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.
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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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