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Application filed by Chi Mei CorpfiledCriticalChi Mei Corp
Priority to TW094103330ApriorityCriticalpatent/TW200628497A/en
Publication of TW200628497ApublicationCriticalpatent/TW200628497A/en
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Publication of TWI300069BpublicationCriticalpatent/TWI300069B/zh
The present invention relates to a block polymer of conjugated diene compounds/vinyl aromatic compounds, wherein the ratio of vinyl aromatic polymerized units and conjugated diene polymerized units is 65~95 wt.%/ 35~5 wt.%. The block copolymers are obtained by coupling the mixture of following three active block polymers in the presence of a coupling agent. The three active block polymers are S1-B1-S2-S3-B2-S4-Y, S2-S3-B2-S4-Y, and S3-B2-S4-Y. The -Y is a terminal having anion activity and represents -B3 or -B3-B5. The S1~S5 represents polyvinyl aromatic block. The B1~B3 represents poly-conjugated diene block. The poly-conjugated diene block B1 is 1~5wt.% in the whole block copolymer composed of vinyl aromatic polymerized units and conjugated diene polymerized units.