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Positive type infrared light sensitive composition and positive heat-sensitive lithographic plate

A composition, infrared light technology, applied in printing plate preparation, photosensitive materials for opto-mechanical equipment, printing, etc., can solve the problems of poor thermal stability, poor sensitivity stability of plate materials, etc. Shortened thermal stability time and stable sensitivity performance

Active Publication Date: 2010-07-07
LUCKY HUAGUANG GRAPHICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the disadvantages of poor thermal stability after long-time processing of the existing heat-sensitive positive printing plate at high temperature, and poor sensitivity stability of the plate during use, and provide a post-processing method at high temperature. A photosensitive composition for a positive thermal CTP plate with short time and stable sensitivity, and a positive thermal lithographic plate using the photosensitive composition

Method used

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  • Positive type infrared light sensitive composition and positive heat-sensitive lithographic plate
  • Positive type infrared light sensitive composition and positive heat-sensitive lithographic plate
  • Positive type infrared light sensitive composition and positive heat-sensitive lithographic plate

Examples

Experimental program
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Effect test

Embodiment 1

[0043] (1) Preparation of polymer infrared dye:

[0044] The alkali-soluble resin used in the preparation of the polymer infrared dye is the methylolation product R-32 of the m-cresol aldehyde resin produced by the second film factory of the Lucky Group shown in the structural formula II, and the molecular weight is between 8,000 and 10,000.

[0045] 100g of methylol phenolic resin R-32 was dissolved in 400ml of N,N-dimethylformamide to make a solution. At 40°C, 0.2 g of sodium halide was slowly added to the solution. The reaction was stirred for 30 minutes. Dissolve 20 g of 2-[2-[2-chloro-3-[2-(1,3-dihydro-1,1,3-trimethyl-2H- Phenylindole-2-ylidene)-acetal]-1-cyclopenten-1-yl]-ethylene]-1,1,3-trimethyl-1H-phenylindole tetramethylbenzenesulfonate Salt solution, slowly added to the solution containing R-32 resin. The reaction was carried out for 10 hours. The solution was then cooled at room temperature and the product was isolated by settling in water. The product was co...

Embodiment 2

[0053] (1) Preparation of polymer infrared dye:

[0054] The alkali-soluble resin used in the preparation of the polymer infrared dye is the methylolation product RM-1 of the m-cresol aldehyde resin produced by the second film factory of the Lucky Group shown in the structural formula II.

[0055] 100g of methylol phenolic resin RM-1 was dissolved in 400ml of N,N-dimethylformamide to make a solution. At 40°C, 0.2 g of sodium halide was slowly added to the solution. The reaction was stirred for 30 minutes. Dissolve 20 g of 2-[2-[2-chloro-3-[2-(1,3-dihydro-1,1,3-trimethyl-2H- Phenylindole-2-ylidene)-acetal]-1-cyclopenten-1-yl]-ethylene]-1,1,3-trimethyl-1H-phenylindole tetramethylbenzenesulfonate Acid solution, slowly added to the solution containing RM-1 resin. The reaction was carried out for 10 hours. The solution was then cooled at room temperature and the product was isolated by settling in water. The product was collected by vacuum filtration, rinsed with water and ai...

Embodiment 3

[0063] (1) Preparation of polymer infrared dye:

[0064] The alkali-soluble resin used in the preparation of the polymer infrared dye is the methylolation product BTB-29 of the m-cresol aldehyde resin produced by Weihai Tiancheng Chemical Industry shown in structural formula I.

[0065] 100g of methylol phenolic resin BTB-29 was dissolved in 400ml of N,N-dimethylformamide to make a solution. At 40°C, 0.2 g of sodium halide was slowly added to the solution. The reaction was stirred for 30 minutes. Dissolve 20 g of 2-[2-[2-chloro-3-[2-(1,3-dihydro-1,1,3-trimethyl-2H- Phenylindole-2-ylidene)-acetal]-1-cyclopenten-1-yl]-ethylene]-1,1,3-trimethyl-1H-phenylindole tetramethylbenzenesulfonate Add salt solution slowly to the solution containing BTB-29 resin. The reaction was carried out for 10 hours. The solution was then cooled at room temperature and the product was isolated by settling in water. The product was collected by vacuum filtration, rinsed with water and air dried. ...

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Abstract

The invention relates to a positive type infrared light sensitive composition and a positive heat-sensitive lithographic plate comprising the same. The photosensitive composition comprises the following components in part by weight: 30 to 60 parts of macromolecular infrared dye, 40 to 60 parts of linear phenolic resin and 0 to 10 parts of background dye, wherein the macromolecular infrared dye has functions of light energy and heat energy conversion and dissolution inhibitor for compounds; and a micromolecular dissolution inhibitor and an acid-generating source are not used in an imaging system so as to avoid the instability of the acid-generating source. The lithographic plate manufactured by using the photosensitive composition overcomes the defects that the positive heat-sensitive lithographic plate needs post processing at high temperature for a long time and the thermal stability is poor. The plate has stable light sensitivity during use. The method adopts the components, so the thermal stability time of the plate is shortened and the light sensitivity of the plate is stable.

Description

technical field [0001] The technical field of the present invention is imaging information recording materials, that is, the technical field of high-sensitivity printing and plate making, and specifically relates to a photosensitive composition for positive-working thermosensitive CTP plates, and also relates to positive-working thermal CTP plates. Lithographic plates made of photosensitive compositions. Background technique [0002] The tremendous changes that CTP technology has brought to the printing industry have long been seen by people in the industry, and have been accepted and recognized by more and more printing companies. With regard to the development trend of CTP technology, thermal CTP plate making technology is becoming more and more mature and popular, and the development of new thermal CTP plates with excellent performance has become one of the focuses of printing plate manufacturers. [0003] The heat-sensitive coating of the existing positive heat-sensitiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/004G03F7/09B41C1/00
Inventor 刘明芳赵伟建滕方迁李合成张振亚李长山
Owner LUCKY HUAGUANG GRAPHICS
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