UV-cured plate base coating for ink-jet printing direct plate making and preparation method thereof

An inkjet printing, plate-based technology, applied in polyester coatings, polyether coatings, epoxy resin coatings, etc., can solve the problems of polluting the environment, difficult to achieve environmental protection and practicality, etc. Treatment process, the effect of improving hydrophilicity

Active Publication Date: 2017-01-18
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the above patents have insurmountable defects. If the coating is a solvent system, a large amount of solvent will become VOC during the coating, drying and curing process of the coating system, polluting the environment.
However, if the coating system is a water-based system, firstly it is difficult to uniformly disperse the oxide particles in the resin system, and secondly, the fountain solution in the printing environment will continuously erode the coating as a hydrophilic layer, so it is difficult to make a water-based coating To achieve both high printing durability and stable printing effect, the most important thing is that it is difficult to achieve real environmental protection and practicality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Will account for the polyester acrylate resin of coating total amount 40wt%, the zinc oxide (particle diameter 200nm) of 20wt%, the 2,4,6-trimethylbenzoyl diphenyl phosphine oxide of 5wt%, the benzene of balance Oxyvinyl acrylates were mixed, stirred at room temperature, and ground for 12 hours with a ball mill or a horizontal sand mill to obtain the coating. The aluminum plate that has not been treated by electrolytic graining and anodic oxidation is washed with acetone and water successively, and dried. The above-mentioned coating is coated on the aluminum plate after drying by the spin coating method, and after 1 minute of UV light curing (main wavelength 365nm), the plate base that can be used for inkjet printing direct plate making is obtained, and the contact angle between the plate base and water is measured as 22.3 degrees.

Embodiment 2

[0020] Will account for the novolak epoxy acrylate resin of coating total amount 30wt%, the zinc oxide (particle size 200nm) of 25wt%, the 2-phenyl-2 of 2wt%, 2-dimethylamino-1-(4-morpholine benzene Base)-1-butanone and the rest of the propoxylated neopentyl glycol diacrylate were mixed, stirred at room temperature, and ground for 8 hours with a ball mill or a horizontal sand mill to obtain the coating. The aluminum plate that has not been treated by electrolytic graining and anodic oxidation is washed with acetone and water successively, and dried. Apply the above paint on the dried aluminum plate by extrusion coating, and after UV light curing for 0.5 minutes (main wavelength 365nm), a plate base that can be used for inkjet printing direct plate making is obtained, and the contact between the plate base and water is measured The angle is 14.5 degrees.

Embodiment 3

[0022] Will account for the urethane acrylate resin of coating total amount 60wt%, the silicon dioxide (500nm of particle size) of 10wt%, the 2-methyl-1-(4-methylmercaptophenyl)-2-morpholine-1 of 1wt% - Acetone, 1wt% isopropyl thioxanthone, 5wt% ethoxylated trimethylolpropane triacrylate, and the rest of acryloylmorpholine are mixed and stirred at room temperature, using a ball mill or a horizontal sand mill Grinding for 5 hours gave the coating as described. Wash the PET plate successively with acetone and water, and dry it. Apply the above paint on the dried PET plate by roller coating method, and after UV light curing for 2 minutes (main wavelength 365nm), a plate base that can be used for inkjet printing direct plate making is obtained, and the contact angle between the plate base and water is measured It is 19.9 degrees.

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Abstract

The invention discloses a UV-cured plate base coating for ink-jet printing direct plate making and a preparation method thereof. The UV-cured plate base coating comprises, by mass, 5-70 parts of a UV-cured prepolymer, 10-50 parts of oxide particles, 0.01-10 parts of a photoinitiator and 1-30 parts of a UV-cured reactive monomer. The UV-cured prepolymer contains hydroxyl and / or carboxyl function groups. After UV curing, a part of the hydroxyl and / or carboxyl function groups are still retained. In ink-jet printing plate making, the hydroxyl and / or carboxyl function groups residual in the coating and plate making ink undergo a crosslinking chemical reaction so that the plate making ink is cured on the coating, plate pressrun is improved and a plate making precision is greatly improved. The UV-cured plate base coating has pressrun of 100000 after ink-jet plate making.

Description

technical field [0001] The invention belongs to the technical field of printing plate preparation, and in particular relates to a UV-curable plate-base coating for direct plate-making by inkjet printing and a preparation method thereof. Background technique [0002] Inkjet Computer To Plate (Inkjet Computer To Plate) is a technology that uses inkjet printing equipment to directly spray images on the printing plate base. It is a method of lithographic offset printing that is different from traditional PS plate exposure plate making. The printing plate base mainly uses aluminum plate base. In order to improve the printing durability and resolution of the aluminum plate base, the aluminum plate is usually anodized and grained (see CN85100875). During anodic oxidation, a large amount of acid and alkali must be used to pretreat the aluminum plate. Acid and alkali waste liquid not only easily cause great pollution to the environment, but also increase the overall cost of the plat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D163/10C09D175/14C09D133/04C09D171/08C09D183/04C09D133/00C09D171/00C09D7/12
Inventor 刘云霞秦明明杨明张佑专王思宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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