Invention Publication
- Patent Title: VEHICLE WIPER BLADE
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Application No.: US18158633Application Date: 2023-01-24
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Publication No.: US20230159692A1Publication Date: 2023-05-25
- Inventor: SHOTA SEGAWA , TAKEHIKO AOYAMA , MASANORI YOKOYAMA , HIDEKAZU MATSUDA , SYOJI INOUE , ARIHIRO YAMAMOTO , YOUHEI IKEDA
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Priority: JP 20130696 2020.07.31 JP 21112683 2021.07.07
- Main IPC: C08G18/66
- IPC: C08G18/66 ; B60S1/38 ; C08G18/76 ; C08G18/42 ; C08G18/10 ; C08G18/32

Abstract:
A vehicle wiper blade comprises a blade support part and a lip part coupled swingably with the blade support part via a neck. The lip part comprises polyurethane. The polyurethane comprises a reactant of a composition including an isocyanate compound which includes diisocyanate and tri- or higher functional polyfunctional isocyanate, and an alcohol which includes tri- or higher functional polyfunctional alcohol. The diisocyanate has an aromatic ring in a molecule. When a molecule of the polyurethane is ionized with a mass spectrometer of a direct sample injection system, then obtained M1, M2 and M3 satisfy the following relation: M2/M1 is 0.001 to 0.028, M3/M1 is 0.020 to 0.110, and M2/M3 is 0.013 to 0.300, and a concentration of the polyfunctional alcohol in the polyurethane is 0.12 mmol/g to 0.65 mmol/g.
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