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ABS production technology through bulk polymerization method

A technology of ABS resin and production process, which is applied in the field of manufacturing ABS resin to achieve continuous production, reduce investment and production costs, and avoid the effect of clogging the reactor

Inactive Publication Date: 2013-12-18
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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  • ABS production technology through bulk polymerization method

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Embodiment 1

[0045] The reaction mixture in the continuous fully mixed flow reactor includes: (1) Rubber solution: 65% styrene, 21% acrylonitrile, 14% butadiene rubber (percentage relative to the rubber solution). The content of cis structure in the butadiene rubber used is 40%, and the content of 1,2-structure is 13%; (2) tert-butyl peroxyneodecanoate 0.03%; (3) α-methylstyrene dimer 0.05%; (4) 20% ethylbenzene (percentage relative to the rubber solution).

[0046] A 0.05% mercaptan was added to a stirred plug flow reactor.

[0047] Production Process:

[0048] (1) Rubber grafting process: the rubber solution is added to the continuous fully mixed flow reactor for grafting reaction, the reaction temperature is 70°C, and the dry matter content of the reaction mixture in the continuous fully mixed flow reactor is controlled to be 18wt% ;

[0049] (2) Phase transformation process: the reaction mixture in the continuous fully mixed flow reactor was discharged into a plug flow reactor with ...

Embodiment 2

[0054] The reaction mixture in the continuous fully mixed flow reactor includes: (1) Rubber solution: 70% styrene, 25% acrylonitrile, 5% butadiene rubber (percentage relative to the rubber solution). The content of cis structure in the butadiene rubber used is 35%, and the content of 1,2-structure is 30%; (2) tert-butyl peroxypivalate 0.01%; (3) α-methylstyrene dimer 0.1%; (4) 30% toluene (percentage relative to the rubber solution).

[0055] A 0.1% mercaptan was added to a stirred plug flow reactor.

[0056] Production Process:

[0057](1) Rubber grafting process: the rubber solution is added to the continuous fully mixed flow reactor for grafting reaction, the reaction temperature is 75°C, and the dry matter content of the reaction mixture in the continuous fully mixed flow reactor is controlled to be 18wt% ,

[0058] (2) Phase transformation process: The reaction mixture in the continuous fully mixed flow reactor was discharged into a plug flow reactor with stirring, and...

Embodiment 3

[0063] The reaction mixture in the continuous fully mixed flow reactor includes: (1) Rubber solution: 66% styrene, 21% acrylonitrile, 13% styrene-butadiene rubber (percentage relative to the rubber solution). The butadiene content of the styrene-butadiene rubber used is 60% and the styrene content is 40%; (2) t-butyl peroxypivalate 0.02%; (3) α-methylstyrene dimer 0.01%; ( 4) Ethylbenzene 20% (percentage relative to the rubber solution); (5) Itaconic acrylate, the third monomer, 5%.

[0064] A 0.2% mercaptan was added to a stirred plug flow reactor.

[0065] Production Process:

[0066] (1) Rubber grafting process: the rubber solution is added to the continuous fully mixed flow reactor for grafting reaction, the reaction temperature is 75°C, and the dry matter content of the reaction mixture in the continuous fully mixed flow reactor is controlled to be 20wt% ;

[0067] (2) Phase transformation process: The reaction mixture in the continuous fully mixed flow reactor was dis...

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Abstract

The invention discloses an ABS (Acrylonitrile Butadiene Styrene) production technology through a bulk polymerization method. The technology comprises the steps of: (1) a rubber grafting process: mixing reaction materials and carrying out a grafting reaction at 71-75 DEG C in a continuous stirred-tank reactor (CSTR); (2) a phase transition process: discharging reaction mixture in the CSTR to a stir piston flow reactor (stir-PFR), mixing the reaction mixture with a chain transfer agent B, and continuing to carry out a polymerization reaction at 105-115 DEG C; (3) carrying out a post polymerization process in a JLF-series enhanced heat transfer static-state mixing reactor of Jiangsu Julong limited company; (4) a vacuum flash evaporation devolatilization process; and (5) a rubber particle crosslinking process to obtain the ABS resin. The enhanced heat transfer static-state mixing reactor has void fraction of 75-90%, heat transfer area of unit volume of 45-60 m<2> / m<3> and empty tower flow velocity of 1-10 mm / s. The invention successfully applies the static-state mixing reactor to the bulk polymerization of ABS resin, reduces energy consumption, avoids reactor obstruction by polymers, reaches a high production conversion rate of 80-90% and obviously reduces investment and production cost.

Description

technical field [0001] The invention relates to a production process for producing ABS resin by means of bulk polymerization. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F279/04C08F2/02C08F2/01
Inventor 唐来安
Owner SHANGHAI HUAYI POLYMER
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