Printing plate protective coating and preparation method thereof

A protective coating and printing plate technology, which is applied in the field of printing plate protective coating and its preparation, can solve the problems that the printing plate does not have comprehensive properties, achieve good chemical inertness and thermal stability, large bond energy, and surface friction coefficient small effect

Active Publication Date: 2021-09-21
安徽强邦新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Printing plates need to be reused and are in direct contact with inks containing a large amount of organic solvents during work. Therefore, printing plates are required to have excellent hardness, abrasion resistance, solvent resistance and acid and alkali corrosion resistance. , printing plates do not have good overall performance, therefore, the invention provides a protective coating for printing plates and a preparation method thereof

Method used

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  • Printing plate protective coating and preparation method thereof
  • Printing plate protective coating and preparation method thereof
  • Printing plate protective coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Described modified acrylic resin is prepared by the following steps:

[0037] Step A1: Take a three-necked flask equipped with a stirrer and a thermometer, add acrylic acid to the three-necked flask, then add thionyl chloride to the three-necked flask, control the stirring speed to 500r / min, and the reaction temperature to 55°C for 40 minutes. Intermediate 1 was prepared, wherein the ratio of acrylic acid to thionyl chloride was 1 mol: 1.15 mol;

[0038] Step A2: Mix hexafluoroisopropanol and tetrahydrofuran into a three-necked flask, add aqueous sodium hydroxide solution to the three-necked flask, adjust the pH value of the mixture to 10, and stir at a stirring speed of 120r / min and a water bath temperature of 45°C , using a dropping funnel to add intermediate 1 dropwise to a three-necked flask, after the dropwise addition, keep the temperature for 1 hour, wash the reaction mixture with deionized water, leave it to separate layers, and remove the oily liquid in the low...

Embodiment 2

[0041] Described modified acrylic resin is prepared by the following steps:

[0042] Step A1: Take a three-necked flask equipped with a stirrer and a thermometer, add acrylic acid to the three-necked flask, then add thionyl chloride to the three-necked flask, control the stirring speed to 600r / min, and the reaction temperature to 56°C for 45 minutes. Intermediate 1 was prepared, wherein the ratio of acrylic acid to thionyl chloride was 1 mol: 1.15 mol;

[0043] Step A2: Mix hexafluoroisopropanol and tetrahydrofuran into a three-necked flask, add aqueous sodium hydroxide solution to the three-necked flask, adjust the pH value of the mixture to 10, and stir at a stirring speed of 130r / min and a water bath temperature of 48°C , using a dropping funnel to drop intermediate 1 into a three-necked flask. After the dropwise addition, keep the temperature for 1.2 hours, wash the reaction mixture with deionized water, let it stand for layers, and remove the oily liquid in the lower layer ...

Embodiment 3

[0046] Described modified acrylic resin is prepared by the following steps:

[0047] Step A1: Take a three-necked flask equipped with a stirrer and a thermometer, add acrylic acid to the three-necked flask, then add thionyl chloride to the three-necked flask, control the stirring speed to 700r / min, and the reaction temperature to 58°C for 50 minutes. Intermediate 1 was prepared, wherein the ratio of acrylic acid to thionyl chloride was 1 mol: 1.15 mol;

[0048] Step A2: Mix hexafluoroisopropanol and tetrahydrofuran into a three-necked flask, add aqueous sodium hydroxide solution to the three-necked flask, adjust the pH value of the mixture to 10, and stir at a stirring speed of 150r / min and a water bath temperature of 50°C , use a dropping funnel to drop intermediate 1 into a three-necked flask. After the dropwise addition is completed, keep the temperature for 1.5 hours, wash the reaction mixture with deionized water, let it stand for layers, and remove the oily liquid in the...

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Abstract

The invention discloses a printing plate protective coating and a preparation method thereof, belongs to the technical field of printing, and solves the problem that a printing plate in the prior art does not have good comprehensive performance. The protective coating is prepared from the following raw materials in parts by weight: 100-115 parts of modified acrylic resin, 7.5-8.2 parts of modified nano silicon dioxide, 1.2-1.5 parts of a dispersing agent, 0.8-1.1 parts of a defoaming agent, 1.3-1.7 parts of a flatting agent and 0.4-0.7 part of an adhesion promoter. The raw materials are stirred, subjected to vacuum bubble removal and ultrasonic dispersion to prepare a composite coating, then the composite coating is coated on the surface of a printing plate, and the the composite coating is dryed to obtain a protective coating. According to the prepared modified acrylic resin, a main chain is separated from the outside by fluorine atoms of a side chain, direct action with the outside is avoided, the corrosion resistance and solvent resistance of the resin are improved, the nano silicon dioxide is modified by the silane coupling agent, the compatibility is improved, the nano silicon dioxide is uniformly distributed in a coating, and the hardness and wear resistance of the coating are improved.

Description

technical field [0001] The invention belongs to the technical field of printing, and in particular relates to a printing plate protective coating and a preparation method thereof. Background technique [0002] The structure principle of CTP direct plate-setting machine is similar to that of imagesetter. The plate-making equipment is directly controlled by a computer, scanned and imaged by a laser, and then developed and fixed to generate a printing plate that can be directly printed on the machine. Computer-to-plate-making adopts a digital workflow, directly converts text and images into numbers, and directly generates printing plates, eliminating the need for film material imposition and printing processes. The printing plate that is directly imaged by infrared laser scanning exposure is a kind of CTP plate, called thermal CTP plate. This heat-sensitive plate usually includes a hydrophilic carrier and a heat-sensitive polymer coating. The heat-sensitive polymer coating ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/16C09D143/04C09D7/62C09D5/08C08F220/24C08F230/08
CPCC09D143/04C09D7/62C09D5/08C08F220/24C08F230/085C08K2201/011C08K9/06C08K3/36
Inventor 孙长义郭俊成李长华
Owner 安徽强邦新材料股份有限公司
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