Invention Grant
- Patent Title: Tetra-block copolymer, and polymer composition, and hot-melt sticky adhesive composition using these
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Application No.: US16971683Application Date: 2019-02-20
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Publication No.: US11440987B2Publication Date: 2022-09-13
- Inventor: Leo Tsunoi , Ryoji Oda , Sadaharu Hashimoto
- Applicant: ZEON CORPORATION
- Applicant Address: JP Tokyo
- Assignee: ZEON CORPORATION
- Current Assignee: ZEON CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Kenja IP Law PC
- Priority: JPJP2018-033166 20180227
- International Application: PCT/JP2019/006276 WO 20190220
- International Announcement: WO2019/167745 WO 20190906
- Main IPC: C08F297/04
- IPC: C08F297/04 ; C09J7/35 ; C09J7/21 ; C08L53/02 ; C09J153/02
Abstract:
A tetrablock copolymer having an aromatic vinyl block (A1), a conjugated diene block (B1), an aromatic vinyl block (A2), and a conjugated diene block (B2) is provided, wherein Mw(A2)/Mw(A1) is 1.2 to 5, Mw(A2) is 12,000 or more, Mw(B1)>Mw(B2), Mw(Total) is 50,000 to 400,000 where the weight average molecular weight of the aromatic vinyl block (A1) is defined as Mw(A1), the weight average molecular weight of the conjugated diene block (B1) is defined as Mw(B1), the weight average molecular weight of the aromatic vinyl block (A2) is defined as Mw(A2), the weight average molecular weight of the conjugated diene block (B2) is defined as Mw(B2), and the weight average molecular weight of the tetrablock copolymer as a whole is defined as Mw(Total), and the content of aromatic vinyl monomer units is 10 to 30% by weight.
Information query
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