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Starch graft acrylic acid/modified verdelite high-water-absorption resin and preparing method thereof

A superabsorbent resin and starch grafting technology, which is applied in the field of superabsorbent resin and its preparation, can solve the problems of poor salt tolerance, poor thermal stability, and low water absorption rate of the product, and achieve stable reaction, good thermal stability, and water absorption rate. Improved effect

Inactive Publication Date: 2008-12-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex process, high cost, poor salt tolerance, low gel strength, low water absorption rate and poor thermal stability in the existing method of compounding inorganic minerals and starch-grafted superabsorbent resin, and provide A kind of starch-grafted acrylic acid / modified tourmaline superabsorbent resin and its preparation method

Method used

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  • Starch graft acrylic acid/modified verdelite high-water-absorption resin and preparing method thereof
  • Starch graft acrylic acid/modified verdelite high-water-absorption resin and preparing method thereof
  • Starch graft acrylic acid/modified verdelite high-water-absorption resin and preparing method thereof

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specific Embodiment approach 1

[0010] Specific embodiment 1: In this embodiment, starch-grafted acrylic acid / modified tourmaline superabsorbent resin consists of 100 parts of ethylenic monomer, 20-40 parts of starch, 0.1-2.0 parts of cross-linking agent, 0.5-2.5 20-40 parts of initiator, 20-40 parts of modified tourmaline powder and 20-40 parts of deionized water; the ethylenic monomer is acrylic acid monomer or acrylamide; the cross-linking agent is N, N-methylenebisacrylamide , epichlorohydrin or ethylene glycol diglycidyl ether; the initiator is ammonium persulfate-sodium sulfite, ammonium persulfate, ammonium persulfate-sodium bisulfite, ammonium cerium nitrate, 2,2-dimethoxyphenyl Acetophenone, benzophenone or 2,4,6-triylbenzoyl-diphenylphosphine oxide; the modified tourmaline powder is PVA modified tourmaline powder, CTAB modified tourmaline powder or stearic acid modified tourmaline powder.

specific Embodiment approach 2

[0011] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the starch-grafted acrylic acid / modified tourmaline superabsorbent resin consists of 100 parts of ethylenic monomer, 30 parts of starch, and 1.0 part of crosslinking agent according to the ratio of parts by mass. , 1.5 parts of initiator, 30 parts of modified tourmaline powder and 30 parts of deionized water. Others are the same as in the first embodiment.

[0012] All chemical reagents used in this embodiment are of analytical grade.

specific Embodiment approach 3

[0013] Embodiment 3: This embodiment differs from Embodiment 1 in that the starch comes from wheat flour, barley flour, corn flour, rice flour, cassava flour, potato flour or sweet potato flour. Others are the same as in the first embodiment.

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Abstract

The invention relates to a starch-grafted acrylic acid / modified tourmaline super absorbent polymer and a preparation method thereof, which relates to the super absorbent polymer and the preparation method thereof. The method solves the problems of complex technique, high cost, poor saline tolerance of products, low jelly strength, low water-absorption rate and poor thermal stability in the prior method for compounding inorganic mineral and the starch-grafted super absorbent polymer. The starch-grafted acrylic acid / modified tourmaline super absorbent polymer is prepared by a vinyl monomer, starch, a crosslinking agent, an initiator, modified tourmaline powder and deionized water. The method comprises the following steps: firstly, compositions required are weighed and taken; and secondly, the starch is pasted, added with the vinyl monomer and the modified tourmaline powder, and then added with the initiator and the crosslinking agent, and the starch-grafted acrylic acid / modified tourmaline super absorbent polymer is prepared after reaction, drying and crushing. The method has a simple and convenient technique and low cost; the saline tolerance of products prepared is good; the jelly strength is high; the water-absorption rate is improved by 10 percent; and the thermal stability is good at a temperature between 200 and 300 DEG C.

Description

technical field [0001] The invention relates to a superabsorbent resin and a preparation method thereof. Background technique [0002] Starch-grafted superabsorbent resins are widely used in medical and health care, agriculture, forestry, gardening, petrochemicals, daily chemicals, construction and other fields. With the development of science, starch-grafted superabsorbent resins are compounded with inorganic minerals to improve Its water absorption rate, salt resistance, water retention and gel strength and other properties have become research hotspots for expanding application fields. [0003] At present, superfine kaolin, montmorillonite or mica and other inorganic minerals are often compounded with starch-grafted superabsorbent resins by reverse-phase suspension polymerization, but there are problems of complex process and high cost, and the salt tolerance and condensation of the products Glue strength, water absorption rate and thermal stability are generally not hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F2/44C08K9/04C08K5/1515
Inventor 杨蕾滕玉洁刘艳于胜志
Owner HARBIN INST OF TECH
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