发明名称 |
Aromatic vinyl/isoprene block copolymer, process for the production thereof, and hardenable pressure-sensitive adhesive composition containing the same |
摘要 |
An aromatic vinyl compound-isoprene block copolymer composition comprising (i) 5-50 wt. % a branched copolymer of the formula: (A-B)nX wherein A is a polymer block of an aromatic vinyl monomer, B is a polymer block of isoprene, and X is a residue of a polyfunctional coupling agent, and (ii) 50-95 wt. % of a diblock copolymer of the formula: A-B wherein A and B are as defined above. This copolymer composition is produced by allowing an aromatic vinyl monomer to contact with an organic lithium initiator to prepare a polymer block A; incorporating isoprene thereto to prepare a diblock copolymer A-B; and then, adding a polyfunctional coupling agent to convert a part of the diblock copolymer A-B to the branched copolymer (A-B)nX. This block copolymer composition is useful for an adhesive or pressure sensitive adhesive composition.
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申请公布号 |
US6291583(B1) |
申请公布日期 |
2001.09.18 |
申请号 |
US19990297367 |
申请日期 |
1999.04.30 |
申请人 |
NIPPON ZEON CO., LTD. |
发明人 |
KOMATSUZAKI SHIGERU;TSUBAKI HIDEMI;MATSUBARA TETSUAKI |
分类号 |
C08F297/04;C08L53/02;C09J153/02;(IPC1-7):C08L53/02 |
主分类号 |
C08F297/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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