US 12,227,675 B2
UV curable composition, and UV curable sheet using same
Ryusuke Shimaguchi, Tokyo (JP)
Assigned to SOMAR CORPORATION, Tokyo (JP)
Appl. No. 17/764,156
Filed by SOMAR CORPORATION, Tokyo (JP)
PCT Filed Sep. 25, 2020, PCT No. PCT/JP2020/036206
§ 371(c)(1), (2) Date Mar. 25, 2022,
PCT Pub. No. WO2021/060446, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-177651 (JP), filed on Sep. 27, 2019.
Prior Publication US 2022/0325144 A1, Oct. 13, 2022
Int. Cl. C09J 109/06 (2006.01); C09J 7/10 (2018.01); C09J 7/38 (2018.01); C09J 109/00 (2006.01)
CPC C09J 109/06 (2013.01) [C09J 7/10 (2018.01); C09J 7/383 (2018.01); C09J 109/00 (2013.01); C09J 2301/408 (2020.08); C09J 2301/416 (2020.08); C09J 2409/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A UV curable sheet comprising an adhesive layer, which is formed from a UV curable adhesive composition comprising
a rubber component with a diene skeleton, a photopolymerization initiator and a crosslinker,
wherein the rubber component with the diene skeleton comprises a solid rubber component and a liquid rubber component at 25° C.,
the liquid rubber component contains a modified styrene-butadiene rubber, the modified styrene-butadiene rubber is a rubber modified with at least one selected from the group consisting of a carboxy group and an acid anhydride group, and
the crosslinker is a multi-functional (meth)acrylate,
wherein when a thickness of the sheet is 100 μm, a 90-degree peel strength based on JISK-6854 after irradiation of UV with a cumulative light amount of 1600 mJ/cm2 through a high-pressure mercury lamp at room temperature is 10 N/inch or more.