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Rapid efficient method for preparing acrylonitrile polymer

An acrylonitrile and polymer technology, which is applied in the field of rapid and efficient preparation of acrylonitrile polymers, can solve the problems of environmental pollution, slow reaction rate, solvent corrosivity and volatility, etc. Effect

Inactive Publication Date: 2006-05-24
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a fast and efficient method for preparing acrylonitrile polymers, so as to make up for the slow reaction rate and the strong corrosiveness and volatility of the used solvent when the acrylonitrile existing in the prior art is polymerized by solution. Cause serious environmental pollution and other defects to meet the needs of production and development in certain fields

Method used

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  • Rapid efficient method for preparing acrylonitrile polymer
  • Rapid efficient method for preparing acrylonitrile polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 8 grams [Bmim]BF 4 Ionic liquid, pour the weighed 0.016g initiator azobisisobutyronitrile into it, then add 0.000308mol of itaconic acid, and then add 0.0236mol of acrylonitrile and 0.00256mol of methyl acrylate in sequence. Stop stirring the ionic liquid. After the mixture is uniformly stirred, the mixed ionic liquid is heated to 65° C., and the temperature is maintained for 4 hours to fully polymerize. According to the national standard, the viscosity average molecular weight of the obtained acrylonitrile copolymer is 6.46×10 4 , The conversion rate reached 78%.

Embodiment 2

[0021] Take 8 grams of [Bmim]BF4 ionic liquid, pour in the weighed 0.016 grams of initiator azobisisobutyronitrile, then add 0.000154mol of itaconic acid, and then add 0.0236mol of acrylonitrile and 0.00337mol of acrylic acid in sequence The ionic liquid is constantly agitated while adding the ester. After the mixture is uniformly stirred, the mixed ionic liquid is heated to 70°C, and the temperature is maintained for 1 hour to fully polymerize. According to the national standard, the viscosity average molecular weight of the obtained acrylonitrile copolymer is 5.32×10 4 , The conversion rate reached 80%.

Embodiment 3

[0023] Take 8 grams of [Bmim]BF4 ionic liquid, pour in the weighed 0.016 grams of initiator azobisisobutyronitrile, then add 0.000308mol of itaconic acid, and then add 0.0236mol of acrylonitrile and 0.00256mol of acrylic methyl in sequence The ionic liquid is constantly agitated while adding the ester. After the mixture is uniformly stirred, the mixed ionic liquid is heated to 80°C, and the temperature is maintained for 0.5 hours to fully polymerize. According to the national standard, the viscosity average molecular weight of the obtained acrylonitrile copolymer is 5.32×10 4 , The conversion rate reached 80%.

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Abstract

The invention discloses a fast high efficiency preparation acrylonitrile polymer method. It includes the following steps that the first monomer acrylonitrile, the second monomer acrylic acid methyl ester, the third monomer itaconic acid, and initiator are added into ion liquid orderly. It is churned and done polyreaction for 0.5-4h at 50-80 centigrade degree. Then acrylonitrile copolymer is gained. The benefit effects of the invention are that the polyreaction rate is increased greatly; the conversion is increased greatly; the adopted ion liquid has no volatility; and this is of great advantage to reclaim the ion liquid; the liquid state range of the adopted ion liquid is wide; and this is of great advantage to control reaction temperature.

Description

Technical field [0001] The present invention relates to a method for preparing acrylonitrile polymer, in particular to a method of [Bmim]BF 4 Rapid and efficient method for preparing acrylonitrile polymer in ionic liquid. Background technique [0002] Acrylonitrile can undergo bulk polymerization, emulsion polymerization and solution polymerization. The actual production mostly uses solution polymerization, generally sodium thiocyanate aqueous solution, concentrated zinc chloride aqueous solution, nitric acid, ethylene carbonate, dimethyl sulfoxide, dimethyl Formamide or dimethylacetamide is used as the polymerization solvent. The solution polymerization of acrylonitrile in these solvents has the advantages of low viscosity of the polymerization system, easier mixing and heat transfer, and easy temperature control, but there are also some disadvantages, such as low monomer concentration and slow polymerization rate leading to production capacity and equipment utilization Low, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/44C08F2/04C08F220/04C08F220/14
Inventor 张玉梅李达王华平王彪刘崴崴赵婷婷赵天瑜屠晓萍
Owner DONGHUA UNIV
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