Improvement process for bulk polymerization of ABS resin

A technology of ABS resin and bulk polymerization, which is applied in the field of improved technology of bulk polymerization ABS resin, to achieve high production conversion rate, reduce energy consumption, reduce investment and production costs

Inactive Publication Date: 2013-12-25
SHANGHAI HUAYI POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to overcome the defect that it is difficult to prepare ABS resin with a static mixing reactor in the prior art. According to the actual production process of ABS resin, through the research on the static mixing reactor and operating conditions, the static The mixing reactor is applied to the production process of bulk ABS resin, providing a production process for bulk polymerization of ABS resin using a static mixer

Method used

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  • Improvement process for bulk polymerization of ABS resin

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Effect test

Embodiment 1

[0043] The first reactor is a static mixing reactor, the second reactor is a CSTR reactor, the first reactor is used as a reactor for the rubber grafting process, and the second reactor is used as a reactor for the phase inversion process.

[0044] The reaction mixture in the first reactor includes: (1) Rubber solution: 45% styrene, 45% acrylonitrile, and 10% styrene-butadiene rubber (percentage relative to the rubber solution). The butadiene content in the styrene-butadiene rubber used is 70%, and the styrene content is 30%; (2) tert-butyl peroxypivalate 0.02%; (3) α-methylstyrene dimer 0.04%; ( 4) Ethylbenzene 20% (relative to the percentage of rubber solution); (5) The third monomer butyl acrylate 2%.

[0045] Add mercaptan 0.15% in the second reactor.

[0046] Production Process:

[0047] (1) Rubber grafting process: the rubber solution is added to a static mixing reactor for grafting reaction. The conditions of the static mixing reactor are as follows: a. The porosity o...

Embodiment 2

[0053] The first reactor is a static mixing reactor, the second reactor is a stir-PFR reactor, the first reactor is used as a reactor for the rubber grafting process, and the second reactor is used as a reactor for the phase inversion process.

[0054] The reaction mixture in the first reactor includes: (1) Rubber solution: 50% styrene, 35% acrylonitrile, and 15% styrene-butadiene rubber (percentage relative to the rubber solution). The butadiene content in the styrene-butadiene rubber used is 70%, and the styrene content is 30%; (2) tert-butyl peroxypivalate 0.02%; (3) α-methylstyrene dimer 0.04%; ( 4) Ethylbenzene 20% (relative to the percentage of rubber solution); (5) The third monomer butyl acrylate 2%.

[0055] Add mercaptan 0.15% in the second reactor.

[0056] Production Process:

[0057] (1) Rubber grafting process: the rubber solution is added to a static mixing reactor for grafting reaction, and the conditions of the static mixing reactor are as follows: a. The poro...

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Abstract

The present invention discloses an improvement process for bulk polymerization of an ABS resin. The improvement process comprises: (1) mixing a reaction material, and carrying out rubber grafting in a JLF series reinforcing heat transfer static mixing reactor, (2) carrying out phase transition, (3) carrying out post-polymerization in the JLF series reinforcing heat transfer static mixing reactor, (4) carrying out vacuum flash evaporation devolatilization, and (5) carrying out rubber particle cross-linking, wherein porosity of the reinforcing heat transfer static mixing reactor is 82-88%, a heat transfer area per unit volume is 51-54 m<2> / m<3>, an empty tower flow rate is 1-4 mm / s, the reaction material comprises a rubber solution, and the rubber solution comprises 45-50% of a styrene monomer, 5-45% of an vinyl unsaturated nitrile monomer, and 5-15% of uncross-linked butadiene rubber and / or styrene-butadiene rubber. According to the present invention, the static mixing reactor is successfully applied in the bulk polymerization of the ABS resin, such that energy consumption is reduced, the phenomenon that the reactor is clogged by the polymer is avoided, a production conversion rate is up to 80-90%, and investment cost and production cost are significantly reduced.

Description

technical field [0001] The invention relates to an improved process for bulk polymerizing ABS resin. Background technique [0002] ABS resin refers to acrylonitrile-styrene-butadiene copolymer (the acronym of Acrylonitrile Butadiene Styrene respectively) is a thermoplastic polymer material with high strength, good toughness and easy processing. Because of its high strength, corrosion resistance, and high temperature resistance, it is often used to make plastic casings for instruments. [0003] In the existing mass polymerization production process of ABS resin, two kinds of reactors are used in the polymerization reactor: continuous fully mixed flow reactor (CSTR for short) or plug flow reactor with stirring (stir-PFR for short). In the bulk polymerization process, the uniform mixing of reactants, the removal of reaction heat and the prevention of reactor wall sticking are very important, but the high viscosity of the reaction materials often makes it very difficult to unif...

Claims

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Application Information

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IPC IPC(8): C08F279/04C08F2/02C08F2/01
Inventor 时书军
Owner SHANGHAI HUAYI POLYMER
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