Invention Grant
- Patent Title: Photocurable composition
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Application No.: US17241738Application Date: 2021-04-27
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Publication No.: US11643480B2Publication Date: 2023-05-09
- Inventor: Kazuyuki Ueno , Yoshihide Arai , Takashi Nemoto
- Applicant: THREEBOND CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: THREEBOND CO., LTD.
- Current Assignee: THREEBOND CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Lucas & Mercanti, LLP
- Priority: JP 2020084884 2020.05.14
- Main IPC: C08F2/50
- IPC: C08F2/50 ; C08F290/06 ; C08J5/18

Abstract:
The present invention makes it possible to maintain a high 180-degree peel strength of a photocurable composition having a film shape at 25° C. in the state of not being cured against untreated PET as an adherend when bonding is performed by lamination at normal temperature.
A photocurable composition having a film shape at 25° C. in a state of not being cured, which contains the following components (A) to (C) and in which the photocurable composition contains 1 to 45 parts by mass of the component (B) with respect to 100 parts by mass of the component (A), a temperature of tan δ=1 is 30° C. to 60° C. before curing, a storage elastic modulus at 25° C. is 10.0×105 Pa or less after curing.
Component (A): urethane-modified (meth)acrylate oligomer
Component (B): film forming agent
Component (C): photoinitiator
A photocurable composition having a film shape at 25° C. in a state of not being cured, which contains the following components (A) to (C) and in which the photocurable composition contains 1 to 45 parts by mass of the component (B) with respect to 100 parts by mass of the component (A), a temperature of tan δ=1 is 30° C. to 60° C. before curing, a storage elastic modulus at 25° C. is 10.0×105 Pa or less after curing.
Component (A): urethane-modified (meth)acrylate oligomer
Component (B): film forming agent
Component (C): photoinitiator
Public/Granted literature
- US20210355251A1 PHOTOCURABLE COMPOSITION Public/Granted day:2021-11-18
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