Water-soluble polymer composition, production method for water-soluble polymer composition, and application for water-soluble polymer composition
A technology of water-soluble polymers and compositions, applied in chemical instruments and methods, sustainable manufacturing/processing, dissolution, etc., can solve problems such as pipe blockage, increase in water intake and discharge, and decrease in cooling efficiency, so as to avoid Foaming, excellent effect, excellent dispersion stability
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[0115] Example 1
[0116]
[0117] Into a flask equipped with a stirrer and a capacitor, 650 g of water and 17 g of a 30% sodium hypophosphite aqueous solution were charged and maintained at 80°C. A liquid obtained by mixing 1025 g of an 80% acrylic acid aqueous solution (hereinafter also referred to as "80% AA") and 180 g of tert-butylacrylamide (hereinafter also referred to as "TBAM") into the flask was continuously supplied to the flask over 4 hours. , And 83 g of a 30% sodium hypophosphite aqueous solution and 83 g of a 30% sodium persulfate aqueous solution for polymerization reaction. After the supply was completed, the reaction liquid was kept at 80°C for a further 1 hour to react. The reaction solution was kept at 80°C, and 48% sodium hydroxide aqueous solution and deionized water were supplied to obtain an aqueous solution containing the water-soluble polymer E1 with a solid content concentration of 40% and a pH of 3.0 (water-soluble polymer composition E1) .
[0118] T...
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[0129] Examples 2 to 11 and Comparative Examples 1 to 4
[0130] Except for setting the types of raw materials and their amounts used during polymerization as shown in Tables 1 and 2, the same operations as in Example 1 were performed to obtain water-soluble polymer compositions E2 to E11 and C1 with a solid content concentration of 40%. ~C4. In the same manner as in Example 1, the weight average molecular weight of each polymer, the pH of a 40% aqueous solution, and the evaluation as a scale inhibitor and dispersant were performed. The results are shown in Tables 1 and 2.
[0131] [Table 1]
[0132]
[0133] [Table 2]
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[0135] The details of the compounds shown in Table 1 and Table 2 are as follows.
[0136] 30% NHP: 30% sodium hypophosphite aqueous solution
[0137] 30%Na 2 HPO 3 :30% aqueous solution of disodium hydrogen phosphite pentahydrate
[0138] 48% NaOH: 48% sodium hydroxide aqueous solution
[0139] 80%AA: 80% acrylic acid aqueous solution
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