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
CN105801784AActive Publication Date: 2016-07-27CHINA PETROLEUM & CHEM CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2016-07-27

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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.
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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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