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High-chroma impact-resistant polystyrene and its preparation method and preparation device

A technique for preparing polystyrene, which is applied in the field of synthetic resin, can solve problems such as corroding equipment, affecting the appearance of products, and affecting the color of high-impact polystyrene products, achieving the effect of reducing wall hanging and maintaining stability

Active Publication Date: 2021-01-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

FeCl 2 Not only will it corrode the equipment, but it will also accumulate on the equipment in the reaction system for a long time to form a wall, which will fall off irregularly, which will affect the color of the high-impact polystyrene product, thereby affecting the appearance of the product

Method used

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  • High-chroma impact-resistant polystyrene and its preparation method and preparation device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a preparation device for high-chroma impact-resistant polystyrene, figure 1 For the preparation device of high-chroma impact-resistant polystyrene provided in the embodiment of the present invention, please refer to figure 1 , the device includes a reaction unit 1, a devolatilization unit 2, a purification unit 3, a cooling unit 4, a liquid-liquid separation unit 5, a drive unit 6 that are connected in sequence, and the drive unit 6 is connected with the reaction unit 1 and the waste liquid collection unit 7 respectively. Specifically, the drive unit 6 is communicated with the reaction unit 1 and the waste liquid collection unit 7 through the tee respectively, and when the liquid in the liquid-liquid separation unit 5 needs to be input to the reaction unit 1 through the drive unit 6, the tee can be rotated to make the The drive unit 6-reaction unit 1 road is unblocked. When the liquid in the liquid-liquid separation unit 5 needs to be input to t...

Embodiment 2

[0031] In this example, the preparation device in Example 1 is used to prepare high-chroma impact-resistant polystyrene.

[0032] 1. Material preparation

[0033] 7 parts by weight of rubber, 83 parts by weight of styrene, and 10 parts by weight of ethylbenzene, wherein the rubber is a mixture of linear structure rubber and star structure rubber in a mass ratio of 1:1. The volatile matter (moisture) of the linear structure rubber is 0.5%, and the chloride ion content is 0.08%; the volatile matter (moisture) of the star-shaped structure rubber is 0.6%, and the chloride ion content is 0.2%.

[0034] 2. Reaction

[0035] In the reaction unit 1, the above-mentioned rubber was dissolved in styrene and ethylbenzene. After the rubber was fully dissolved, the temperature was raised to 128° C. for high-temperature polymerization. When the polymerization conversion rate was 75%, the reaction slurry was input to the devolatilization unit 2 After devolatilizing at a high temperature of ...

Embodiment 3

[0040] In this example, the preparation device in Example 1 is used to prepare high-chroma impact-resistant polystyrene.

[0041] 1. Material preparation

[0042] 8 parts by weight of rubber, 80 parts by weight of styrene, and 12 parts by weight of ethylbenzene, wherein the rubber is a mixture of linear structure rubber and star structure rubber in a mass ratio of 2:3. The volatile matter (moisture) of the linear structure rubber is 0.7%, and the chloride ion content is 0.1%; the volatile matter (moisture) of the star structure rubber is 0.8%, and the chloride ion content is 0.25%.

[0043] 2. Reaction

[0044] In the reaction unit 1, the above-mentioned rubber was dissolved in styrene and ethylbenzene. After the rubber was fully dissolved, the temperature was raised to 130° C. for high-temperature polymerization. When the polymerization conversion rate was 78%, the reaction slurry was input to the devolatilization unit 2 After devolatilizing at a high temperature of 225°C a...

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Abstract

The invention provides a high-chroma impact-resistant polystyrene, a preparation method and a preparation device thereof. The preparation device comprises a reaction unit, a devolatilization unit, a purification unit, a cooling unit, a liquid-liquid separation unit and a driving unit which are communicated in sequence. The driving unit is communicated with the reaction unit and a waste liquid collection unit respectively, wherein the liquid-liquid separation unit is communicated with the driving unit through a first pipe, and a cleaning liquid inlet and a cleaning liquid outlet are also arranged on the first pipe, the cleaning liquid inlet is arranged at one end close to the liquid-liquid separating unit, and the cleaning liquid outlet is arranged at one end close to the driving unit. Thefirst pipe needs to be cleaned during the preparation process and the raw material for preparation in the reaction unit comprises linear structural rubber and / or a mixture of linear structural rubberand star rubber. The invention can not only obtain impact polystyrene with high chromaticity, but also effectively control the chromaticity stability of the impact-resistant polystyrene.

Description

technical field [0001] The invention relates to a high-chroma impact-resistant polystyrene, a preparation method and a preparation device thereof, and belongs to the technical field of synthetic resins. Background technique [0002] High-impact polystyrene is a product obtained by introducing rubber in order to improve the impact resistance of general-purpose polystyrene. The rubbers generally used in industry are polybutadiene rubber and styrene-butadiene rubber, but no matter which rubber type is in its Due to the addition of coupling agent or dispersant in the production process, Cl is introduced into rubber products. - , Cl - with Fe in the device 2+ Form FeCl 2 . FeCl 2 It not only corrodes the equipment, but also accumulates on the equipment for a long time in the reaction system to form hanging walls, and falls off irregularly, which affects the color and luster of high-impact polystyrene products, thereby affecting the appearance of the products. SUMMARY OF TH...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08F212/08C08F2/01C08J11/02
CPCC08F2/01C08F289/00C08J11/02C08F212/08
Inventor 朱军杨昌辉张璐刘新伟薛江龚官浩吴利平关莉廖仿燕
Owner PETROCHINA CO LTD
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