Image-forming composition for heat-sensitive CTP image base, acid generating source for the composition and preparation thereof

An imaging composition and heat-sensitive technology, which can be used in printing plate preparation, optomechanical equipment, photosensitive material processing, etc., and can solve the problems of low printing durability, poor industrialization and commercialization performance

Inactive Publication Date: 2005-04-06
BEIJING NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of these plates have problems in storage stability, some are difficult to develop in dilute alkaline water to obtain clear images, and some

Method used

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  • Image-forming composition for heat-sensitive CTP image base, acid generating source for the composition and preparation thereof
  • Image-forming composition for heat-sensitive CTP image base, acid generating source for the composition and preparation thereof
  • Image-forming composition for heat-sensitive CTP image base, acid generating source for the composition and preparation thereof

Examples

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Embodiment

[0054] The present invention will be described in detail below with reference to Examples.

preparation Embodiment 1

[0057] The method for synthesizing 2,1,4-diazonaphthoquinone sulfonyloxyphthalimide ester with N-hydroxyphthalimide and 2,1,4-diazonaphthoquinone sulfonyl chloride

[0058] Get 8.15g (0.05mol) of N-hydroxyphthalimide, 13.4g (0.05mol) of 2,1,4-diazonaphthoquinonesulfonyl chloride, add 50ml N,N-dimethylformamide and 60ml Acetone, stirred to dissolve. Raise the temperature of the system to 30°C, drop a drop of 5% dilute sulfuric acid into the system, and then slowly add 5% tris Ethylamine, when the pH value of the system is about 7, pour the reaction solution into distilled water 10 times its volume, and precipitate the product. After soaking for several hours, filter it with suction, and then dry it at about 40°C to obtain a yellow powder solid , and the yield was 84%.

preparation Embodiment 2

[0060] Method for synthesizing 2,1,4-diazonaphthoquinone sulfonate by condensate of resorcinol and acetone and 2,1,4-diazonaphthoquinone sulfonyl chloride

[0061] Get 15g resorcinol acetone (0.05mol) produced by Tiancheng Chemical Company, Weihai Economic and Technological Development Zone, Shandong, 26.8g (0.1mol) 2,1,4-diazonaphthoquinone sulfonyl chloride, be dissolved in 300ml acetone, stir dissolve. Raise the temperature of the system to 35°C, drop 10% Na within 1 hour through the dropping funnel 2 CO 3 Aqueous solution 58.3g (equivalently containing 0.055mol). After the dropwise addition, keep the reaction at 35-40°C for 1 hour, then pour the reaction liquid into 10 times the amount of distilled water, adjust the pH value to 6.5 with dilute HCl, precipitate the product, filter, and rinse with distilled water for 3 times , and dried at 40-50°C to obtain a yellow powder solid product with a yield of 91%.

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Abstract

This invention provides a high sensitivity image forming composition used in heat sensitive CTP plate and its acid generating source preparation method. The said composition comprises the following countered by weight: 1 to 20 percent of heat acid generating source; 50 to90 percent of filming resin; 1 to 20 percent of cross linker; 1 to 10 percent of light to heat translation substance; 0.2 to 2 percent of color dye; and 10 to 30 percent of solvent, wherein the said weight percent values are based on the composition total mass.

Description

technical field [0001] The invention belongs to the technical field of synthesis, preparation and application of optical information recording materials. More specifically, the present invention relates to a photosensitive composition sensitive to ultraviolet light and infrared light for printing lithography, an acid-generating source for the composition and its preparation, a method for obtaining different types of CTP printing plates with the above composition, and The resulting CTP plate. technical background [0002] In the 1990s, Kodak took the lead in inventing thermal digital direct plate-making plates, referred to as thermal CTP plates (US 5340699, US 5491046, US 5466557). This kind of plate uses phenol resin as film-forming resin, uses methylol phenol resin (resol) as crosslinking agent, uses iodonium salt or trichloromethyl triazine as photoacid source, and uses benzindole A cyanine dye (which can absorb 830nm near-infrared light) is used as a photothermal conver...

Claims

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Application Information

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IPC IPC(8): B41C1/055G03F7/038G03F7/30G03F7/38
Inventor 余尚先杨凌露张改莲杨金瑞顾江楠
Owner BEIJING NORMAL UNIVERSITY
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