Polyacrylate super absorbent resin and preparation method thereof

Abstract

The invention relates to the technical field of an absorbent resin, in particular to a polyacrylate super absorbent resin and a preparation method thereof. According to the invention, a limited amount of alkaline materials are partially neutralized with crylic acid, radical polymerization cross-linking reaction is carried out on the partially neutralized crylic acid mixed solution under the effect of a comonomer, a cross-linking agent and a composite initiator so as to obtain a hydrogel cross-linked polymer with a unique body type net structure, and finally the hydrogel cross-linked polymer is granulated, heated and dried to prepare a high polymer-a super absorbent resin with water swelling property and water insoluble property simultaneously. When the composite initiator acts, photo-initiation primary polymerization is carried out rapidly under the effect of ultraviolet light, and then thermal-initiation deep polymerization is carried out by heat continuously generated and accumulated in the primary polymerization process, so the polymerization conversion rate of crylic acid monomers is promoted to be improved greatly, the polymerization reaction time is shortened, and the residual quantity of the monomers is reduced.

Description

technical field [0001] The invention relates to the technical field of water-absorbent resins, in particular to a polyacrylate superabsorbent resin and a preparation method thereof. Background technique [0002] Superabsorbent resin is a new type of polymer water-absorbing material, which contains a large number of hydrophilic groups and a unique body-shaped network structure, which can absorb and maintain hundreds of times its own weight in pure water or dozens of times its physiological weight in a short time. Salt water, good water retention performance; it is not easy to dehydrate even under pressure. Biochemical technology, papermaking, textiles, mining, daily necessities, cosmetics and many other aspects have extremely wide applications, so they play an increasingly important role in the national economy and people's lives, especially in recent years. Large expansion, its market prospect is very broad. [0003] At present, the synthetic cross-linked polyacrylic acid ...

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Problems solved by technology

[0007] Thermally induced polymerization is currently used by many domestic manufacturers. Some thermally induced slow polymerization takes a long time; some thermally induced rapid polymerization has a short reaction time, but the polymerization will be insufficient, the residual monomers in the product are high, and the product is easy to turn yellow. The quality stability is poor, so the control requirements of the simple thermally induced polymerization process are relatively high; moreover, in the thermally induced polymerization process, the entire material needs to be heated to a certain temperature in the initial stage, because the material liquid contains more than half of the It is all water, so the early heating process will also consume a lot of heat energy, the reaction time is relatively long, the process control requirements are high, and the product quality stability is relatively poor

[0008] In a word, the above-mentioned existing polyacrylate superabsorbent resin and its preparation method generally have shortcomings such as long reaction time, high monomer residue, poor product quality stability or large investment, and low production efficiency. subject to certain restrictions

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