- 专利标题: Styrenic Block Copolymers and Methods of Preparation Thereof
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申请号: US18172375申请日: 2023-02-22
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公开(公告)号: US20230265278A1公开(公告)日: 2023-08-24
- 发明人: Xavier D.D.J. Muyldermans , Julie Li
- 申请人: Kraton Corporation
- 申请人地址: US TX Houston
- 专利权人: Kraton Corporation
- 当前专利权人: Kraton Corporation
- 当前专利权人地址: US TX Houston
- 主分类号: C08L53/02
- IPC分类号: C08L53/02 ; C08F8/04 ; C08F12/08 ; C08F36/06
摘要:
A hydrogenated styrenic block copolymer (HSBC) is disclosed comprising, prior to hydrogenation, a polymer block A of at least one vinyl aromatic monomer, a polymer block B of at least one conjugated diene, and a copolymer block C of at least one vinyl aromatic monomer and 1,3-butadiene monomer. The HSBC has a total vinyl aromatic content of 15 to 60 wt. % and an aromatic blockiness index of 20 to 80%. The viscoelastic properties of HSBC show a value of a tan δ peak height of 0.7 to 2, a tan δ peak temperature of −40 to 25° C., and a temperature width value (in ° C.) at half the tan δ peak height of 17 to 40. The HSBC provides improved mechanical properties and can be used in preparation of adhesives and protective films applications.
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