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Continuous bulk preparation method of acrylonitrile-ethylene propylene diene monomer (EPDM)-styrene (AES) resin

A technology of EPDM rubber and styrene resin is applied in the field of continuous bulk preparation of acrylonitrile-EPDM rubber-styrene resin, and can solve the problems of large amount of solvent, difficult removal and high post-processing cost, Achieve the effect of reducing equipment investment and production costs, simplifying post-processing procedures, and reducing material back-mixing

Active Publication Date: 2011-07-20
ZHEJIANG OCEANKING DEVELOPMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grafting efficiency of the AES resin obtained by this method is high, and the heat of reaction can be easily removed in time. However, due to the complex emulsifier system used, the post-treatment is not easy to remove, resulting in a high content of residual additives in the AES resin, and the process will produce A large amount of waste water with high COD content, high post-treatment costs
[0005] At present, the industrial production of AES is mostly implemented by the solution method. The obvious disadvantage of the solution method is that the amount of solvent is large, and the solvent accounts for more than 80wt% of the total mass of the polymerization system. The product needs to be precipitated with a large amount of methanol or ethanol. The recovered waste liquid is solvent, For the mixture of residual monomer and methanol or ethanol, the process of separating, purifying and reusing each component is complicated, the equipment investment is large, and the production cost is high. Therefore, it is necessary to develop a new synthesis process to reduce equipment investment, improve production efficiency, and reduce production costs.

Method used

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  • Continuous bulk preparation method of acrylonitrile-ethylene propylene diene monomer (EPDM)-styrene (AES) resin
  • Continuous bulk preparation method of acrylonitrile-ethylene propylene diene monomer (EPDM)-styrene (AES) resin
  • Continuous bulk preparation method of acrylonitrile-ethylene propylene diene monomer (EPDM)-styrene (AES) resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In the nitrogen-purged sol tank, add toluene and EPDM according to the parts by weight in Table 1, stir at 60°C for 8 hours until EPDM is completely dissolved, add styrene, acrylonitrile, tert-butyl perbenzoate, weight ratio 1:1 compound antioxidant of antioxidant 1076 and antioxidant 168, α-methylstyrene linear dimer, calcium stearate, continue to stir for 4 hours, after the sol is completed, the reaction solution enters three series In the tower reactor, the reaction flow diagram is as follows figure 1 shown. Continuous polymerization was carried out according to the conditions in Table 1, and the resulting polymerization product was subjected to steps such as devolatilization, extrusion, water cooling, and granulation to obtain yellowish resin product particles.

[0041] Table 1

[0042]

[0043]

[0044] Measure the tensile strength of the obtained resin product according to GB / T 1040.2-2006, measure the flexural strength according to GB / T 9341-2008, measure...

Embodiment 2

[0048] Add various raw materials according to the steps in Example 1, wherein the solvent is ethylbenzene, the initiator is tert-butyl peroxy-2-ethylhexyl carbonate, and the rest of the raw materials are the same as in Example 1. The obtained resin product was measured according to the same method in Example 1, and the results are shown in Table 2.

Embodiment 3

[0050] Add various raw materials according to the steps in Example 1, wherein the solvent is n-hexane, the initiator is 1,1-bis(tert-butylperoxy)cyclohexane, and the rest of the raw materials are the same as in Example 1. The obtained resin product was measured according to the same method in Example 1, and the results are shown in Table 2.

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Abstract

The invention relates to a continuous bulk preparation method of an acrylonitrile-ethylene propylene diene monomer (EPDM)-styrene (AES) resin. The method comprises the following steps of: adding the EPDM into a solvent to be dissolved completely under heating; mixing the solution, styrene, acrylonitrile, an initiator, a chain transfer agent, an antioxidant and a lubricant to form a rubber solution system; performing graft polymerization reaction sequentially through three series-wound tower reactors; performing aftertreatment through second-level vacuum devolatilization; and preparing the AES resin which is suitable for injection moulding and extrusion processing by controlling the variety of rubber, rubber content and the material feeding ratio. The resin product prepared by the preparation method has high impact strength, excellent weather resistance and notch impact strength retention rate of over 95 percent when an artificial xenon lamp is aged for 1,000 hours, and is applicable in the fields of automobile parts, electron and electricity, building materials, sports equipment and the like.

Description

technical field [0001] The invention relates to the field of polymer polymerization, in particular to a continuous bulk preparation method of acrylonitrile-EPDM-styrene resin. Background technique [0002] The terpolymer of acrylonitrile, EPDM rubber and styrene is abbreviated as AES, which is a newly developed engineering plastic. Due to the low content of double bonds in the molecular chain of EPDM, AES has excellent properties such as ozone aging resistance, ultraviolet aging resistance and aging yellowing resistance. Compared with ABS, its weather resistance has been improved. The improvement of AES is 4 to 8 times that of ABS, and the thermal stability and water absorption of AES are better than ABS resin, and other properties are similar to ABS. AES is especially suitable for the manufacture of automobile and motorcycle accessories, electrical and electronic, construction, lighting and other places that have high requirements on the weather resistance of the products....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/06C08F2/38C08F2/02
Inventor 傅建永沈曙光谢滨王国兵谢海洲周文斌邱琪浩
Owner ZHEJIANG OCEANKING DEVELOPMENT CO LTD
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