Original plate of plane printing plate
A technology of lithographic printing plate and original plate, applied in lithographic printing equipment, printing, printing technology, etc., can solve the problems of inability to improve printing resistance, pollution resistance and printing resistance
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Synthetic example 1
[0194] To synthesize the No.1 polymer, 50.4 g of p-vinylbenzoic acid (manufactured by Hokko Chemical Co., Ltd.), 15.2 g of triethyl-p-vinylbenzyl ammonium chloride, 1.9 g of Mercaptoethanol and 153.1 g of methanol were heated while stirring in a nitrogen stream, and the temperature was kept at 60°C. Add 2.8g 2,2' dimethyl azobisisobutyrate to the solution, and continue to stir for 30min while adding. Thereafter, 201.5 g of p-vinylbenzoic acid, 60.9 g of triethyl-p-vinylbenzyl ammonium chloride, 7.5 g of mercaptoethanol and 11.1 g of 2,2'-bis A solution obtained by dissolving methylazobisisobutyric acid and the like in 612.3 g of methanol. After the dropwise addition, the solution was heated to 65° C., and stirring was continued for 10 hr under nitrogen flow. After the reaction, cool to room temperature. The reaction liquid yield was 1,132 g, and its solid concentration was 30.5 wt%. In addition, the number average molecular weight (Mn) of the obtained product was obtained ...
Synthetic example 2
[0196] In order to synthesize the No.2 polymer, a similar operation to Synthesis Example 1 was carried out, except that triethylvinylbenzyl ammonium chloride of m / p (2 / 1) was used instead of triethyl-p-vinylbenzyl chloride ammonium, mercaptoethanol was replaced by ethyl mercaptopropionate. As a result, a polymer having a number average molecular weight of 4,800 was obtained.
Synthetic example 3
[0198] To synthesize polymer No. 25, 146.9 g (0.99 mol) of p-vinylbenzoic acid (manufactured by Hokko Chemical Co., Ltd.), 44.2 g (0.21 mol) of vinylbenzyltrimethyl Hydroxyl ammonium chloride and 446g of 2-methoxyethanol were heated and kept at 75°C under a nitrogen stream with stirring. Then 2.76 g (12 mmol) of dimethyl 2,2' azobisisobutyrate was added to this solution and stirring was continued. After 2 hrs, 2.76 g (12 mmol) of dimethyl 2,2' azobisisobutyrate was added thereto. After 2 hours, 2.76 g (12 mmol) of dimethyl 2,2' azobisisobutyrate was added thereto. After stirring for another 2 hr, it was cooled to room temperature. The resulting reaction liquid was poured into 12 L of ethyl acetate with stirring. The precipitated solid was taken out and dried. Its yield was 189.5 g. The molecular weight of the obtained solid was measured by a light scattering method, and the weight average molecular weight (Mw) was 32,000.
[0199] Other polymers used in the present inven...
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