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A photosensitive imaging composition comprising cyclohexaneamide monofunctional acrylate copolymer

A cyclohexane amide monofunctional, imaging composition technology, applied in the direction of photosensitive materials used in optomechanical equipment, etc., can solve the problems of reducing the printing resistance of the plate, insufficient dot protection, and reducing the sensitivity of the plate, achieving improved Alcohol resistance and printing resistance, inhibition of lateral dissolution rate, and effect of improving the quality of plate dots

Active Publication Date: 2020-02-21
LUCKY HUAGUANG GRAPHICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the amount is small, the imaging composition has weak solvent resistance, poor resistance to alkali developer, insufficient protection for dots, and low film retention rate during development, which not only affects image resolution and dot reproducibility, but also reduces plate quality. Durability of material
Conversely, when the amount is large, its developing ability will decrease, which will reduce the sensitivity of the plate, and it will easily cause the bottom and dirty phenomenon, and will also reduce the resolution and dot reproducibility of the image.

Method used

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  • A photosensitive imaging composition comprising cyclohexaneamide monofunctional acrylate copolymer
  • A photosensitive imaging composition comprising cyclohexaneamide monofunctional acrylate copolymer
  • A photosensitive imaging composition comprising cyclohexaneamide monofunctional acrylate copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of lithographic plates

[0037] (1) Preparation of aluminum plate base:

[0038] An aluminum plate with a thickness of 0.28mm is subjected to degreasing treatment for 40 seconds in a 7wt% sodium hydroxide aqueous solution at a temperature of 55°C. Use sine wave alternating current for electrolytic treatment, 50HZ alternating current, current 50A / dm 2 , the electrolysis time is 60 seconds, control Ra=0.3-0.6um, preferably 0.4-0.6um, Rz (H) The value is 2 to 3 μm, then at 60°C, remove slag in 50wt% sodium hydroxide aqueous solution for 10 seconds, and then at 25°C with a current density of 5A / d㎡ and a concentration of 20wt% sulfuric acid Treat in solution for 40 seconds, control oxide film = 2.5-3.5g / m 2 . Finally, at 60 °C with NaH 2 PO 4 -NaF solution is sealed for 30 seconds to obtain an aluminum base suitable for a lithographic printing plate.

[0039] (2) The photosensitive imaging composition was formulated into a heat-sensitive CTP coating soluti...

Embodiment 2

[0055] The sample preparation method is the same as in Example 1, and the content of each component in the photosensitive imaging composition is as shown in Table 4:

[0056] Table four

[0057] BTB-225 resin (Weihai Tiancheng Chemical Co., Ltd.) 0.193g PD-1646 resin (HEXION, USA) 0.579g Cyclohexaneamide monofunctional acrylate copolymer (m:n=5:1) 0.15g Infrared absorbing dye LC-01 (Honywell company) 0.02g Alkylbenzenesulfonic acid 0.04g methyl violet 0.018g

[0058] The above-mentioned photosensitive lithographic plate is installed on the plate-making machine for exposure. Use alkaline developer TPD-83 (manufactured by Lucky Huaguang Printing Technology Co., Ltd.) to develop at 25°C for 25 seconds. The sensitivity and development latitude are shown in Table 14.

Embodiment 3

[0060] The sample preparation method is the same as in Example 1, and the content of each component in the photosensitive imaging composition is as shown in Table 5:

[0061] Table five

[0062] BTB-225 resin (Weihai Tiancheng Chemical Co., Ltd.) 0.437g PD-1646 resin (HEXION, USA) 0.28 Cyclohexaneamide monofunctional acrylate copolymer (m:n=5:1) 0.20g Infrared absorbing dye LC-01 (Honywell company) 0.02g 3,4,5-Trimethoxybenzoic acid 0.04g Ethyl Violet 0.02g

[0063] The above-mentioned photosensitive lithographic plate is installed on the plate-making machine for exposure. Use alkaline developer TPD-83 (manufactured by Lucky Huaguang Printing Technology Co., Ltd.) to develop at 25°C for 30 seconds. The sensitivity and development latitude are shown in Table 14.

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Abstract

The invention discloses a photosensitive imaging composition containing a cyclohexane amide monofunctional acrylate copolymer. The photosensitive imaging composition is prepared from the cyclohexane amide monofunctional acrylate copolymer, alkali soluble film forming resin, infrared absorption dye, background dye and an acid generator. The cyclohexane amide monofunctional acrylate copolymer contained in the photosensitive imaging composition is capable of effectively increasing screentone quality of a printing plate material and increasing the developing latitude; meanwhile, the alcohol resistance of the printing plate material is increased, the plate life of the printing plate material is improved, a dissolution inhibitor in a traditional photosensitive composition is replaced, and the phenomenon of film reduction or dirty formed by too much or too less of the dissolution inhibitor in dosage can be avoided.

Description

technical field [0001] The invention relates to a photosensitive imaging composition, in particular to a photosensitive imaging composition containing cyclohexaneamide monofunctional acrylate copolymer and its application in positive thermosensitive CTP plates. Background technique [0002] The solvent-repellent compounds used in traditional positive thermal CTP plates are sulfonate esters, phosphate esters, aromatic esters, aromatic sulfonate esters, aromatic disulfones, carboxylic anhydrides, aromatic ketones, aromatic aldehydes, aromatic amines, aromatic esters , these compounds can be used alone or in combination. For example, in Japanese patent JP-A-5-158230, quaternary ammonium salt is used as the retarding solvent, and quaternary ammonium salt can be thermally decomposed and dissolved in the exposed part, while the unexposed part has an inhibitory effect on the developer. U.S. Patent No. 5,705,308 and U.S. No. 5,705,322 use diazonaphthoquinone derivatives as inhibito...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/004
Inventor 牛红雨张付潭王群英栗更新薛新琴王泳张涛张刚柴廷会冯磊
Owner LUCKY HUAGUANG GRAPHICS
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