Paper Strengthening Agent, Manufacturing Method For The Same, And Paper
A paper strength enhancer, amphoteric technology, applied in the direction of enhancer addition, etc., can solve the problems of polluted paper strength, drop, insufficient effect, etc., and achieve the effect of small texture disorder, excellent compressive strength, and excellent paper strength enhancement effect.
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Embodiment 1
[0094] Add 276.2 parts of ion-exchanged water to a reaction vessel equipped with a stirrer, a thermometer, a reflux cooling pipe, a nitrogen gas introduction pipe, and three dropping funnels (hereinafter referred to as funnel 1, funnel 2, and funnel 3 in turn.) Nitrogen gas was directly blown into the exchanged water to remove oxygen in the reaction container, and then the temperature of the ion-exchanged water was set to 90°C.
[0095] Next, 60 parts of benzyl chloride quaternary salt containing 18.6 parts of acrylamide, 39.5 parts of dimethylaminoethyl methacrylate and dimethylaminoethyl methacrylate as the monomer mixture (I) were further mixed with sulfuric acid. 23.8 parts of aqueous solution, 2.0 parts of itaconic acid, 0.3 parts of N,N-dimethylacrylamide, 0.3 parts of methylenebisacrylamide, 3.2 parts of sodium methallylsulfonate, 19.3 parts of 62.5% sulfuric acid and ion An aqueous solution of 117.0 parts of water was exchanged to adjust to pH 4.5, and the resulting mi...
Embodiment 2~8
[0101] Except for changing the monomer mixture (I) and the monomer mixture (II) to the composition shown in Table 1, the aqueous solution of the amphoteric polyacrylamide used in Examples 2 to 8 was obtained by the same method as in Example 1. (The solid content concentration is 20.3%).
Embodiment 9
[0103] 276.2 parts of ion-exchanged water was added to the same reaction vessel as in Example 1, oxygen in the reaction vessel was removed by blowing nitrogen gas directly into the ion-exchanged water, and the temperature of the ion-exchanged water was then set to 90°C.
[0104]Next, the monomer mixture (II) (pH 4.5 aqueous solution) having the composition shown in Table 1 was added to the funnel 1, and the mixture (I) (aqueous solution) having the composition shown in Table 1 was further added to the funnel 2.
[0105] Next, an initiator solution containing 0.6 parts of ammonium persulfate and 180 parts of ion-exchanged water was charged into the funnel 3 .
[0106] Next, the cocks of funnel 1 and funnel 3 were opened simultaneously, and the entire amount of the monomer mixture (II) and half of the initiator solution were added dropwise over 2 hours. Then, the cock of the funnel 2 was immediately opened, and the entire amount of the monomer mixture (I) and the remaining half ...
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