Organic silicone modified high water absorption resin and preparation method thereof

A technology of super absorbent resin and organosilicon, applied in the field of organosilicon modified super absorbent resin and its preparation, super absorbent resin and its preparation field, can solve the problems of hindering the penetration of water molecules and decreasing the water absorption rate, and achieve its own Effects of increased strength, low cohesive energy, and high bond energy

Inactive Publication Date: 2007-03-07
安徽省农业科学院原子能农业应用研究所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After modification, the water resistance of the polymer film is enhanced, but the water absorption rate is reduced, because the Si-O-Si chain in the polymer has hygroscopicity, and in addition, the alkoxy group in the silicon-oxygen chain is hydrolyzed to produce an active -Si(OH) group that will condense to produce There are more cross-linking points, which hinder the penetration of water molecules ("Polymer Materials Science and Engineering" Vol.19 No.1 Gong Xingyu et al. "γ-methacryloxypropyl trimethoxysilane modified acrylate Research on "Organosilicon Materials" Vol.17 No.1 Fan Deqin et al. "Research on Vinyl Triethoxysilane / Acrylate Copolymer Emulsion")

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] (1), preparation of oligosiloxane

[0013] Weigh the required amount of organosiloxane, dissolve it in dilute acetic acid solution with a concentration of 0.1-3wt%, and control the concentration of organosiloxane to 0.1-5%. The clear and transparent oligosiloxane aqueous solution is used for polymerization. If the solution is cloudy, it should not be used. The acid used is preferably a dilute solution of AA or AMPS.

[0014] (two), the preparation of organosilicon modified superabsorbent resin

[0015] Non-limiting examples are described as follows:

[0016] Aqueous Chemical Polymerization

[0017] 1. Take AA and partially neutralize it with alkali, the neutralization degree is 70-90%, add an aqueous solution of oligosiloxane to the monomer solution, control the amount of organosiloxane to 0.1wt% of AA, and adjust the monomer with water The total concentration is deoxidized by passing nitrogen under stirring, and then adding 0.05-0.25% initiator potassium persulfate...

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Abstract

The invention discloses an organic silicane high-adsorbing resin, which is copolymerized by soluble polycondensation product and vinyl monomer free radical with the content of organic silica as 0.1-5wt% as vinyl monomer, wherein the organic silicane is represented through Y (CH2) nSiX3 (Y is vinyl, epoxy radical, mercapto radical and so on; X is methoxyl, ethyoxyl, isopropoxy and so on); the resin adsorbs deionized water and salt water, which displays optical, heat and ultraviolet stability in the agricultural and hygiene domain.

Description

1. Technical field [0001] The invention relates to a functional polymer material and a preparation method thereof, in particular to a superabsorbent resin and a preparation method thereof, specifically an organosilicon-modified superabsorbent resin and a preparation method thereof. 2. Background technology [0002] Superabsorbent (SAP) is a functional polymer material, its essence is a lightly cross-linked body-shaped polymer with a spatial network structure, there are many hydrophilic groups on the molecular chain, it is insoluble in water and Organic solvent, but it absorbs water and swells when it meets water, and the absorbed water is not easy to be squeezed out when it is under pressure. It has the advantages of polymer materials, and has unique high water absorption performance and strong water retention capacity. In the industrialized SAP, the synthetic system dominates, and there are many types of synthetic SAP, mainly including acrylic acid, acrylonitrile, acrylamid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/04C08F220/56C08F2/44
Inventor 李布青杨剑波郭肖颖吴李君余增亮
Owner 安徽省农业科学院原子能农业应用研究所
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