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Method of synthesizing high-hydroscopicity resin with expired gun progellant

A technology of super absorbent resin and propellant, which is applied in the field of preparation of super absorbent materials, can solve the problems of decreased stability of propellant, explosion, fire, and high heat of combustion, achieves good economic and environmental benefits, is easy to control, Efficient effect

Inactive Publication Date: 2004-08-04
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability of expired propellant will be greatly reduced, and it is flammable and has a high heat of combustion. Therefore, if it is not properly disposed of, it will become a hidden danger of explosion and fire.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Soak an expired double-base drug column (1.9g in weight) in a reaction bottle with 30mL of acetone to form a paste, add 13.5g of acrylic acid, 13mL of water, and 5g of solid sodium hydroxide to neutralize to pH ≈ 7. The acrylic acid solution was added into the reaction bottle containing the swelling slurry under constant stirring, and the stirring was continued until a stable emulsion was formed. Add 0.03g sodium bisulfite (NaHSO 3 ) and 6 drops (about 0.03g) of 30% hydrogen peroxide (H 2 o 2 ), and then dissolved 4 drops (about 0.02g) of epichlorohydrin in 1.5mL ethanol, added to the reactant, stirred evenly and passed nitrogen protection, kept the temperature at 40°C for half an hour, then adjusted the temperature to 75°C and stood for polymerization. Two hours later, the material is discharged and dried, and dried at 120° C. for more than two hours to obtain a superabsorbent resin. The water absorption rate of the product is 450g / g, and the absorption rate of 1% s...

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Abstract

The process of synthesizing high-hydroscopicity resin with expired gun propellant includes the steps of: diluting sodium acrylate with water; swelling waste collodion cotton with acetone into dilute paste; mixing the swelling waste expired gun propellant and diluted sodium acrylate; adding ethanol solution of hydrogen peroxide, sodium hydrogen sulfite, epoxy chloropropane; raising to 35-45 deg.c under the protection of nitrogen and maintaining for 20-40 min; heating to 60-90 deg.c for static polymerization for 1.5-3 hr, stoving and crushing to obtain final product. The said process can change the expired gun propellant into useful material.

Description

1. Technical field: [0001] The invention relates to a preparation method of a superabsorbent material, in particular to a method for synthesizing a superabsorbent resin by using expired military propellants. 2. Background technology: [0002] The development and research of superabsorbent resin has only a few decades of history. It started in 1961 in foreign countries, and the first superabsorbent resin was synthesized in my country in 1982, and the first patent was obtained in 1988. There are many types of superabsorbent resins, which can be divided into three series according to materials, namely starch, cellulose, and synthetic resin. Since the source of cellulose is not as easy to obtain as starch, cellulose graft copolymers are less used than the other two types. For example, the patent CN 1075488A invented a method of using acrylic acid, acrylamide and starch ternary copolymerization to form a superabsorbent resin. It is binary copolymerized with acrylamide to form a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/02C08J11/00
Inventor 李利司玲李邨
Owner NANJING NORMAL UNIVERSITY
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