Surface sizing agent for electrostatic duplicating paper and preparation method and applications thereof
A technology of surface sizing agent and copy paper, which is applied in the direction of water repellent addition, etc., can solve the problems of little improvement in the surface strength of electrostatic copy paper, unstable paper quality, and poor paper strength, so as to improve printing adaptability, Effect of improving Cobb value and speeding up curing speed
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Embodiment 1
[0039] 1. Preparation of surface sizing agent base material for electrostatic copy paper:
[0040] In a 1000ml four-necked flask equipped with a condenser, a dropping device, a stirrer and a thermometer, add 20 grams of gelatin with a molecular weight of 10000 g / mol and 214.5 grams of deionized water, heat up to 85°C to dissolve, then cool down to 45°C. Add 2 grams of 25wt% octadecyl polyoxyethylene (15) trimethylammonium chloride aqueous solution, heat to 95 ° C, add 1.5 grams of 20wt% ammonium persulfate aqueous solution, drop the following mixed monomers: 100 grams of styrene, 3 grams of dimethylaminoethyl acrylate monochloromethane quaternary ammonium, 1 gram of diacetone acrylamide, and 20 grams of n-butyl acrylate were added in 1 hour. The reaction was maintained at 95°C for 1 hour, cooled to 35°C, pH = 2.0. After filtering through a 100-mesh filter screen, the surface sizing agent base material for electrostatic copy paper was obtained, with a solid content of 39.9 wt%...
Embodiment 2
[0046] 1. Preparation of surface sizing agent base material for electrostatic copy paper:
[0047] Add 50 grams of gelatin with a molecular weight of 100,000 g / mol and 808 grams of deionized water into a 2000ml four-neck flask equipped with a condenser, a dropping device, a stirrer, and a thermometer, heat up to 85°C to dissolve, and cool down to 45°C. Add 20 grams of 10wt% lauryl polyoxyethylene (20) trimethylammonium chloride aqueous solution, add 4 grams of 50wt% potassium persulfate aqueous solution, and drop the following mixed monomers: 100 grams of methyl styrene, methacrylic acid 8 grams of acyloxyethyltrimethylammonium chloride, 5 grams of diacetone acrylamide, and 40 grams of isooctyl methacrylate were added in 6 hours. The reaction was maintained at 40°C for 2 hours, cooled to 25°C, pH=5.85. Filter through a 100-mesh filter to obtain a surface sizing agent base material for electrostatic copy paper, with a solid content of 20.1 wt%.
[0048] 2. Preparation of addi...
Embodiment 3
[0053]1. Preparation of surface sizing agent base material for electrostatic copy paper:
[0054] In a 1000ml four-neck flask equipped with a condenser, a dropping device, a stirrer and a thermometer, add 35 grams of gelatin with a molecular weight of 80000g / mol and 395.3 grams of distilled water, and heat up to 85°C to dissolve. Cool down to 45°C. Add 10 grams of 10 wt% tetradecyl polyoxyethylene (8) trimethylammonium chloride aqueous solution, heat to 60 ° C, add 5 grams of 20 wt % sodium persulfate aqueous solution, and drop the following mixed monomers: 100 grams of styrene, 5 grams of diallyl dimethyl ammonium chloride, 3 grams of diacetone acrylamide, and 30 grams of methyl methacrylate were added in 4 hours. The reaction was maintained at 60°C for 2 hours, cooled to 35°C, pH = 3.5. Filter through a 100-mesh filter to obtain a surface sizing agent base material for electrostatic copy paper, with a solid content of 30.2 wt%.
[0055] 2. Preparation of additives:
[00...
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