Preparation method of salt-resistant acrylic superabsorbent resin

Abstract

The invention discloses a preparation method of salt-resistant acrylic superabsorbent resin. The salt-resistant acrylic superabsorbent resin is prepared from the following raw materials in parts by weight: deionized water 100 parts, sodium hydroxide 33 parts, acrylic acid 63 parts, acrylamide 27 parts, ethylene glycol diglycidyl ether 5 parts, potassium persulfate 0.2 part, and ascorbic acid 0.05 part. The preparation process includes the following steps: (1) dissolving sodium hydroxide in deionized water, adding to acrylic acid for neutralizing to a neutralization degree of 75-85%, adding acrylamide, and stirring to dissolve; (2) adding ethylene glycol diglycidyl ether as a crosslinking agent, to the neutralization liquid, introducing nitrogen gas, adding potassium persulfate and ascorbic acid solutions in turn to initiate a polymerization reaction, keeping the temperature for 60-120min, carrying out extrusion granulation of the polymer, drying at 130-160 DEG C, pulverizing, and sieving to obtain granular resin; and (3) mixing the granular resin with aluminum sulfate powder, silica, ascorbic acid, sodium bisulfite, hydroquinone solution, while spraying ethanol, methanol and the self-made crosslinking agent for rapid surface treatment, drying at 140-160 DEG C, and sieving to obtain the superabsorbent resin product which is suitable for sanitary napkins, diapers and other health supplies materials.

Description

technical field [0001] The invention relates to a new type of functional polymer material, and relates to a special water-absorbing material in the field of sanitary products, especially suitable for sanitary products such as diapers and sanitary napkins, which require high resin liquid permeability, and specifically relates to a salt-resistant acrylic The preparation method of superabsorbent resin. Background technique [0002] Water-absorbent resin is a new type of functional polymer material. Water-absorbent resin is a water-swellable non-water-soluble polymer gelling agent, which has high water absorption function and excellent water retention performance. Once it absorbs water and swells into a hydrogel, it is difficult to separate the water even if it is pressurized. It is mainly used in disposable applications as absorbent materials such as paper diapers and sanitary napkins, and further as water retention agents for agriculture, forestry and gardening, and industria...

AI Technical Summary

Problems solved by technology

[0004] The existing superabsorbent resin still has serious defects and cannot meet the basic requirements of high liquid absorption rate, fast absorption speed, non-adhesive surface, and ability to keep dry for a long time after absorbing body fluids. Three-dimensional network density is used to improve the liquid flow rate and dryness of superabsorbent resin, but it usually reduces the water absorption ratio of superabsorbent resin, and there are also ways to increase the amount of resin to reduce or eliminate the discomfort caused by rewet of superabsorbent resin However, this will inevitably lead to an increase in production costs and a decrease in the stability of sanitary products