A kind of all-aqueous ink and preparation method thereof

An all-water-based, ink-based technology, used in inks, air quality improvement, household appliances, etc., can solve the problem of poor compatibility of colorant system and rheological property adjustment system, weak preparation technology of ink precursor pigment colorant, and poor stability of water-based ink. and other problems, to achieve excellent tinting strength and adhesion fastness, good water solubility and resolubility, and good wettability.

Active Publication Date: 2022-06-03
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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  • A kind of all-aqueous ink and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0034] To prepare a water-soluble grinding resin solution:

[0035]5.0L of solvent acetone was added to the 10.0L reactor, and 40g of hydroxyethyl methacrylate (HEMA), 60g of glycidyl methacrylate (GMA), 80g of alginic acid (A) and 200g of styrene (S) were added under nitrogen atmosphere , 5g dibenzoyl peroxide (BPO) was used as initiator, and the temperature was raised to reflux and stirred to carry out radical polymerization reaction for 18-24h;

[0036] Then the acetone was removed under reduced pressure. After the acetone was evaporated to dryness, deionized water was slowly added to adjust the non-volatile components to 35wt%. Finally, 0.2mol / L sodium hydroxide aqueous solution was used to adjust the acid value of the system resin liquid to 168 to obtain a quaternary copolymer. water-soluble grinding resin solution.

Embodiment 1

[0038] Adopt the water-soluble grinding resin liquid prepared in Manufacturing Example 1 as grinding resin to prepare base material, and the method is as follows:

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

Embodiment 2

[0052] During 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 μm; so the present invention systematically optimizes the grinding temperature of the base material, the method is as follows:

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

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Abstract

The invention belongs to the technical field of printing, and in particular relates to an all-aqueous ink and a preparation method thereof. The present invention adopts hydroxyethyl methacrylate, glycidyl methacrylate, styrene and alginic acid as raw materials to prepare a water-soluble grinding resin solution for quaternary copolymerization to form a base material with stable performance; The all-water-based ink prepared with solvent and water has good fluidity, high color concentration, and good printability; the printed matter has high gloss, good leveling, adhesion fastness and resistance comparable to solvent ink, and no harmful substances remain after drying . Prints are anti-blocking, anti-migration, abrasion-resistant and water-resistant. It can be used for surface printing of shopping bags, medical packaging, transfer bags and food bags printed on the surface of BOPP, PET, PE / PEVA and other plastic substrates.

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 began to use dyes and benzene as inks, which were only suitable for simple packaging requirements. Because the dye is not resistant to migration and the light fastness is insufficient, the pigment is used as the dyeing agent in the later stage, which improves the relevant performance of the ink. Until the early 1990s, with the improvement of national environmental protection awareness and the gradual improvement of national policies and regulations, solvent inks experienced a painful process of abandoning phenone. Until today, solvent inks have replaced toluene, Xylene, butanone, etc., have made great progress in the environmental protection of ...

Claims

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Application Information

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Patent Type & Authority Patents(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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