Linear functionalized SBS prepared from bifunctional coupling agent and process

A dual-functional group and coupling agent technology, applied in the field of linear functionalized SBS and its preparation process, can solve the problems of easy introduction of impurities, long reaction time, and many feeding times, and achieve easy industrialization, short polymerization time, and energy and material consumption. low effect

Active Publication Date: 2016-07-27
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned three-step method introduces functional groups at the end of SBS to prepare end-functionalized linear SBS. The steps are cumbersome, the process is complicated, the number of additions is large, impurities are easily introduced, the reaction is terminated, and the reaction time is long.

Method used

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  • Linear functionalized SBS prepared from bifunctional coupling agent and process
  • Linear functionalized SBS prepared from bifunctional coupling agent and process
  • Linear functionalized SBS prepared from bifunctional coupling agent and process

Examples

Experimental program
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Effect test

Embodiment 1

[0026] In a 10L polymerization kettle, 4.42kg of cyclohexane, 250g 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 5.2ml 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; add the coupling agent epichlorohydrin, the molar ratio of epichlorohydrin to butyllithium is 0.4, react for 15 minutes, terminate with 1.5ml ethanol, measure according to the mass of the final product of polymerization, and add a mass percentage of 0.6 % of anti-aging agents. The antioxidants are 2,6-di-tert-butyl-p-cresol and 2,2'-methylene-bis(4-methyl-6-tert-butylphe...

Embodiment 2

[0028] In a 10L polymerization kettle, 4.42kg of cyclohexane, 250g 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 5.2ml 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; add the coupling agent epichlorohydrin, the molar ratio of epichlorohydrin to butyllithium is 0.6, react for 15 minutes, terminate with 1.5ml ethanol, measure according to the mass of the final product of polymerization, and add a mass percentage of 0.6 % of anti-aging agents. Antiaging agent 2,6-di-tert-butyl-p-cresol and tert-butylcatechol. After the polymerization is...

Embodiment 3

[0032] In a 10L polymerization kettle, 4.42kg of cyclohexane, 250g 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 5.1ml of effective n-butyllithium solution quickly 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; add the coupling agent epichlorohydrin, the molar ratio of epichlorohydrin to butyllithium is 0.8, react for 15 minutes, terminate with 1.5ml ethanol, measure according to the mass of the final product of polymerization, and add a mass percentage of 0.6 % of anti-aging agents. The anti-aging agent is 2,6-di-tert-butyl-p-cresol and trinonylphenyl phosphite. After the pol...

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Abstract

The invention discloses a linear functionalized SBS prepared from a bifunctional coupling agent. The linear functionalized SBS is prepared by the following steps: (1) adding a hydrocarbon solvent, styrene and a polar additive into a reactor, stirring, heating to 30-60 DEG C, and adding an organic lithium initiator to carry out first-section polymerization reaction for 30-60 minutes; (2) adding butadiene to carry out second-section polymerization reaction for 20-60 minutes; (3) adding the bifunctional coupling agent to carry out coupling reaction for 2-30 minutes; and (4) after the reaction in the step (3) is finished, adding a terminating agent to terminate the reaction, adding an anti-aging agent, removing the hydrocarbon solvent, and drying, so as to obtain the styrene-butadiene-styrene segmented ternary copolymer with linear functional groups. The invention further discloses a preparation process of the linear functionalized SBS. The linear functionalized SBS has good compatibility with polar materials such as asphalt, and the preparation process is simple.

Description

technical field [0001] The invention relates to a linear functionalized SBS and a preparation process thereof, in particular to a linear functionalized SBS prepared by a bifunctional coupling agent and a process thereof. Background technique [0002] Styrene-butadiene-styrene block copolymer (SBS) is a thermoplastic elastomer produced by anionic polymerization. The preparation method has three-step method and coupling method. Due to its unique structure, it has both rubber and plastic. It has the elasticity of rubber at room temperature and can become a plastic material at high temperature. It has been widely used in various fields such as shoe sole materials, adhesives, asphalt modification, and plastic modification. [0003] However, SBS is a non-polar polymer, and its application is limited in some fields, such as modified asphalt. To achieve the best performance of polymer modified asphalt, the polymer must be uniformly dispersed and dissolved in the base asphalt. A hom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F297/04C08F8/08C08L95/00C08L53/02
CPCC08F8/08C08F297/04C08L95/00C08L53/025
Inventor 李静静钟向宏蔡伟倪春霞梁伟强杨文锋何荣庆梁志斌许晋国王碧琼朱大群刘慧宇
Owner CHINA PETROLEUM & CHEM CORP
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