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Negative type infrared light responsive composition, negative type printing plate and method of use thereof

A composition and infrared light technology, applied in the field of printing plates, can solve the problems of unstable plate quality, etc., and achieve the effects of good preservation performance, high printing resistance, and good repayment

Active Publication Date: 2009-05-27
LUCKY HUAGUANG GRAPHICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the existing boards that the quality of the boards becomes unstable over time, and to provide a high-sensitivity, storage Negative working infrared sensitive composition with good performance, good print resistance and good chemical resistance

Method used

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  • Negative type infrared light responsive composition, negative type printing plate and method of use thereof
  • Negative type infrared light responsive composition, negative type printing plate and method of use thereof
  • Negative type infrared light responsive composition, negative type printing plate and method of use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of Infrared Sensitive Composition

[0036] (a) Synthesis of hydrophilic polymer I: Add 500ml of absolute ethanol in a 1L four-necked round-bottomed flask equipped with a sealed mechanical stirring device, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, start stirring, and feed Dry nitrogen and bubble through for 15 min. Heat the water bath to 60°C. After the temperature is constant, add dropwise a solution consisting of 144g of acrylic acid (2mol), 142g of acrylamide (2mol), 1g of benzoyl peroxide and 200ml of absolute ethanol from which the polymerization inhibitor has been removed, for 30 minutes Drip finished. After maintaining the reaction at 60° C. for 5 hours, 1 g of benzoyl peroxide was added to maintain the temperature, and the reaction was continued for 10 hours before the reaction was terminated. The reaction mixture was naturally cooled to room temperature.

[0037] The cooled reaction solution was dropped into 5 L of acet...

Embodiment 2

[0058] (1) Preparation of Infrared Sensitive Composition

[0059] (a) Synthesis of Hydrophilic Polymer II: Add 500ml of absolute ethanol to a 1L four-necked round-bottomed flask equipped with a sealed mechanical stirring device, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, start stirring, and feed Dry nitrogen and bubble through for 15 min. Heat the water bath to 60°C. After the temperature is constant, add dropwise a solution consisting of 129g of methacrylic acid (1.5mol), 213g of acrylamide (3mol), 1g of benzoyl peroxide and 300ml of absolute ethanol from which the polymerization inhibitor has been removed. , 30 minutes to drop. After maintaining the reaction at 60° C. for 5 hours, 1 g of benzoyl peroxide was added to maintain the temperature, and the reaction was continued for 10 hours before the reaction was terminated. The reaction mixture was naturally cooled to room temperature.

[0060] The cooled reaction solution was dropped into 5 L of aceto...

Embodiment 3

[0081] (1) Preparation of Infrared Sensitive Composition

[0082] (a) Synthesis of Hydrophilic Polymer III: Add 500ml of absolute ethanol to a 1L four-necked round-bottomed flask equipped with a sealed mechanical stirring device, a reflux condenser, a dropping funnel, and a nitrogen inlet tube, start stirring, and feed Dry nitrogen and bubble through for 15 min. The water bath was heated to 60°C, and after the temperature was constant, a solution composed of 172g methyl acrylate (2mol), 213g acrylamide (3mol), 1g benzoyl peroxide and 300ml absolute ethanol from which the polymerization inhibitor had been removed was added dropwise, 30 minutes to drip. After maintaining the reaction at 60° C. for 5 hours, 1 g of benzoyl peroxide was added to maintain the temperature, and the reaction was continued for 10 hours before the reaction was terminated. The reaction mixture was naturally cooled to room temperature.

[0083] The cooled reaction solution was dropped into 5 L of aceton...

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Abstract

The invention discloses a female pattern infrared light sensitizing composition and a printing plate made of the composition and an application method of the printing plate. The composition mainly contains (1) 45-74 parts by weight of hydrophilic polymer, (2) 5-30 parts by weight of epoxy compound, (3) 5-25 parts by weight of infrared absorption agent and (4) 1-12 parts by weight of an acid producing source. The female pattern infrared light sensitizing composition has the advantages of high light sensitivity, good preservation property , good printing resistance and good chemical resistance. The provided photolithography plate has the advantages of high light sensitivity, good mesh point reducibility and good preservation property, and can be directly mounted on a photolithography machine for printing after exposure.

Description

technical field [0001] The invention relates to a photosensitive composition, in particular to a photosensitive composition for making a negative printing plate, and also to a printing plate prepared with the composition and a use method thereof. Background technique [0002] In the traditional offset printing workflow, the plate is generally composed of a hydrophilic plate base and a resin layer coated on it. After exposure and development, a plate that can be printed on the machine is obtained. After exposure, the non-image part can be removed through a proper development process to expose the hydrophilic plate base. If the exposed part is removed by the development process and the unexposed part remains to form an image, it is called a positive working plate; conversely, if the exposed part remains to form an image and the unexposed part is removed, it is called a negative working plate material. The developer used in the development process is mainly composed of an aqu...

Claims

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Application Information

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IPC IPC(8): B41C1/055B41M5/36
CPCB41C1/1008B41C2210/04B41C2210/08
Inventor 江磊赵伟建宋小伟田东东
Owner LUCKY HUAGUANG GRAPHICS
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