Bis-imine titanium complex, catalyst system comprising bis-imine titanium complex, and (co)polymerization method of conjugated diene

摘要

A bis-imine titanium complex having formula (I) is provided: In the formula (I): -R ₁ and R ₂ are the same as or different from each other, and represent a hydrogen atom; Linear or branched, optionally halogenated, C ₁ -C ₂₀ alkyl group, preferably C ₁ -C ₁₅ , selected from optionally substituted cycloalkyl groups; -R ₃ and R ₄ are the same as or different from each other, and represent a hydrogen atom; A linear or branched, optionally halogenated, C ₁ -C ₂₀ alkyl group, preferably C ₁ -C ₁₅ , optionally substituted cycloalkyl group, optionally substituted aryl group; -X ₁ , X ₂ , X ₃ and X ₄ are the same as or different from each other, and represent halogen atoms such as chlorine, bromine, and iodine; Linear or branched C ₁ -C ₂₀ alkyl group, preferably selected from C ₁ -C ₁₅ , -OCOR ₅ group or -OR ₅ group, where R ₅ is selected from linear or branched C ₁ -C ₂₀ alkyl group And is preferably C ₁ -C ₁₅ ; Or X ₁ , X ₂ , X ₃ and X ₄ represent an acetylacetonate group (acac); However, when R ₁ and R ₂ represent a methyl group and X ₁ , X ₂ , X ₃ and X ₄ represent a chlorine atom, R ₃ and R ₄ are different from 2,6-di-iso-propylphenyl.