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Ultraviolet and visible light sensitive positive image type imageable element and method for forming image

An imaging element, visible light technology, applied in the direction of photosensitive materials for optomechanical equipment, etc., can solve problems such as chemical erosion of materials

Pending Publication Date: 2020-05-08
ZHEJIANG KONITA NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to overcome the defects that the existing materials used for positive-working imageable elements are easily corroded by chemicals, and to provide an infrared-sensitive imageable element with good resistance to alcohol-containing chemicals And the lithographic printing plate precursor prepared by using the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Imageable Element Example 1 Preparation of a Lithographic Printing Plate Precursor (PP-a)

[0095] (1) Inner coating: Dissolve 0.50 g of polymer binder PB-a and 0.01 g of background dye Victoria Blue BO in 6.5 g of ethylene glycol monoethyl ether, 2.0 g of butanone-2, 0.5 g of butyrolactone and 0.5 grams of water in a solvent mixture. The above composition solution was coated on the aluminum plate substrate obtained by electrochemical roughening and anodic oxidation treatment by spin coating method, and then dried in an oven at 145°C for 3 minutes to obtain 1.2 g / m 2 inner coat weight. The inner coating was soaked in isopropanol for 1 minute without obvious dissolution or peeling off, demonstrating its excellent alcohol resistance.

[0096] (2) Top coat: 0.10 g of photosensitizer PW205, 0.33 g of phenolic resin 6564LB, and 0.01 g of methyl violet were dissolved in a solvent mixture of 5.8 g of propylene glycol monomethyl ether and 3.8 g of methyl isobutyl ketone. Uti...

Embodiment 2

[0098] Imageable Element Example 2 Preparation of a Lithographic Printing Plate Precursor (PP-b)

[0099] (1) Inner coating: Dissolve 0.50 g of polymer binder PB-b, 0.01 g of acid generator WPI-169 and 0.01 g of Victoria Blue BO in 6.5 g of ethylene glycol monoethyl ether, 2.0 g of butanone-2, 0.5 g of butyrolactone and 0.5 g of water in a solvent mixture. The above composition solution was coated on the aluminum plate substrate obtained by electrochemical roughening and anodic oxidation treatment by spin coating method, and then dried in an oven at 145°C for 3 minutes to obtain 1.2 g / m 2 inner coat weight. The inner coating was soaked in isopropanol for 1 minute without obvious dissolution or peeling off, demonstrating its excellent alcohol resistance.

[0100] (2) Outer coating: Dissolve 0.10 g of PW205 photosensitizer, 0.31 g of EP-0090G, 0.02 g of acid generator triazine D and 0.01 g of methyl violet in 5.8 g of propylene glycol monomethyl ether and 3.8 g of butanone-2 ...

Embodiment 3

[0102] Imageable Element Example 3 Preparation of a Lithographic Printing Plate Precursor (PP-c)

[0103] (1) Inner coating: Dissolve 0.45 g of polymer binder PB-c, 0.05 g of phenolic resin PD494A and 0.01 g of Victoria Blue BO in 4.5 g of ethylene glycol monomethyl ether, 3.5 g of butanone-2, 1.0 g of butyrolactone and 1.0 g of water in a solvent mixture. The above composition solution was coated on the aluminum plate substrate obtained by electrochemical roughening and anodic oxidation treatment by spin coating method, and then dried in an oven at 145°C for 3 minutes to obtain 1.2 g / m 2 inner coat weight. The inner coating was soaked in isopropanol for 1 minute without obvious dissolution or peeling off, demonstrating its excellent alcohol resistance.

[0104](2) Outer coating: Dissolve 0.09 g of photosensitizer PW205, 0.32 g of phenolic resin 6564LB, 0.02 g of acid generator Irgacure 250 and 0.01 g of methyl violet in 5.8 g of propylene glycol monomethyl ether and 3.8 g o...

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PUM

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Abstract

The invention provides an ultraviolet and visible light sensitive positive image type imageable element. The imageable element comprises (a) a substrate, (b) an inner coating layer covering the substrate, and (c) an outer coating layer covering the inner coating layer. The inner coating layer comprises a repeating unit derived from a maleimide monomer and an acrylamide or methacrylamide monomer, and a polymer binder P soluble in an alkaline developing solution; the outer coating layer comprises a photosensitizer and another polymeric binder Q different from the inner coating layer. Due to thedesign, the imageable element can be sensitive to radiation with a maximum wavelength of 350-450 nm; and when being used as a precursor of a lithographic printing plate, the imageable element has goodresistance to a chemical solvent and is not easy to erode and dissolve by printing chemicals in a use process so that a service life of the lithographic printing plate is favorably prolonged.

Description

technical field [0001] The invention belongs to the field of printing plates for lithographic offset printing, and in particular relates to a positive imageable element sensitive to ultraviolet and visible light. The invention also relates to a method of obtaining a lithographic printing plate from the imageable element. Background technique [0002] The imageable elements used to prepare lithographic printing plates generally comprise one or more imageable layers, comprising one or more radiation-sensitive components. Following radiation imaging, the exposed or non-exposed areas of the imageable layer are removed by a suitable developer, exposing the underlying hydrophilic surface of the support. If exposed areas are removed, the imageable element is considered positive working, and conversely, if non-exposed areas are removed, the imageable element is considered negative working. In either case, the areas of the imageable layer that are not removed are ink-receptive, wh...

Claims

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Application Information

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IPC IPC(8): G03F7/004G03F7/09
CPCG03F7/004G03F7/09
Inventor 陶烃翁银巧徐能平高邈应作挺马显瑶潘枫常士旺
Owner ZHEJIANG KONITA NEW MATERIALS