HIPS (High Impact Polystyrene) resin production process system containing internal circulation device and high-performance HIPS resin preparation method

A production process and internal circulation technology, applied to the method of using atmospheric pressure to chemically change substances, chemical instruments and methods, chemical industry, etc., can solve the problem of wide molecular weight distribution of rubber particles, high energy consumption of reactors, and poor system stability and other problems, to achieve the effects of narrow molecular weight distribution of rubber particles, improved dispersion, and excellent processing performance

Active Publication Date: 2022-08-09
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of poor system stability, high energy consumption of the reactor, wide molecular weight distribution and poor dispersibility of the prepared rubber particles in the HIPS production process system in the prior art, the present invention proposes a method comprising an internal circulation reactor and Production Process System of High Performance HIPS Resin in Static Mixing Reactor

Method used

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  • HIPS (High Impact Polystyrene) resin production process system containing internal circulation device and high-performance HIPS resin preparation method
  • HIPS (High Impact Polystyrene) resin production process system containing internal circulation device and high-performance HIPS resin preparation method
  • HIPS (High Impact Polystyrene) resin production process system containing internal circulation device and high-performance HIPS resin preparation method

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Effect test

Embodiment 1

[0055] like figure 1 As shown, a HIPS resin production process system containing an internal circulation device comprises an internal circulation reactor R1, a first plug flow reactor R2, a second plug flow reactor R3 and a static mixing reactor R4 which are connected in series through pipelines in sequence; The material output end of the static mixing reactor R4 is sequentially connected in series with the devolatilizer and the granulator through pipelines (not shown). The function of the devolatilizer is to flash off the unreacted styrene monomer and solvent and recycle it for recycling, and the molten material is passed through a granulator to obtain the HIPS resin product.

[0056] The internal circulation reactor R1 is a series loop composed of a first-stage static mixer a, a second-stage static mixer b, a third-stage static mixer c, and a circulating pump that are connected in sequence through pipelines; The series filter D is then communicated with the circulating loop...

Embodiment 2

[0070] Use the high-performance HIPS resin produced in Example 1. The weight percentage of each component entering the fully mixed flow reactor R1 is: the mixed glue solution including the styrene, initiator, chain transfer agent and solvent of the dissolved polystyrene-butadiene-isoprene ternary integrated rubber accounts for The weight ratio is 8.4%, styrene accounts for 77.6% of the glue, and ethylbenzene accounts for 14% of the glue. The concentration of the initiator in the styrene solution was 70 ppm, and the flow rate was controlled at 0.7 g / h. The chain transfer agent accounts for 35ppm of styrene, and the control flow rate is 0.5g / h.

[0071] The setting temperature of the inner circulation reactor is 100-115°C, and the preferred temperatures of the first, second and third stage static mixers R1-abc in the inner circulation reactor are 105.1°C, 105.4°C, 105.8°C, and the pressure is 0.26°C. MPa, 0.27MPa, 0.28MPa, the plug flow reactor R2-3 is a tubular reactor, and t...

Embodiment 3

[0084] Use the high-performance HIPS resin produced in Example 1. The internal circulation reactor R1 is a prepolymerization reactor, and the continuous rubber phase undergoes a prepolymerization process of grafting GPPS in this reactor. The monomer is pumped back into the system to continue the reaction, which is beneficial to improve the rubber grafting rate and monomer conversion rate, and stabilize the product quality. The internal circulation R1 reactor helps to obtain rubber particles with narrow molecular weight molecules. The materials sequentially enter the primary and secondary plug flow reactors and the independently connected static mixing reactor R4 for further GPPS grafting reaction process. The weight percentage of each component in the raw material liquid entering the grafting reactor is: the amount of dissolved polystyrene-butadiene-isoprene ternary integrated rubber accounts for the mixture of styrene, initiator, chain transfer agent and solvent. The weight ...

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to an HIPS (High Impact Polystyrene) resin production process system containing an internal circulation device and a body preparation method. The system comprises an internal circulation reactor, a piston flow reactor and a static mixing reactor which are sequentially connected in series through pipelines, the internal circulation reactor consists of three static mixers which are sequentially connected in series; the number of the piston flow reactors is two. The problems of poor operation stability, high energy consumption, wide molecular weight distribution of rubber particles, poor dispersibility and the like in the prior art are effectively solved, the rubber particles with small sizes and unreacted monomers are pumped back into the system by the internal circulation reactor to continue to react, the rubber grafting rate and the monomer conversion rate are improved, the product quality is stabilized, and the production cost is reduced. The improved device is stable in operation and low in energy consumption, the prepared HIPS resin product has the characteristics of narrow molecular weight distribution of rubber particles, uniform dispersion and high impact strength, the industrial production prospect is good, and the economic benefit is remarkable.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis and preparation technology, and particularly relates to a HIPS resin production technology system including an internal circulation device and a preparation method of a high-performance HIPS resin. Background technique [0002] General purpose polystyrene (GPPS) resin, i.e. styrene homopolymer, is one of the earliest industrialized synthetic resins with good transparency, rigidity, dimensional stability, processing fluidity, chemical resistance and electrical insulation, etc. , widely used in engineering, automotive industry, household appliances and other fields. However, the further application of GPPS is limited due to its insufficient fracture toughness, environmental stress cracking resistance, solvent resistance, and heat resistance. In recent years, toughened resins have been widely developed and applied, among which high impact polystyrene (HIPS) is a typical rubber toughened res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J3/04B01J3/00C08F279/02C08F212/08C08F2/01
CPCB01J3/04B01J3/006C08F279/02C08F2/01C08F212/08Y02P20/10
Inventor 李杨冷雪菲韩丽王艳色
Owner DALIAN UNIV OF TECH
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