Invention Publication
- Patent Title: POROUS FILM, SEPARATOR FOR SECONDARY BATTERY, AND SECONDARY BATTERY
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Application No.: US17926328Application Date: 2021-05-21
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Publication No.: US20230198097A1Publication Date: 2023-06-22
- Inventor: Nobuyasu Kai , Keiichi Kamon , Hiroko Tanaka , Akimitsu Tsukuda , Naoki Imazu
- Applicant: Toray Industries, Inc.
- Applicant Address: JP Tokyo
- Assignee: Toray Industries, Inc.
- Current Assignee: Toray Industries, Inc.
- Current Assignee Address: JP Tokyo
- Priority: JP 20089599 2020.05.22 JP 20198675 2020.11.30
- International Application: PCT/JP2021/019319 2021.05.21
- Date entered country: 2022-11-18
- Main IPC: H01M50/451
- IPC: H01M50/451 ; C08F20/18 ; C08L33/08 ; H01M50/426 ; H01M50/42 ; H01M50/431 ; H01M50/446 ; H01M50/489

Abstract:
A porous film includes a porous base and a porous layer containing particles A disposed at least on one side thereof, wherein the particles A contain a mixture including a polymer formed from a fluorine-containing (meth)acrylate monomer and a polymer formed from a (meth)acrylate monomer having a hydroxyl group or a copolymer including a fluorine-containing (meth)acrylate monomer and a (meth)acrylate monomer having a hydroxyl group, with the (meth)acrylate monomer having a hydroxyl group accounting for more than 2 mass% and 30 mass% or less of all components of the particles A, which account for 100 mass%.
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