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Infrared positive thermal-sensitive imaging composition

A technology of infrared thermosensitive and imaging composition, which is applied in the direction of photosensitive materials, printing, and printing plate preparation for optomechanical equipment, and can solve the problems of reducing the use function of printing plates, affecting compatibility, and low chemical resistance. Achieve high film retention, excellent chemical resistance, and high development latitude

Active Publication Date: 2010-06-30
XINGRAPHICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Low chemical resistance seriously affects the compatibility of the printing plate with the chemicals that must be used in some printing processes, thereby reducing the use function of the printing plate

Method used

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  • Infrared positive thermal-sensitive imaging composition
  • Infrared positive thermal-sensitive imaging composition

Examples

Experimental program
Comparison scheme
Effect test

example 1-7

[0138] On the obtained plate base, at 1.6g / cm 2 Coating amount Coating thermosensitive positive imaging composition: 22.52g polymer P1 (or P9, or P18, or P20, or P23, or P25, or P29, 0.71g IR830A infrared absorber, 250.00g γ-butylene Lactone / acetone / isobutyl ketone = 150 / 200 / 650 mixed solvent. The coated sample plate was dried in an oven at 120°C for 10 minutes to obtain the original plate of thermal positive CTP.

[0139] The obtained original plate was mounted on a Creo Trendsetter 800 Quantum type CTP plate-setter, using an 830nm laser, a drum rotation speed of 158rpm, and a laser power of 8W for scanning exposure. The exposed plate was developed with XingraphicsDV-F3 developer (from Chengdu Xintu Printing Technology Co., Ltd.) for 40 seconds at 25°C, and all the exposed parts of the original plate were completely dissolved, while the non-exposed parts were not dissolved. The image of the developed plate is clear, with sharp and neat edges.

example 8-14

[0144] Except that the 0.7g IR830A infrared absorber in Example 1-7 was changed to 1.01g of 3-10 μm carbon black, other operations were unchanged, and the results similar to Example 1-7 were obtained.

example 15-22

[0149] On the obtained plate base, at 1.6g / cm 2 The amount of coating coating thermosensitive positive imaging composition: 19.80g polymer P18, 0.55g IR830A infrared absorber, 0.40g MCF312 surfactant, 0.15g F-176 surfactant, 1.00g crystal violet lactone , 0.75g of phthalic anhydride was dissolved in 250g of γ-butyrolactone / acetone / isobutyl ketone=150 / 200 / 650 mixed solvent. The coated sample plate was dried in an oven at 120°C for 10 minutes to obtain the original plate of thermal positive CTP.

[0150] The obtained original plate was mounted on a Creo Trendsetter 800 Quantum type CTP plate-setter, and an 830nm laser was used with a drum rotation speed of 158rpm for scanning exposure. The exposed plate was developed at 25°C with Xingraphics DV-F3 developer.

[0151] Replace P1 in the example with P10, P18, P21, P23, P24, P28, and P29, and keep the other components unchanged. Measure the exposure energy when clear images are obtained without bottom dirt, and the following data...

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PUM

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Abstract

The invention discloses an infrared thermal-sensitive imaging composition, which comprises macromolecule resin with self-dissolution-resistant characteristic, and an infrared absorbent. The macromolecule resin with self-dissolution-resistant characteristic is of alkali soluble resin simultaneously containing phenolic hydroxyl and carbamate or thio carbamate strong electron withdrawing groups. Thegreatest characteristic of the invention is that an infrared positive thermal-sensitive CTP plate can be prepared without a dissolution inhibitor. The mechanism of the invention can be considered butnot limited to: the carbamate or the thio carbamate strong electron withdrawing groups in the resin plays a dissolution resistant role in the phenolic hydroxyl in the resin, thereby reducing the alkaline solubility of the resin. When the plate is scanned by infrared laser, the infrared radiation is converted into heat energy. The dissolution resistant role of the carbamate or the thio carbamate strong electron withdrawing groups in the resin in the phenolic hydroxyl in the resin is damaged at a high temperature, so the alkaline solubility of the resin in an alkaline solution is restored.

Description

technical field [0001] The invention belongs to the field of photothermal functional materials, and relates to an imaging composition for manufacturing infrared positive thermosensitive CTP (computer-to-plate) printing plates. Background technique [0002] Photosensitive photosensitive compositions and imaging elements have been widely used in printed circuit boards (PCBs) and lithographic printing plates, and a typical method is to coat these photosensitive materials on a substrate, then dry and / or cure them to make them Form a thin film. When irradiated with an appropriate radiation source or particle beam, the film that is irradiated to the extent may have different properties than the film that is not irradiated. In some cases the irradiated film undergoes a physical change that can be easily removed or melted compared to a film that is not irradiated; in other cases the irradiated film undergoes a chemical change that either More or less soluble in the appropriate liq...

Claims

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Application Information

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IPC IPC(8): G03F7/004B41C1/10
Inventor 黎仕友杜碧林袁宏伟于义松
Owner XINGRAPHICS CO LTD
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