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Photosensitive composition and lithograph plate made of same

A composition and lithographic technology, applied in the field of lithographic printing plates, can solve the problems of reducing the printing endurance, the printing endurance, the adaptability of high-sensitivity development and the difficulty of hydrophilicity.

Active Publication Date: 2005-03-16
LUCKY HUAGUANG GRAPHICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the hydrophilicity is increased by the above-mentioned techniques, problems such as lowering of the running force arise
Therefore, it is an extremely difficult technology to simultaneously satisfy all the properties of high printing force, high sensitivity, high developing suitability, and hydrophilicity.

Method used

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  • Photosensitive composition and lithograph plate made of same
  • Photosensitive composition and lithograph plate made of same
  • Photosensitive composition and lithograph plate made of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The invention comprises heat-crosslinking resin, latent protonic acid, infrared absorbing compound and acid proliferating agent, the amount of resin accounts for 30% of the total solids of the composition, and the amount of infrared absorbing compound accounts for the total solids of the composition The amount of potential protonic acid accounts for 60% of the total solids of the composition, and the amount of acid multiplier accounts for 5% of the total solids of the composition.

[0030] The heat-crosslinkable resin is a methylolation product of m-cresol resin, which has the following structure:

[0031]

[0032] n is a natural number of 1-12.

[0033] The heat-crosslinkable resin is obtained by using m-cresol or mixed phenol phenolic resin and formaldehyde or paraformaldehyde as raw materials, acetone or ethanol as solvent, and basic compound as catalyst, reacting under reflux and distilling under reduced pressure.

[0034] The basic compound used as catalyst in ...

Embodiment 2

[0042] In the present invention, the heat-crosslinkable resin, potential protonic acid, infrared absorbing compound and acid multiplying agent are included, and the amount of the resin accounts for 60% of the total solids of the composition, and the amount of the infrared absorbing compound accounts for 60% of the total solids of the composition. 10% of the total amount, the amount of potential protonic acid accounts for 30% of the total solids of the composition, and the amount of acid multiplier accounts for 0% of the total solids of the composition.

[0043] Described heat-crosslinkable resin is the methylolation product of mixed phenolic resin, and it has following structure:

[0044]

[0045] In the formula, R represents a hydrocarbon group, alkoxyl group, aryl group, halogen atom, etc. of 1-12 carbons, which is a hydrocarbon group or alkoxyl group or an aryl group of 1-6 carbons, and m, n represent a range between 1-12 Natural number.

[0046] The heat-crosslinkable ...

Embodiment 3

[0057] The present invention comprises heat-crosslinking resin, latent protonic acid, infrared absorbing compound and acid proliferating agent, the amount of resin accounts for 35% of the total solids of the composition, and the amount of infrared absorbing compound accounts for the total solids of the composition The amount of potential protonic acid accounted for 45% of the total solids of the composition, and the amount of acid multiplier accounted for 10% of the total solids of the composition.

[0058] The photosensitive composition according to claim 1 or 2 in the present invention is characterized in that: the thermally crosslinkable resin is a methylolation product of m-cresol aldehyde resin, which has the following structure:

[0059]

[0060] n is a natural number of 1-12.

[0061] The heat-crosslinkable resin is obtained by using m-cresol or mixed phenol phenolic resin and formaldehyde or paraformaldehyde as raw materials, acetone or ethanol as solvent, and basic...

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PUM

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Abstract

This invention discloses a light sensitive compound and the lithoprint plate using the compound. The light sensitive compound comprises the following as weight percent: 30 t0 60 percent of resin, 5 to 20 percent of infrared absorbing compound, 30 to 60 percent of potential protonic acid, 0 to 10 percent o f acid breeding agent. The lithoprint plate comprises base with a base coating layer of hydrophilicity polymer attached with the above light sensitive layer on. The sample in this invention can get print plate 1 images more than one hundred thousand times through the multiple printing plate experience. If the plate is baked under a temperature of 220 degrees for ten minutes, the printing time can be three hundred times. The printing plate 2 can achieve one hundred times, If the plate is baked under a temperature of 220 degrees for ten minutes, the printing time can achieve five hundred times.

Description

technical field [0001] The invention relates to a photosensitive material and a printing plate, in particular to a photosensitive composition and a lithographic printing plate made by using the photosensitive composition. Background technique [0002] Common photosensitive lithographic plates include a photosensitive layer on a hydrophilic base, for example, in negative-working photosensitive lithographic plates, a layer is formed on a hydrophilic The photosensitive layer that accepts ink, the non-visible coating can be removed to expose the hydrophilic plate surface. In lithography, this difference in performance is used to achieve the balance of water and ink. [0003] With the development of computer technology and laser technology, computer-to-plate technology (Computer-to-plate.CTP) is becoming more and more mature. CTP technology uses a computer to modulate and control the laser beam, scan the surface of the printing plate, and develop a plate that can be printed on ...

Claims

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Application Information

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IPC IPC(8): B05D1/00G03F7/004G03F7/16
Inventor 赵伟建王瑞强江磊焦红军侯文利刘桂翠刘万瑞
Owner LUCKY HUAGUANG GRAPHICS
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