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Preparation method of epoxy group-terminated styrene-butadiene-styrene (SBS) ternary block copolymer

An epoxy-terminated styrene and ternary block technology, which is applied in the field of preparation of end-group functional styrene-butadiene-styrene tertiary block copolymers, can solve the problem of unreported epoxy-terminated, inability to Then switch the brand, equipment pollution and other problems, to achieve the effect of superior performance, high end capping rate and low cost

Active Publication Date: 2016-01-13
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] These studies are based on the amination of linear SBS. The end-capping reagent and nitrogen lithium initiator used need to be synthesized and prepared, and the cost is high, and the aminated SBS will turn yellow after a long time, causing the device to be polluted and cannot be switched. Other grades
The epoxy group has stable chemical properties and is well compatible with other polar substances. It is often introduced into SBS by epoxidizing the double bond of SBS to increase the polarity of SBS. At this stage, no in-situ capping technology has been reported. Epoxy-terminated linear SBS

Method used

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  • Preparation method of epoxy group-terminated styrene-butadiene-styrene (SBS) ternary block copolymer
  • Preparation method of epoxy group-terminated styrene-butadiene-styrene (SBS) ternary block copolymer

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Experimental program
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Effect test

Embodiment 1

[0026] In a 10L polymerization kettle, 4.42kg of cyclohexane, 125g of styrene and tetrahydrofuran were injected with nitrogen pressure, and the molar ratio of tetrahydrofuran to effective n-butyllithium was 0.15. Heating to raise the temperature, adding n-butyllithium to break the impurity, when the system changes from colorless to pale yellow, the impurity in the system has been removed. Then add 3.6ml of effective n-butyllithium solution rapidly at 60°C, the molar concentration of n-butyllithium solution is 2.43mol / L, and initiate polymerization for 30min; In the polymerization kettle, react for 35min; press nitrogen into 125g styrene at the same temperature, continue to react for 30min, then add 1.4ml propylene oxide, react for 15min, then add 2ml epichlorohydrin, react for 15min, use 1.5ml ethanol Termination, adding 0.6% of anti-aging agent 2,6-di-tert-butyl p-cresol according to the mass of the final polymerization product. After the polymerization is completed, the rea...

Embodiment 2

[0030]In a 10L polymerization kettle, 4.42kg of cyclohexane, 125g of styrene and tetrahydrofuran were injected with nitrogen pressure, and the molar ratio of tetrahydrofuran to effective lithium was 0.2. Heating to raise the temperature, adding n-butyllithium to break the impurity, when the system changes from colorless to pale yellow, the impurity in the system has been removed. Then add 4.1ml of effective n-butyllithium solution rapidly at 60°C, the molar concentration of n-butyllithium solution is 2.43mol / L, and initiate polymerization for 30min; In the polymerization kettle, react for 25min; press nitrogen into 125g styrene at the same temperature, continue to react for 30min, then add 1.5ml propylene oxide, react for 15 minutes, then add 2.2ml epichlorohydrin, react for 15min, use 1.6 ml of ethanol to terminate, add anti-aging agent 2,6-di-tert-butyl p-cresol with a mass percentage of 0.3% based on the mass of the final polymerization product. After the polymerization is...

Embodiment 3

[0032] In a 10L polymerization kettle, 4.42kg of cyclohexane, 125g of styrene and tetrahydrofuran were injected with nitrogen pressure, and the molar ratio of tetrahydrofuran to effective lithium was 0.15. Heating to raise the temperature, adding n-butyllithium to break the impurity, when the system changes from colorless to pale yellow, the impurity in the system has been removed. Then add 3.2ml of effective n-butyllithium solution rapidly at 60°C, the molar concentration of n-butyllithium solution is 2.43mol / L, and initiate polymerization for 30min; In the polymerization kettle, react for 35 minutes; pressurize 125g styrene with nitrogen at the same temperature, continue to react for 30 minutes, then add 1.3ml propylene oxide, react for 15 minutes, then add 2ml epichlorohydrin, react for 10min, use 1.5ml Ethanol is terminated, and the amount of 1% anti-aging agent 2,6-di-tert-butyl-p-cresol is added according to the mass of the final polymerization product. After the polyme...

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Abstract

The invention discloses a preparation method of an epoxy group-terminated styrene-butadiene-styrene (SBS) ternary block copolymer. A SBS ternary block copolymer is synthesized by a lithium initiator anion solution polymerization technology and a three-step feeding method, after the third-stage reaction, an alkylene oxide compound is used so that carbanion activity is reduced, then epoxy alkylogen is added into a reaction system, the mixed reaction system undergoes a reaction, after the reaction, an antiager is added into the reaction product, and a solvent in the reaction system is removed so that the epoxy group-terminated SBS ternary block copolymer is obtained. The preparation method does not change the existing SBS production technology, has a high ending ratio, has simple processes and a low cost and can be industrialized easily.

Description

technical field [0001] The present invention relates to a method for preparing a terminal functional group styrene-butadiene-styrene ternary block copolymer, in particular to a method for preparing an epoxy-terminated styrene-butadiene-styrene ternary block copolymer . Background technique [0002] Styrene-butadiene-styrene triblock copolymer (SBS) is industrially prepared by anionic polymerization method. Because of its characteristics of both plastic and rubber, it belongs to thermoplastic elastomer and has been widely used in shoe sole materials. , Adhesives, asphalt modification, plastic modification and other fields. However, it is a non-polar material, and its application in some fields is limited. For example, when used as an asphalt modifier, due to the large difference in chemical properties, structure, composition and relative molecular weight between SBS and asphalt, and asphalt has a certain polarity, its compatibility with asphalt is poor, resulting in poor th...

Claims

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Application Information

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IPC IPC(8): C08F297/04C08F8/00
Inventor 李静静许晋国倪春霞梁伟强杨文锋何荣庆梁志斌王碧琼蔡伟钟向宏
Owner CHINA PETROLEUM & CHEM CORP
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