Method for preparing high hydroscopicity resin by adding water-adsorbing resin for capturing polyvalent metal ion to unsaturated monomer water solution
A technology of multivalent metal ions and superabsorbent resins, applied in absorbent pads, medical science, bandages, etc., can solve problems such as unfavorable polymerization reactions and high total metal ions content, and achieve low metal ion content, high retention, and reduced The effect of the total content of metal ions
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reference example 1
[0059] step:
[0060] 1) Take 72.9g of 48% sodium hydroxide aqueous solution and slowly add 45g of acrylic acid and 97.2g of water into a 500cc conical flask, then add 45g of acrylamide dropwise into the above solution for 3 hours, and keep the temperature of the neutralization reaction system at 20 °C to 40 °C; at this time, a water-soluble unsaturated monomer concentration of 42wt% (weight percent) aqueous solution is obtained, wherein 69.5mol% (molar ratio) of acrylic acid or acrylamide is partially neutralized into sodium acrylate or sodium acrylamide.
[0061] 2) Add 0.138g of N,N'-methylenebisacrylamide in the water-soluble unsaturated monomer solution, and maintain the temperature at about 20°C.
[0062] 4) Add 0.048g hydrogen peroxide, 0.6g sodium bisulfite and 0.6g ammonium persulfate to start the reaction.
[0063] 5) Cutting the reacted superabsorbent resin with a cutting mill, and screening out the superabsorbent resin whose particle size is less than 2mm (millime...
reference example 2
[0066] step:
[0067] 1) Take 72.9g of 48% sodium hydroxide aqueous solution and slowly add 45g of acrylic acid and 97.2g of water into a 500cc conical flask, then add 45g of acrylamide dropwise into the above solution for 3 hours, and keep the temperature of the neutralization reaction system at 20 °C to 40 °C; at this time, an aqueous solution with a water-soluble unsaturated monomer concentration of 42 wt% is obtained, in which 69.5 mol% (molar ratio) of acrylic acid or acrylamide is partially neutralized into sodium acrylate or sodium acrylamide.
[0068] 2) Add 0.162g of polyethylene glycol diglycidyl ether in the water-soluble unsaturated monomer solution, and maintain the temperature at about 20°C.
[0069] 4) Add 0.048g hydrogen peroxide, 0.6g sodium bisulfite and 0.6g ammonium persulfate to start the reaction.
[0070] 5) Cutting the reacted superabsorbent resin with a cutting mill, and screening out the superabsorbent resin whose particle size is less than 2 mm in d...
reference example 3
[0073] step:
[0074] 1) Take 72.9g of 48% sodium hydroxide aqueous solution and slowly add 45g of acrylic acid and 97.2g of water into a 500cc conical flask, then add 45g of acrylamide dropwise into the above solution for 3 hours, and keep the temperature of the neutralization reaction system at 20 °C to 40 °C; at this time, an aqueous solution with a water-soluble unsaturated monomer concentration of 42 wt% is obtained, in which 69.5 mol% (molar ratio) of acrylic acid or acrylamide is partially neutralized into sodium acrylate or sodium acrylamide.
[0075] 2) Add 0.971g of propylene acrylate in the water-soluble unsaturated monomer solution, and keep the temperature at about 20°C.
[0076] 4) Add 0.048g hydrogen peroxide, 0.6g sodium bisulfite and 0.6g ammonium persulfate to start the reaction.
[0077] 5) Cutting the reacted superabsorbent resin with a cutting mill, and screening out the superabsorbent resin whose particle size is less than 2 mm in diameter.
[0078] 6) ...
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