Invention Grant
- Patent Title: Protective film and sheet
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Application No.: US17122804Application Date: 2020-12-15
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Publication No.: US12104043B2Publication Date: 2024-10-01
- Inventor: Toru Ookubo , Daisuke Murata
- Applicant: TOPPAN PRINTING CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: TOPPAN PRINTING CO., LTD.
- Current Assignee: TOPPAN PRINTING CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP 18118254 2018.06.21 JP 18118255 2018.06.21 JP 18118256 2018.06.21
- Main IPC: C08K5/3492
- IPC: C08K5/3492 ; C08J5/18 ; C08J7/04 ; C09D5/32 ; C09D175/04

Abstract:
A protective film that includes at least one of a transparent polyolefin resin layer and a surface protection layer, and that has excellent weather resistance and a low level of white turbidity, which is a factor that impairs design properties; and a sheet using the protective film. The protective film comprises at least a transparent polyolefin resin layer, wherein the transparent polyolefin resin layer contains a first hydroxyphenyltriazine-based ultraviolet absorber (UVA-A) having a structure represented by the general formula below. In the general formula, R1-R3 each independently represent a hydrogen atom, a methyl group, a phenyl group, or an alkoxy group, and at least two of R1-R3 are an alkoxy group having 8-18 carbon atoms, R4 and R5 each independently represent a hydroxyl group, a methyl group, or a hydrogen atom, and R6-R8 each independently represent a methyl group or a hydrogen atom.
Public/Granted literature
- US20210095096A1 PROTECTIVE FILM AND SHEET Public/Granted day:2021-04-01
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