Preparation method of paper reinforcing agent
A paper strengthening agent and initiator technology, applied in the field of papermaking auxiliaries, can solve the problems such as the inability to fully improve the paper strength effect, the deterioration of the performance, the storage stability, the inability to obtain the dispersion liquid, etc., and achieve easy control, reduced apparent viscosity, good fluidity
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Embodiment 1
[0028] In a four-necked flask equipped with a thermometer and a stirrer, under the protection of nitrogen, add 60.0 grams of deionized water, 10.0 grams of sodium epoxy carboxymethyl cellulose with a mass concentration of 15%, and add 18.0 grams of ammonium sulfate after fully dissolving , 0.3 grams of ethylenediaminetetraacetic acid, 10 grams of acrylamide, 3.0 grams of methacryloxyethyltrimethylammonium chloride, 1.5 grams of acrylic acid and 0.1 grams of N, N-methylenebisacrylamide, and then add 1.5 The g mass concentration is 1% potassium persulfate and 1.0 g mass concentration 1% sodium bisulfite, the temperature is raised to 55 ° C, and the reaction is carried out for 60 min to obtain the seed polymer;
[0029] Add 300.0 grams of deionized water, 40.0 grams of acrylamide, 12.0 grams of methacryloyloxyethyltrimethylammonium chloride, 6.0 grams of acrylic acid, 0.3 grams of N,N-methylene to the above polymerized seed polymer solution Bisacrylamide and 7.5g of 1% 2,2-azo-bi...
Embodiment 2
[0031] In a four-necked flask equipped with a thermometer and a stirrer, under the protection of nitrogen, add 60.0 grams of deionized water, 13.0 grams of sodium epoxy carboxymethylcellulose with a mass concentration of 15%, and add 14.5 grams of ammonium sulfate after fully dissolving , 0.2 grams of citric acid, 10 grams of acrylamide, 3.0 grams of methacryloyloxyethyltrimethylammonium chloride, 1.5 grams of acrylic acid and 0.1 grams of N, N-methylenebisacrylamide, and then add 1.5 grams of mass concentration 1% potassium persulfate and 1.0g mass concentration of 1% sodium bisulfite, heated to 50°C, and reacted for 70 minutes to obtain a seed polymer;
[0032] Add 300.0 grams of deionized water, 40.0 grams of acrylamide, 12.0 grams of methacryloyloxyethyltrimethylammonium chloride, 6.0 grams of acrylic acid, 0.3 grams of N,N-methylene to the above polymerized seed polymer solution Bisacrylamide and 7.5g of 1% 2,2-azo-bis(2-amidinopropane) hydrochloride were heated up to 75°...
Embodiment 3
[0034] In a four-necked flask equipped with a thermometer and a stirrer, under the protection of nitrogen, add 50.0 grams of deionized water, 12.0 grams of sodium epoxymethyl cellulose with a mass concentration of 15%, and add 15.0 grams of ammonium chloride after fully dissolving , 0.3 grams of ethylenediaminetetraacetic acid, 10 grams of acrylamide, 3.0 grams of dimethylaminoethyl methacrylate, 1.5 grams of itaconic acid and 0.1 grams of N, N-methylenebisacrylamide, and then add 1.5 grams of mass The concentration is 1% potassium persulfate and 1.0g mass concentration of 1% sodium bisulfite, the temperature is raised to 45°C, and the reaction is carried out for 90 minutes to obtain the seed polymer;
[0035] Add 210.0 g of deionized water, 40.0 g of acrylamide, 12.0 g of dimethylaminoethyl methacrylate, 6.0 g of itaconic acid, and 0.3 g of N,N-methylenebispropene to the above polymerized seed polymer solution Amide and 7.5g of 1% 2,2-azo-bis(2-amidinopropane) hydrochloride, ...
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