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
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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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