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Polybutadiene latex synthesis process

A polybutadiene latex and synthesis process technology, applied in the field of engineering plastics ABS production, can solve the problems of complex process, increase equipment investment and energy consumption, increase nitrogen consumption and other problems, achieve simple operation process, realize comprehensive utilization, The effect of saving equipment investment

Active Publication Date: 2012-08-01
CHINA TIANCHEN ENG +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pumping process is more complicated, and increases equipment investment and energy consumption
Gas delivery, that is, nitrogen delivery increases nitrogen consumption and introduces nitrogen into the system
[0005] In addition, the existing process uses the steam stripping method when stripping and separating the monomers in the small particle latex. The steam stripping method needs to consume a large amount of steam, and it also needs to be equipped with stripping steam condensation separation equipment, and the process is relatively complicated. Energy consumption is also high

Method used

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  • Polybutadiene latex synthesis process
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Examples

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Embodiment 1

[0056] A kind of polybutadiene latex synthesis technique, comprises the steps:

[0057] (1) The liquid additive (potassium oleate 109, potassium hydroxide 102, acetic acid 116) is diluted and prepared to the required concentration by the liquid additive reagent preparation system of the present invention and then enters the metering tank 2. With the solid additive reagent preparation system of the present invention, solid additive (potassium carbonate 110, disproportionated rosin potassium soap 104, initiator 106, potassium pyrophosphate 108) is dissolved and prepared into the metering tank 2 after the concentration required for the reaction, and each additive Each has its own preparation tank and metering tank 2;

[0058] (2) Polymerization reactor 3 is evacuated to 60mmHg, then adds desalted water 105, adds potassium hydroxide 102, potassium oleate 109, disproportionated rosin potassium soap 104, potassium carbonate 110, then adds benzene Ethylene 107, tert-dodecyl mercapta...

Embodiment 2

[0064] A kind of polybutadiene latex synthesis technique, comprises the steps:

[0065] (1) The liquid additive (potassium oleate 109, potassium hydroxide 102, acetic acid 116) is diluted and prepared to the required concentration by the liquid additive reagent preparation system of the present invention and then enters the metering tank 2. With the solid additive reagent preparation system of the present invention, solid additive (potassium carbonate 110, disproportionated rosin potassium soap 104, initiator 106, potassium pyrophosphate 108) is dissolved and prepared into the metering tank 2 after the concentration required for the reaction, and each additive Each has its own preparation tank and metering tank 2;

[0066] (2) Polymerization reactor 3 is evacuated to 70mmHg, then adds desalted water 105, adds potassium hydroxide 102, potassium oleate 109, disproportionated rosin potassium soap 104, potassium carbonate 110, then adds benzene Ethylene 107, tertiary dodecyl merc...

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Abstract

The invention provides a polybutadiene latex synthesis process. The synthesis process comprises the following steps of (1) subjecting butadiene monomers and other raw materials required in the reaction to polymerization reaction in a polymerization reactor, and polymerizing into small granular latexes with granular sizes from 80 nm to 120 nm; (2) after the polymerization reaction, vacuumizing a degassing tank, and conveying the small granular latexes to the degassing tank through the differential pressure between the polymerization reactor and the degassing tank for vacuum stripping; and (3) placing the stripped small granular latexes and other raw materials required in the agglomeration reaction in an agglomeration reactor, and agglomerating the mixture into polybutadiene latexes with granular sizes from 300 nm to 450 nm. The degassing tank is vacuumized, and the differential pressure is utilized for conveying the latexes so that the polybutadiene latex synthesis process has the advantages of being simple in process, high in energy utilization, small in equipment investment and the like, and the conversion ratio of the butadiene is no less than 98%. Further, the invention also provides a set of advanced precise reagent preparation system and a reagent adding system, so that the accuracy of the additive concentration and the additive amount required by the reaction is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of ABS production of engineering plastics, in particular to a polybutadiene latex synthesis process. Background technique [0002] ABS resin is a resin obtained by copolymerizing butadiene, styrene and acrylonitrile ternary monomers. It has excellent comprehensive physical-mechanical properties and is one of the important resins in engineering polymer materials. The production methods of ABS resin mainly include emulsion grafting-bulk SAN blending method and continuous bulk method. At present, the emulsion grafting-bulk SAN blending method is widely used. The continuous bulk method has made many major breakthroughs in recent years, but it has not yet dominated the production. [0003] Emulsion grafting-bulk SAN blending method, first adopts butadiene polymerization to produce polybutadiene (PB) latex, then PB latex is grafted and polymerized with styrene and acrylonitrile to produce ABS grafted powder, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F236/10C08F2/24C08F2/38C08F6/14
Inventor 耿玉侠裴艳红马国栋杨克俭李强袁学民郑仁王美娇王瑞博
Owner CHINA TIANCHEN ENG
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