Synthesis method of acrylonitrile and chloroethylene copolymer

A synthetic method and technology of acrylonitrile, applied in the direction of wet spinning, etc., can solve problems such as the difference in reactivity, affecting the composition, stability and conversion rate of polymer products, and achieve the effects of low cost, uniform product composition and simple operation

Inactive Publication Date: 2012-03-21
余天石 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the reactivity of vinyl chloride and acrylonitrile is very different, and the polymerization reaction rate of acrylonitrile is much faster than that of vinyl chloride. Therefore, the addition method of the two monomers has become an important factor affecting the composition, stability and conversion rate of polymer products. important factor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 5000 grams of vinyl chloride into the polymerization reactor, 100 grams of sodium lauryl sulfate, 1050 grams of OP-1050 grams, 5 grams of ammonium persulfate, 40 grams of sodium metabisulfite, 25 grams of anhydrous sodium acetate, 18 grams of glacial acetic acid, and 5 grams of diaminetetraacetic acid, after being mixed with solution, drop in the reaction kettle, water 23700 grams. After stirring at 220 rpm for 20 minutes, the temperature was raised to 45°C. After reaching the reaction temperature, 5000 grams of acrylonitrile and an auxiliary agent solution (120 grams of ammonium persulfate, 350 grams of sodium lauryl sulfate, and 4000 grams of water) were evenly fed with a metering pump. After the reaction pressure was reduced to 0.2MPa, the material was discharged to obtain a white emulsion. After the emulsion is demulsified with a saturated sodium chloride solution, it is washed, dehydrated and dried to obtain a copolymer of vinyl chloride and acrylonitrile. Th...

Embodiment 2

[0026] Put 5000 grams of vinyl chloride into the polymerization reactor, 100 grams of sodium lauryl sulfate, 1050 grams of OP-1050 grams, 5 grams of ammonium persulfate, 40 grams of sodium metabisulfite, 25 grams of anhydrous sodium acetate, 18 grams of glacial acetic acid, and 5 grams of diaminetetraacetic acid, after being mixed with solution, drop in the reaction kettle, water 23700 grams. After stirring at 220 rpm for 20 minutes, the temperature was raised to 30°C. After reaching the reaction temperature, 5000 grams of acrylonitrile and an auxiliary agent solution (120 grams of ammonium persulfate, 350 grams of sodium lauryl sulfate, and 4000 grams of water) were evenly fed with a metering pump. After the reaction pressure was reduced to 0.2MPa, the material was discharged to obtain a white emulsion. After the emulsion is demulsified with a saturated sodium chloride solution, it is washed, dehydrated and dried to obtain a copolymer of vinyl chloride and acrylonitrile. Th...

Embodiment 3

[0028] Put 5000 grams of vinyl chloride into the polymerization reactor, 100 grams of sodium lauryl sulfate, 1050 grams of OP-1050 grams, 5 grams of ammonium persulfate, 50 grams of sodium metabisulfite, 25 grams of anhydrous sodium acetate, 18 grams of glacial acetic acid, and 5 grams of diaminetetraacetic acid, after being mixed with solution, drop in the reaction kettle, water 23700 grams. After stirring at 220 rpm for 20 minutes, the temperature was raised to 60°C. After reaching the reaction temperature, 5000 grams of acrylonitrile and an auxiliary agent solution (120 grams of ammonium persulfate, 350 grams of sodium lauryl sulfate, and 4000 grams of water) were evenly fed with a metering pump. After the reaction pressure was reduced to 0.2MPa, the material was discharged to obtain a white emulsion. After the emulsion is demulsified with a saturated sodium chloride solution, it is washed, dehydrated and dried to obtain a copolymer of vinyl chloride and acrylonitrile. Th...

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Abstract

The synthesis process of acrylonitrile-vinyl chloride copolymer relates to the preparation of no-additive fireproof acrylon resin. The synthesis process of acrylonitrile-vinyl chloride copolymer includes throwing vinyl chloride monomer into reaction kettle, throwing the solution compounded with sodium dodecyl sulfate, OP-10, initiator, anhydrous sodium acetate, glacial acetic acid and EDTA into reaction kettle, heating to 30-60 deg.c, adding solution compounded with acrylonitrile monomer, initiator, sodium dodecyl sulfate and water with two metering pumps, so as to react until the pressure islowered to 0.2 MPa; discharging to obtain white emulsion; demulsifying the emulsion with saturated sodium chloride solution to obtain paste; water washing in a centrifuge, dewatering and drying to obtain fireproof acrylon resin. The copolymer product has raised stability and conversion rate.

Description

technical field [0001] The invention relates to a preparation method of a non-additive flame-retardant acrylic resin. Background technique [0002] In foreign countries, many industries and fields have quite strict flame-retardant requirements for fabrics and fiber fabrics, such as interiors, carpets, curtains, wall coverings, etc. in public places, hotels, hotels, etc., must meet the corresponding statutory fire protection standards; Fire-resistant clothing for special industries such as baby pajamas and firefighters must also use flame-retardant materials. In China, the industry standards, laws and regulations in this area have not yet been perfected. With the development of the national economy and the continuous improvement of people's living standards, people gradually realize the importance of fiber fire prevention and flame retardant. Therefore, the development of flame retardant fibers has important Great practical significance and market value. [0003] As a commo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/44C08F2/22D01F6/18D01D5/06C08F214/06
Inventor 余天石
Owner 余天石
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