Preparation method of super absorbent resin for sanitary material
A technology of superabsorbent resin and sanitary material, applied in the field of irradiation processing, can solve the problems of low γ-ray dose rate, influence on product performance, low reaction efficiency, etc., and achieve the effects of abundant holes, simple production operation and control, and convenient operation.
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[0038] The present invention provides a method for preparing super absorbent resin for sanitary materials, which is characterized in that it comprises the following steps:
[0039] (1) Add 20 to 80 parts by weight of polymerized monomers, 0.02 to 5 parts by weight of secondary monomers, 0.001 to 1 parts by weight of crosslinking agent, and 0.01 to 5 parts by weight of other auxiliary agents into the container to obtain the material to be polymerized. The material and liquid are mixed uniformly in a sealed plastic bag. After the gas in the plastic bag is emptied, it is placed on a tray and irradiated under an electron beam at a uniform speed. The material liquid rapidly expands into a gel, and the material liquid is placed in the plastic bag side by side The purpose of empty air is to prevent air from oxidizing polymers and affecting physical properties; in addition, if air remains in the plastic bag, the heat of radiation polymerization can rapidly expand the gas, collapse the pla...
Example Embodiment
[0047] Example 1
[0048] A preferred solution of the method for preparing super absorbent resin of the present invention includes the following steps:
[0049] (1) Put 36.3 parts of acrylic acid into the mixing tank, neutralize with 32% sodium hydroxide solution to a degree of neutralization of 75%, add 0.04 parts by weight of N,N-methylenebis(meth)acrylamide and acrylamide 3.7 parts by weight, 0.01 parts by weight of polyethylene glycol diacrylate, 0.1 parts by weight of sodium dodecylbenzene sulfonate, and 0.1 parts by weight of ethanol, and stir uniformly to obtain a polymerized liquid;
[0050] (2) Put the material liquid prepared in (1) into a PE plastic bag, and place the air in the tray. The thickness of the material liquid is below 50mm, and the tray will pass through the electron beam with a beam intensity of 10.3mA at a constant speed of 13m / min. Illuminate, make the absorbed dose of the material liquid reach 15kGy, and get the hydrogel;
[0051] (3) The gel block obtained...
Example Embodiment
[0053] Example 2
[0054] A preferred solution for the preparation method of the high-performance water-absorbing resin of the present invention includes the following steps:
[0055] (1) Put 38 parts of acrylic acid into the mixing tank, neutralize with 30% sodium hydroxide solution to a degree of neutralization of 75%, add 0.08 parts by weight of N,N-methylenebis(meth)acrylamide, 2- 2 parts by weight of acrylamide 2-alkenyl propane sulfonic acid, 0.2 parts by weight of sodium tripolyphosphate, 0.1 parts by weight of sodium dodecylbenzene sulfonate, and 0.1 parts by weight of pentane, stir evenly to obtain a material to be polymerized;
[0056] (2) Put the material liquid prepared in (1) into a PE plastic bag, and place the clean air in the tray. The thickness of the material liquid is below 50mm, and the tray will pass through the 9.3mA electron beam at a constant speed of 8 meters / min. Illuminate, make the absorbed dose of the material liquid reach 18kGy, and get the hydrogel;
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