and water resistance. The all-waterborne ink can be applied to surface printing of a shopping bag, a medical packaging bag, a transfer bag and a food bag made of plastic base materials such as BOPP (biaxially-oriented polypropylene), PET (polyethylene terephthalate), PE/PEVA (polyethylene/polyethylene vinyl acetate) and the like.

Description

technical field [0001] The invention belongs to the technical field of printing, and in particular relates to an all-aqueous ink and a preparation method thereof. The all-aqueous ink prepared by the invention can be used for plastic surface printing. Background technique [0002] Plastic surface printing inks began in the 1960s, and dyes and benzene were used as inks, which are only suitable for simple packaging requirements. Because the dyes are not resistant to migration and light fastness is insufficient, pigments are used as dyeing agents in the later stage, which improves the related performance of inks. Until the early 1990s, with the improvement of national environmental awareness and the gradual improvement of national policies and regulations, solvent inks experienced the painful process of abandoning benzophenone. Until today, solvent inks have used low-toxic lipids and alcohol solvents to replace toluene, Xylene, methyl ethyl ketone, etc. have made great progress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/033C09D11/106C09D11/107C08F251/00C08F220/20C08F220/32C08F212/08
CPCC09D11/033C09D11/106C09D11/107C08F251/00C08F220/325Y02A50/20
Inventor 石玉传
Owner 山东华诺日化有限公司
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