Novel production method of super absorbent resin

Abstract

The invention provides a novel production method of super absorbent resin, which comprises the following steps: adding acrylic acid into a reaction kettle, and then dropwise adding sodium hydroxide for neutralization; the preparation method comprises the following steps: sequentially adding an initiator A, an initiator B and a water absorption accelerator C into a reaction kettle, uniformly mixing all the materials, adding the materials into an extruder at 70-90 DEG C, and carrying out a polymerization reaction for 1-5 minutes; extruding the rubber material subjected to the polymerization reaction into a linear shape through a head die of an extruder, and cutting the linear shape into rubber particles at a granulator at the head; in the pelletizing process, an anti-sticking agent is sprayed outside the surfaces of the colloidal particles; and drying and crushing the cut particles. The preparation method has the advantages that (1) in the polymerization reaction, the initiator A, the initiator B and the water absorption accelerant C are added, so that the reaction is more sufficient, and the reaction time is greatly shortened; (2) the gelatinous substance after the polymerization reaction is extruded into a linear adhesive tape, so that the consumed time is greatly reduced in the subsequent pelletizing operation; and (3) in the pelletizing process, an anti-sticking agent is sprayed outside the surfaces of the colloidal particles, so that the colloidal particles are effectively prevented from being adhered.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a novel production method of superabsorbent resin. Background technique [0002] Superabsorbent resin is a new type of synthetic polymer material that can absorb 500 to 1000 times its own weight of water. It has a high water absorption performance that can absorb hundreds to thousands of times its own weight. Once the superabsorbent resin absorbs water and swells to become a hydrogel, it will immediately become swollen, keeping the liquid in a stagnant state, and it is difficult to separate the liquid even if it is pressurized. Therefore, superabsorbent resins are widely used in various fields such as hygiene products, industrial and agricultural production, and civil engineering, especially in the preparation of paper diapers. [0003] At present, the production method of superabsorbent resin is: first, carry out neutralization reaction with acrylic acid and sodium hy...

AI Technical Summary

Problems solved by technology

This method mainly has the following problems: (1) the high temperature polymerization reaction time is at least 1.5h, and the time is too long, which greatly affects the production efficiency of the superabsorbent resin; (2) the gelatinous substance after the high temperature polymerization reaction is a rubber block, which will The granulation process takes longer; (3) During the extrusion granulation process, the rubber particles are easy to stick, which affects the subsequent fine crushing process