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Continuous pipe type flexible plug flow reactor and method for preparing mass ABS resin or SAN resin

A plug flow reactor, ABS resin technology, applied in the plug flow reactor system to prepare high-performance ABS or SAN resin, can solve the problems of narrow molecular weight distribution, prominent color of product appearance, wall hanging of the reactor, etc. Narrow molecular weight distribution, excellent processability and high impact strength

Active Publication Date: 2013-04-10
NORTH HUAJIN CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the preparation of SAN resin by continuous serial series reactors cannot be fully operated, the wall hanging phenomenon of the reactor is serious, and the appearance and color of the product are prominent.
The plug-flow continuous tubular reactor can also be used in the production of SAN resin. The plug-flow reactor arranged in series has good mass transfer and heat transfer performance, and the residence time of the material is uniform. The produced SAN resin product has a molecular weight of The distribution is narrow, the overall performance of the product is better, and the cost is lower. However, due to technical limitations, there is no domestic manufacturer that uses this type of reactor to produce bulk SAN.

Method used

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  • Continuous pipe type flexible plug flow reactor and method for preparing mass ABS resin or SAN resin
  • Continuous pipe type flexible plug flow reactor and method for preparing mass ABS resin or SAN resin
  • Continuous pipe type flexible plug flow reactor and method for preparing mass ABS resin or SAN resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In the polymerization system of four plug-flow reactors arranged in series, the material in the second plug-flow reactor undergoes a phase transition. The dispersed phase is rubber particles grafted with styrene and acrylonitrile block copolymers, and the continuous phase is large Molecule of styrene, acrylonitrile copolymer. The weight percent of each component in the raw material liquid entering the first plug flow reactor is: styrene 63.6%, butadiene rubber 8.4%, acrylonitrile 14%, ethylbenzene 14%. The concentration of the initiator solution is 70ppm, and the flow rate is controlled at 0.7g / h. The concentration of the chain transfer agent is 45ppm, and the control flow rate is 0.5g / h.

[0023] The temperature of the upper, middle and lower zones of the first plug flow reactor is set at 102.8°C, 106.6°C, and 108.5°C, respectively.

[0024] The temperature of the upper, middle and lower zones of the second plug-flow reactor is set at 115.1°C, 119.9°C, and 123.3°C, r...

Embodiment 2

[0035] In the polymerization system of four plug-flow reactors arranged in series, the material in the second plug-flow reactor undergoes a phase transition. The dispersed phase is rubber particles grafted with styrene and acrylonitrile block copolymers, and the continuous phase is large Molecule of styrene, acrylonitrile copolymer. The weight percent of each component in the raw material liquid entering the first plug flow reactor is: styrene 63.6%, solution polystyrene butadiene rubber 8.4%, acrylonitrile 14%, ethylbenzene 14%. The concentration of the initiator solution is 70ppm, and the flow rate is controlled at 0.7g / h. The concentration of the chain transfer agent is 45ppm, and the control flow rate is 0.5g / h.

[0036] The temperature of the upper, middle and lower zones of the first plug flow reactor is set at 101.8°C, 105.6°C, and 108.3°C, respectively.

[0037] The temperature of the upper, middle and lower zones of the second plug-flow reactor is set at 115.4°C, 11...

Embodiment 3

[0048] In the polymerization system of four plug-flow reactors arranged in series, the material in the second plug-flow reactor undergoes a phase transition. The dispersed phase is rubber particles grafted with styrene and acrylonitrile block copolymers, and the continuous phase is large Molecule of styrene, acrylonitrile copolymer. The percentages by weight of each component in the raw material liquid entering the first plug flow reactor are: styrene 63.6%, soluble polystyrene-butadiene-isoprene ternary integrated rubber 8.4%, acrylonitrile 14%, Ethylbenzene 14%. The concentration of the initiator solution is 70ppm, and the flow rate is controlled at 0.7g / h. The concentration of the chain transfer agent is 45ppm, and the control flow rate is 0.5g / h.

[0049] The temperature of the upper, middle and lower zones of the first plug flow reactor is set to 101.2°C, 104.6°C, and 109.8°C respectively.

[0050] The temperature of the upper, middle and lower zones of the second plug...

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Abstract

The invention relates to a continuous pipe type flexible plug flow reactor and a method for preparing mass ABS (acrylonitrile butadiene styrene) resin or SAN (styrene acrylonitrile plastic) resin. The process comprises the following four parts: a raw material preparation system, a polymerization reaction system, a vacuum-pumping system and an extrusion granulation system. The reaction system includes four plug flow reactors and different material loops. The four plug flow reactors can be connected in series for producing the ABS resin with a continuous mass method by controlling the different material loops. One or two double tandem plug flow reactor sets with reflux systems can be also connected in parallel for producing the SAN resin with the continuous mass method. When the SAN resin is prepared, the reflux ratio of the reflux systems of the double tandem plug flow reactor sets is controlled so as to control the polymerization degree of the polymerization reaction of the SAN resin. The ABS or SAN resin products prepared with the flexible device and the production process capable of producing the continuous mass ABS resin or SAN resin have the characteristics of controllable molecular weight, narrower molecular weight distribution, excellent product performance and good device process stability.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis and preparation, relates to synthetic resin technology and equipment, in particular to a plug-flow reactor system arranged in series and parallel structures based on logistics flow control and a method for preparing high-performance ABS or SAN resin . Background technique [0002] ABS resin has the characteristics of heat resistance, high surface hardness, stable size, chemical resistance and good electrical properties. It is easy to form and has excellent machining performance. It is widely used in the fields of electronic appliances, instruments and meters, automobiles, building materials industry and daily products. Applications. ABS applications in my country are highly concentrated in refrigerators, televisions, telephones, office supplies and other electronic and electrical accessories, accounting for 80% of consumption, and toys and auto parts each accounting for 10%. In recent y...

Claims

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Application Information

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IPC IPC(8): C08F279/04C08F212/10C08F2/01C08F2/02
Inventor 申凯华李杨袁博蓝云飞王益波王艳色李耀波郑建国刘万胜刘维钧张锋吴玉祥周川刘福德张素杰范铁军郑树松
Owner NORTH HUAJIN CHEM IND CO LTD
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