Reinforcing agent of amphoteric polyacrylamide cardboard paper
A technology of polyacrylamide and cardboard paper, applied in the direction of reinforcing agent addition, paper, papermaking, etc., can solve problems such as production operation and environmental pollution, volatile acrylonitrile, high toxicity, etc., to improve safety and environmental protection, improve reinforcement effect, the effect of increasing the degree of branching
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Embodiment 1
[0020] Put 1240kg of deionized water into the reactor, add 170.27kg of acrylamide, 25.18kg of methacryloyloxyethyltrimethylammonium chloride, and 12.59kg of acryloyloxyethyltrimethylammonium chloride in sequence under stirring , 1.00kg of acrylic acid, 6.79kg of 2-acrylamido-2-methylpropanesulfonic acid, 14.32kg of methyl acrylate, 0.2136kg of pentaerythritol, adjust the pH value of the system to 3.5 with sodium carbonate solution, and flush out the mixed solution with nitrogen gas Dissolved oxygen, and heated to raise the temperature of the system to 70-80°C, add 67.68kg of 1% potassium persulfate solution dropwise to the reaction kettle, and the dropwise addition is completed within 1h, then raise the temperature of the reaction system to 90°C, keep it warm Cool down after 3 hours of reaction. A papermaking reinforcing agent with a viscosity of 5579CP was obtained.
Embodiment 2
[0022] Put 881.4kg of deionized water into the reaction kettle, add 144.0kg of acrylamide, 3.9kg of N-vinylpyrrolidone, 5.4kg of methacryloyloxyethyltrimethylammonium chloride, acryloyloxyethyl Trimethylammonium chloride 3.2kg, itaconic acid 0.52kg, 2-acrylamido-2-methylpropanesulfonic acid 1.20kg, methyl methacrylate 13.3kg, triethanolamine 0.298kg, adjusted with sodium phosphate solution When the pH value of the system is 4.0, nitrogen gas is introduced to take out the dissolved oxygen in the mixed liquid, and the temperature of the system rises to 70-80°C when heated, and 54 kg of 1% potassium persulfate solution is added dropwise to the reaction kettle, and the dropwise addition is completed within 1 hour , then raise the temperature of the reaction system to 90°C, and then lower the temperature after 3 hours of reaction. A papermaking strengthening agent with a viscosity of 6541CP was obtained.
Embodiment 3
[0024] Put 1031.5kg of deionized water into the reaction kettle, add acrylamide 108kg, methacryloxyethyltrimethylammonium chloride 39.9kg, acryloyloxyethyltrimethylammonium chloride 18.6kg , 2.7kg of acrylic acid, 7.77kg of 2-acrylamide 2-methylpropanesulfonic acid, 8.4kg of butyl acrylate, 0.261kg of sodium bisulfite, adjust the pH value of the system to 4.5 with sodium acetate solution, and take out the mixed solution to dissolve Oxygen, and when heating, the system temperature rises to 30°C, and 67.68 kg of 1% potassium persulfate solution is added dropwise to the reactor, and the dropwise addition is completed within 1 hour, and the temperature is lowered after 4 hours of reaction. Obtain the papermaking strengthening agent of viscosity 4859CP.
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