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Lithographic printing plate precursor

一种平版印刷版、前驱体的技术，应用在平版印刷设备、印刷、印刷工艺等方向，能够解决重启着色没有效果等问题，达到着色恢复性良好、良好油墨清洗特性的效果

Inactive Publication Date: 2012-11-28
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is known that this intermediate layer is effective for problems such as tinting, toning, and scumming caused by residual coating film during development due to poor adhesion, but it is not effective for restarting the problem of toning , especially for the problem of restart coloration when printing synthetic papers with antistatic agents has no effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0191] Hereinafter, the present invention will be described in more detail as one aspect based on an example of a lithographic printing plate having a positive image-forming layer. However, the present invention is not limited to these examples. Obviously, the present invention may also be a lithographic printing plate precursor having a negative image forming layer as another aspect.

[0192]

Synthetic example 1

[0193] Synthesis Example 1 Vinylphosphonic acid / acrylamide copolymer (molar ratio 1:9) (I-1)

[0194] Add 3500 g of ethanol to a 10-liter flask equipped with a stirrer, a condenser, and a dropping device, and heat to 70° C. 231.1 g (2.14 mol) of vinylphosphonic acid monomer, 1368.9 g (19.26 mol) of acrylamide, and 52 g of AIBN were dissolved in 1000 g of ethanol, and the solution was added dropwise to the reaction device over 4 hours. During the dropwise addition of the monomer solution, a white precipitate was formed. After further heating and stirring at 70° C. for 2 hours, the heating was stopped and cooled to room temperature. The resulting precipitate was collected by filtration under reduced pressure and washed with 1000 g of ethanol. Vacuum drying at 40°C for 24 hours yielded white microcrystals. Yield 1550g

Synthetic example 2

[0195] Synthesis example 2 Vinylphosphonic acid / acrylamide copolymer (molar ratio 2:8) (I-2)

[0196] Add 3500 g of ethanol to a 10-liter flask equipped with a stirrer, a condenser, and a dropping device, and heat to 70° C. 440.5 g (4.08 mol) of vinylphosphonic acid monomer, 1159.5 g (16.31 mol) of acrylamide, and 52 g of AIBN were dissolved in 1000 g of ethanol, and the solution was added dropwise to the reaction device over 4 hours. During the dropwise addition of the monomer solution, a white precipitate was formed. After further heating and stirring at 70° C. for 2 hours, the heating was stopped and cooled to room temperature. The resulting precipitate was collected by filtration under reduced pressure and washed with 1000 g of ethanol. Vacuum drying at 40°C for 24 hours yielded white microcrystals. Yield 1550g

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Abstract

Disclosed is a lithographic printing plate precursor which can exhibit good ink clean-up properties and restart toning properties during printing. Specifically disclosed is a lithographic printing plate precursor comprising a substrate, an intermediate layer comprising a copolymer composed of a unit K and a unit L, and an image-forming layer, wherein the intermediate layer and the image-forming layer are arranged in this order on the substrate. The lithographic printing plate precursor is characterized in that the unit K is derived from a monomer represented by formula (I) (wherein R1 and Y1 are as defined in the description) or formula: CH2=CHPO(OH)2, the unit L is derived from a monomer represented by formula (II): CH2=CRCONH2 (wherein R represents H or CH3), and the copolymer contains the unit K in an amount of 3 to 40% exclusive and the unit L in an amount of 60 to 97% exclusive.

Description

technical field [0001] The present invention relates to a lithographic printing plate precursor, and more particularly, the present invention relates to a lithographic printing plate precursor having an intermediate layer between a substrate and an image forming layer. Background technique [0002] The technique of lithography is based on the immiscibility of oil and water, keeping ink selectively on image areas and water or fountain solution on non-image areas. If a properly prepared surface is wetted with water and then ink is applied, the background or non-image areas retain the water and repel the ink, and the image areas accept the ink and repel the water. The ink on the image area is then transferred to the surface of the paper, cloth, etc. material. In offset printing, ink is usually transferred to an intermediate material called a blanket, and then transferred to the surface of the material on which the image can be reproduced. [0003] Generally, an image-forming ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/11G03F7/00G03F7/004G03F7/09
CPCB41C2210/22G03F7/11B41C1/1016B41C2210/14B41C2210/02B41C2210/24B41C2210/04B41C1/1008B41C2210/06B41C2210/266B41C2201/04
Inventor 宫本靖浅轮泰浩油野丸早川英次熊住聪子
Owner EASTMAN KODAK CO