Preparation method of rapid absorption type super absorbent resin

Abstract

The invention relates to a preparation method of rapid absorption type super absorbent resin. The preparation method comprises the following steps: adding acrylic acid, quantitative water and alkali liquor into a reaction still for carrying out neutral reaction and respectively adding a crosslinking agent, a foaming agent, wood fibers and polyethylene glycol; then adding resin powder crushed and sieved to be greater than 100 meshes, an initiator and a reducing agent, and forming foam colloid through polymerization; chopping, granulating, drying, crushing and screening and carrying out surfacecrosslinking treatment to obtain the rapid absorption type super absorbent resin. According to the preparation method disclosed by the invention, the foaming effect is improved by introducing a compound foaming agent; the water retention and permeability are improved by adding the wood fibers; the stability and gel strength of the colloidal foam are improved by adding the polyethylene glycol and the resin powder; special equipment does not need to be added in the production process; meanwhile, the generation of by-products is reduced, as well as the absorption rate and water retention of the product are effectively improved; the performance index is relatively balanced, the drying time is shortened, the production efficiency is improved, and the scale-up production is facilitated.

Description

technical field [0001] The invention relates to a preparation method of a superabsorbent resin, in particular to a preparation method of a fast-absorbing superabsorbent resin. Background technique [0002] Super absorbent polymer SAP is a general term for high molecular polymers with good liquid absorption and water retention properties. Because it has the ability to absorb hundreds or even thousands of times its own weight, it can absorb dozens of times times or even hundreds of times of normal saline (0.9% sodium chloride), and high water retention, so it is widely used. With the development of society and the improvement of people's living standards, experts and scholars at home and abroad have done a lot of research and development on the synthesis and application of superabsorbent resins. Water-retaining agents, humidity-regulating agents, fertilizer corrosion inhibitors, etc., especially acrylate superabsorbent resins have been widely used and developed in the field o...

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Problems solved by technology

[0004] At present, aqueous solution polymerization is generally used in the industry to produce superabsorbent resins, mainly cross-linked polyacrylates. There are products with unbalanced water absorption performance and fast water absorption rate, low absorption and poor water retention. There are many in the field of superabsorbent resins. Experts and scholars have made great contributions to the production of products with excellent performance, so there are many methods for improving the performance of superabsorbent resins, such as designing the structure of superabsorbent resins, introducing carbonates or bicarbonates Forming foaming holes, etc., but for the poor water retention of the product, unstable performance, and certain difficulties in scale-up production, the method of introducing sodium polyvinyl alcohol sulfonate to form an interpenetrating network structure in the superabsorbent resin can solve the problem of improving the water-absorbent resin. However, due to the complex synthesis process of the introduced substance sodium polyvinyl alcohol sulfonate, it is difficult to scale up production, so these methods are not conducive to industrial production

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