Surface sizing agent for corrugated paper as well as preparation method and application thereof
A surface sizing agent and corrugated paper technology, applied in the direction of water repellent addition, etc., can solve the problems of large amount of sizing agent, difficult to improve the grade, poor paper strength, etc., to improve the surface ring compressive strength, improve the Cobb value, The effect of accelerating the ripening speed
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[0042] Example 1
[0043] 1. Preparation of surface sizing agent base material for corrugated paper:
[0044] In a 1000ml four-necked flask equipped with a condenser, a dripping device, a stirrer and a thermometer, add 20 grams of gelatin with a molecular weight of 10000g / mol and 214.5 grams of deionized water. The temperature is raised to 85°C to dissolve, and the temperature is lowered to 45°C. Add 2 g of 25wt% octadecyl polyoxyethylene (15) trimethylammonium chloride aqueous solution, heat to 95°C, add 1.5 g of 20wt% ammonium persulfate aqueous solution, and add dropwise the following mixed monomers: 100 g of styrene, 3 grams of dimethylaminoethyl acrylate monochloromethane quaternary ammonium, 1 gram of N-butoxymethacrylic acid, and 20 grams of n-butyl acrylate. The addition is completed in 1 hour. The reaction was maintained at 95°C for 1 hour, cooled to 35°C, and pH=2.0. It was filtered through a 100-mesh filter to obtain a surface sizing agent b...
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[0051] Example 2
[0052] 1. Preparation of surface sizing agent base material for corrugated paper:
[0053] In a 2000ml four-necked flask equipped with a condenser, a dripping device, a stirrer and a thermometer, add 50 grams of gelatin with a molecular weight of 100000 g / mol and 808 grams of deionized water. The temperature is raised to 85°C to dissolve, and the temperature is reduced to 45°C. Add 20g of 10wt% dodecylpolyoxyethylene (20) trimethylammonium chloride aqueous solution, 4g of 50wt% potassium persulfate aqueous solution, and drop the following mixed monomers: 100g methyl styrene, methacrylic acid 8 grams of acyloxyethyl trimethyl ammonium chloride, 5 grams of divinylbenzene, 40 grams of isooctyl methacrylate, the addition is completed in 6 hours. The reaction was maintained at 40°C for 2 hours, then cooled to 25°C, pH=5.85. Filtered through a 100-mesh filter to obtain a surface sizing agent base material for corrugated paper with a solid ...
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[0060] Example 3
[0061] 1. Preparation of surface sizing agent base material for corrugated paper:
[0062] In a 1000ml four-necked flask equipped with a condenser, a dripping device, a stirrer and a thermometer, 35 grams of gelatin with a molecular weight of 80,000 g / mol and 395.3 grams of distilled water were added, and the temperature was raised to 85°C to dissolve. Cool down to 45°C. Add 10g of 10wt% tetradecyl polyoxyethylene (8) trimethylammonium chloride aqueous solution, heat to 60°C, add 5g of 20wt% sodium persulfate aqueous solution, drop the following mixed monomers: 100g styrene, 5 grams of diallyl dimethyl ammonium chloride, 3 grams of amino ethyl acrylate, and 30 grams of methyl methacrylate. Add up in 4 hours. The reaction was maintained at 60°C for 2 hours, cooled to 35°C, and pH=3.5. It is filtered through a 100-mesh filter to obtain a surface sizing agent base material for corrugated paper with a solid content of 30.2 wt%.
[0063] ...
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