Positive image thermosensitive lithographic plate forebody and plate-making method thereof

A lithographic printing plate, printing plate technology, applied in printing, plate preparation, photosensitive materials for optomechanical equipment, etc., can solve the problems of poor wear resistance, low developing latitude, low sensitivity, etc.

Inactive Publication Date: 2011-07-06
LUCKY HUAGUANG GRAPHICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the sensitivity of the precursor of the positive thermosensitive lithographic printing plate...

Method used

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  • Positive image thermosensitive lithographic plate forebody and plate-making method thereof
  • Positive image thermosensitive lithographic plate forebody and plate-making method thereof
  • Positive image thermosensitive lithographic plate forebody and plate-making method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Synthesis of aminopropene

[0092] In a 1000ml three-necked flask, install a stirring tube, a condenser, and a dropping funnel, weigh 40g of acrylamide, add 200ml of water, add 100ml of 10% sodium hydroxide solution, add 3g of polymerization inhibitor ZJ-701, and start stirring to make The resin is completely dissolved, and the temperature is raised to 55°C, and 250ml of sodium hypochlorite aqueous solution (13%) is added dropwise, and the drop is completed within half an hour, and the reaction is continued for 1 hour, the temperature is lowered to room temperature, and hydrochloric acid is added to adjust the pH to 6, and the temperature is lowered to 5°C to precipitate 22g of amino propylene.

[0093] Equation 10:

[0094]

[0095] Synthesis of Acrylic Resin N1

[0096] In a 1000ml four-neck flask, install a top stirrer, a condenser tube, and a dropping funnel, feed nitrogen gas to eliminate oxygen in the bottle, add 400ml of ethyl cellosolve, 0.6g of dibenzoyl p...

Embodiment 2

[0115] Synthesis of 2-aminoacrylic acid

[0116] In a 1000ml three-necked flask, put on top stirring, condenser, and dropping funnel, weigh 60g of maleimide, add mixed solvent (50ml of methyl cellosolve and 150ml of water), add 100ml of 10% sodium hydroxide solution , sodium ethylate 15g, add 3g polymerization inhibitor ZJ-701, start to stir, make resin dissolve completely, begin to heat up to 55 ℃, dropwise add sodium hypochlorite aqueous solution (13%) 250ml, drip within half an hour, continue to react for 1 hour, Cool down to room temperature and add hydrochloric acid to adjust the pH to 6, extract with 200ml of dichloromethane, and distill off the dichloromethane to obtain 2-aminoacrylic acid.

[0117] formula 11

[0118]

[0119] Acrylic resin N2 was synthesized according to the synthesis method of acrylic resin N1 in Example 1, and the formulation amount of the positive-working heat-sensitive lithographic printing plate precursor was prepared according to the formula...

Embodiment 3

[0121] Acrylic resin N3 was synthesized according to the synthesis method in Example 1 and Example 2, and the formulation amount of the positive-working heat-sensitive lithographic printing plate precursor was prepared according to the formulation amount in Example 1, and the acrylic resin N1 was replaced by acrylic resin N3.

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PUM

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Abstract

The invention discloses a positive image thermosensitive lithographic plate forebody. A thermosensitive layer is coated on a supporting body with hydrophilic surfaces and comprises alkali-soluable resin, an infrared absorbent and a dissolution inhibitor, and the alkali-soluable resin contains acrylic resin with a side chain structure of -L1-L2-R, wherein one of L1 and L2 is -HN- and the other one is -CH2-; and R is any one of H, alkyl, phenyl or substituted phenyl. The positive image thermosensitive lithographic plate forebody containing the alkali-soluable resin has the advantages of high sensitivity, high developing tolerance and high wet fastness.

Description

technical field [0001] The invention relates to a heat-sensitive lithographic printing plate, in particular to a positive heat-sensitive lithographic printing plate precursor and a plate-making method suitable for computer-to-plate making. Background technique [0002] With the development of computer image processing technology, people's attention has turned to photosensitive or thermal direct plate-making systems that directly image digital imaging information through laser beams or thermal heads without using silver salt coated films. The use of large-scale semiconductor lasers or YGA lasers has the following advantages over traditional photocuring plate-making methods: high-resolution images can be obtained through short-time exposure to achieve time-saving effects; thermal direct plate-making plates used in the system can be operated under sunlight, To achieve labor-saving effect. [0003] In recent years, the technology of adding a chemically amplified photoresist to ...

Claims

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Application Information

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IPC IPC(8): B41C1/055G03F7/004
Inventor 曹雷焦红军李合成门红伟王坤冯磊杨成祥薛新琴沈希娟
Owner LUCKY HUAGUANG GRAPHICS
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