Method for preparing superabsorbent polymer (SAP) from acrylamide (AM) and maleic acid (MA)
A technology of acrylamide and water-absorbent resin, which is applied in the field of preparation of water-absorbent resin, and can solve problems such as poor temperature resistance, high price, and single raw material
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[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is further described and illustrated below through specific embodiments:
[0013] Weigh 2g of maleic acid, prepare a solution, add 25% NaOH solution to adjust the neutralization degree (N) of maleic acid to 80%; accurately weigh 8g of acrylamide and place it in a 250mL three-necked flask, add the above-mentioned maleic acid Add acid solution and stir well to make it evenly dispersed; add quantitative distilled water to make w(MA+AM)=20% (based on the mass of the system); then add 0.1% of crosslinking agent N,N'-methylbis Acrylamide solution, heated to 50 ° C, dropwise added 0.2% mass fraction of initiator ammonium persulfate-sodium bisulfite solution, continued to stir until uniformly mixed; nitrogen gas was introduced to maintain a constant temperature of 50 ° C for reaction. React for 5 hours to obtain a colorless and transparent colloid; place the colloid in a vacuum oven at 65°C to dry to consta...
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