A multi-coated infrared radiation sensitive positive-working lithographic printing plate precursor and method of forming an image
A lithographic printing plate, infrared radiation technology, applied in the photoplate making process of the pattern surface, photosensitive materials for opto-mechanical equipment, instruments, etc. Effects of photosensitive speed, extended service life, excellent resistance
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Embodiment 1
[0087] Synthesis Example 1 Synthesis of polymer binder PB-1:
[0088]Add 8.0 g maleimide, 6.0 g p-hydroxyphenyl acrylamide and 110 g ethylene glycol monomethyl ether to a dropping funnel equipped with heating mantle, temperature controller, mechanical stirrer, condenser, constant pressure and nitrogen inlet and outlet in a 250ml multi-neck round bottom flask. The constant pressure dropping funnel was filled with a mixed solution of 0.4 g of AIBN dissolved in 10 g of ethylene glycol monomethyl ether, 10.0 g of methyl methacrylate, 4.0 g of styrene, and 12 g of acrylonitrile. Heat the mixture in the flask to 65 under nitrogen o C, and began to drop the monomer mixture in the constant pressure funnel into the flask, the addition was completed in about 30 minutes, and the stirring reaction was continued at this temperature for 5 hours. Add 0.2 g AIBN, continue under nitrogen protection and 70 o The reaction was stirred at C for 15 hours. After cooling, the reaction mixture was...
Embodiment 2
[0089] Synthesis Example 2 Synthesis of Polymer Binder PB-2:
[0090] 4.0 g maleimide, 6.0 g acrylonitrile, 7.0 g ethyl methacrylate, 3 g N-phenylmethacrylamide, 0.2 g AIBN, and 60 g ethylene glycol monomethyl ether were added to a heated jacket, temperature controller, mechanical stirrer, condenser and nitrogen inlet and outlet in a 250ml four-neck round bottom flask. The reaction mixture was heated to 65 under nitrogen o C, then the reaction was stirred at this temperature for 5 hours. Add 0.1 g AIBN, continue under nitrogen protection and 70 o The reaction was stirred at C for 15 hours. After cooling, the reaction mixture was added dropwise to 400 g of stirring methanol (with 2 drops of concentrated hydrochloric acid). The precipitated solid was collected by suction filtration, and then placed in 250 g of cold water and stirred for 15 minutes. It was collected by suction filtration, spread out on filter paper to dry overnight, and finally dried in a 45-degree oven. Yi...
Embodiment 3
[0091] Synthesis Example 3 Synthesis of Polymer Binder PB-3:
[0092] Combine 4.0 g maleimide, 6.0 g acrylonitrile, 4.0 g butyl methacrylate, 2.0 g N,N-dimethylacrylamide, 4.0 g vinyl caprolactam, 0.2 g AIBN and 60 g N,N - Dimethylacetamide was added to a 250 ml four neck round bottom flask equipped with heating mantle, temperature controller, mechanical stirrer, condenser and nitrogen inlet and outlet. The reaction mixture was heated to 65 under nitrogen o C, then the reaction was stirred at this temperature for 5 hours. Add 0.1 g AIBN, continue under nitrogen protection and 70 o The reaction was stirred at C for 15 hours. After cooling, the reaction mixture was added dropwise to 400 g of stirring methanol (with 2 drops of concentrated hydrochloric acid). The precipitated solid was collected by suction filtration, and then placed in 250 g of cold water and stirred for 15 minutes. It was collected by suction filtration, spread out on filter paper to dry overnight, and fin...
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