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AssigneeTSRC Corporation
InventorsChun-Lin Chen, Yun-Ta Lee, Siang-Lin Tsai, Nai-Hao Hu, Qiwei Lu
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The present invention provides a copolymer of a conjugated diene and a vinyl aromatic hydrocarbon, and a method for preparing the same. The copolymer of the present invention comprises a homopolymeric segment composed of the conjugated diene, and a copolymeric segment composed of the conjugated diene and the vinyl aromatic hydrocarbon and connected to the homopolymeric segment. The copolymer has a first glass transition temperature between −10° C. and −50° C. and a second glass transition temperature between −45° C. and −85° C., the first glass transition temperature is higher than the second glass transition temperature and the content of vinyl aromatic hydrocarbon microblocks is 1.0% to 10.0% based on the total content of the vinyl aromatic hydrocarbon in the copolymer, wherein the vinyl aromatic hydrocarbon microblocks refer to those having at least four consecutive vinyl aromatic hydrocarbon units.
A copolymer of a conjugated diene and a vinyl aromatic hydrocarbon, comprising a homopolymeric segment composed of the conjugated diene and a copolymeric segment composed of the conjugated diene and the vinyl aromatic hydrocarbon, the copolymeric segment being connected to the homopolymeric segment, wherein the copolymer has a first glass transition temperature between −10° C. and −50° C. and a second glass transition temperature between −45° C. and −85° C., the first glass transition temperature being higher than the second glass transition temperature, and a vinyl aromatic hydrocarbon microblock content of the copolymer in an amount of 1.0% to 10.0% based on a total vinyl aromatic hydrocarbon content of the copolymer, wherein the vinyl aromatic hydrocarbon microblocks refer to those having at least four consecutive vinyl aromatic hydrocarbon units.
Dependencies are inferred from the claim text.