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Method for preparing high-quality polyisobutene

A polyisobutylene, high-quality technology, applied in the field of preparing high molecular polymers, can solve the problems of long purification time, low production efficiency and high energy consumption, and achieve the effects of shortening purification time, ideal purification effect and high purification efficiency

Pending Publication Date: 2022-04-19
ZHEJIANG CENWAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing method of purifying polyisobutylene can only heat the polymer on the surface, so it can only remove the impurities on the surface of the polymer, and the removal effect on the impurities inside the polymer is not good
In addition, there are disadvantages such as long purification time, low production efficiency, high impurity content, and high energy consumption.

Method used

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  • Method for preparing high-quality polyisobutene
  • Method for preparing high-quality polyisobutene
  • Method for preparing high-quality polyisobutene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Such as Figure 1-4 Shown, a kind of method for preparing high-quality polyisobutylene comprises the following steps:

[0034] 1) Add water to the polyisobutene to be treated, wherein the amount of water added per 1 kg of polyisobutene is 0.1 g; the polyisobutene to be treated is polyisobutene generated by polymerization.

[0035] 2) The polyisobutene added with water is passed into the degassing kettle 1, and after the volatile phase is removed, the state of the polyisobutene becomes viscous liquid;

[0036] 3) Pass the polyisobutene into the microwave heating chamber 2, scrape the polyisobutene into flakes by the scraper 3, start the microwave heater 4, and obtain the purified polyisobutene after removing the volatile phase.

[0037] In step 3), the polyisobutylene is fed into the microwave heating chamber 2 through the feed pipe 5 of the microwave heating chamber 2, and the polyisobutylene is scraped into flakes by the scraper 3. After starting the microwave heater ...

Embodiment 2

[0043] Such as Figure 1-4 Shown, a kind of method for preparing high-quality polyisobutylene comprises the following steps:

[0044] 1) Add water to the polyisobutene to be treated, wherein the amount of water added per 1 kg of polyisobutene is 2 grams;

[0045] 2) The polyisobutene added with water is passed into the degassing kettle 1, and after the volatile phase is removed, the state of the polyisobutene becomes viscous liquid;

[0046] 3) Pass the polyisobutene into the microwave heating chamber 2, scrape the polyisobutene into flakes by the scraper 3, start the microwave heater 4, and obtain the purified polyisobutene after removing the volatile phase.

[0047] In step 3), the polyisobutylene is fed into the microwave heating chamber 2 through the feed pipe 5 of the microwave heating chamber 2, and the polyisobutylene is scraped into flakes by the scraper 3. After starting the microwave heater 4, the microwave heating chamber is The polyisobutene scraped into flakes i...

Embodiment 3

[0053] Such as Figure 1-4 Shown, a kind of method for preparing high-quality polyisobutylene comprises the following steps:

[0054] 1) Add water to the polyisobutene to be treated, wherein the amount of water added per 1 kg of polyisobutene is 5 grams;

[0055] 2) The polyisobutene added with water is passed into the degassing kettle 1, and after the volatile phase is removed, the state of the polyisobutene becomes viscous liquid;

[0056] 3) Pass the polyisobutene into the microwave heating chamber 2, scrape the polyisobutene into flakes by the scraper 3, start the microwave heater 4, and obtain the purified polyisobutene after removing the volatile phase.

[0057] In step 3), the polyisobutylene is fed into the microwave heating chamber 2 through the feed pipe 5 of the microwave heating chamber 2, and the polyisobutylene is scraped into flakes by the scraper 3. After starting the microwave heater 4, the microwave heating chamber is The polyisobutene scraped into flakes i...

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Abstract

The invention provides a method for preparing high-quality polyisobutene, and belongs to the technical field of preparation of high-molecular polymers. The method comprises the following steps: 1) adding water into polyisobutene to be treated; 2) introducing polyisobutene into a degassing kettle to prepare a viscous liquid; and 3) introducing the mixture into a microwave heating chamber, performing microwave heating after scraping, and removing a volatile phase to obtain the polyisobutene with the impurity content of less than 0.5%. According to the invention, after water is added into the system, water as a non-polar molecule has a rotation spectrum and can effectively absorb a microwave band, so that volatilization of n-hexane and isobutene in polyisobutene is promoted; impurities in polyisobutene are effectively removed, the purification effect is more ideal, the purification time of isobutene is shortened, and the purification efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of preparing high molecular polymers, and relates to a method for preparing high-quality polyisobutylene. Background technique [0002] Polyisobutylene is a polymer produced by normal ionization polymerization of isobutylene, and its molecular weight can range from hundreds to millions. It is a typical saturated linear polymer. The main body of the molecular chain does not contain double bonds, and there is no long branched chain, and its structural unit is -(CH 2 -C(CH 3 ) 2 )-, wherein there is no asymmetric carbon atom, and the structural units are connected in a regular sequence from head to tail. Generally, low molecular weight polyisobutene and medium molecular weight polyisobutene can be used as oil additives, adhesives, sealants, coatings, lubricants, plasticizers and cable impregnants. High-molecular-weight polyisobutylene is used as an impact-modifying additive for plastics, raw rubber, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F6/00C08L23/22
CPCC08F6/008C08F6/001C08L23/22
Inventor 彭照亮叶媛园周勤卫张学琪惠毅陈萍超周文祥
Owner ZHEJIANG CENWAY MATERIALS CO LTD
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