	US 11,987,733 B2
	Acrylic adhesive composition, polarizing plate, and display device
Min Ki Lee, Daejeon (KR); Kee Young Kim, Daejeon (KR); and Dong Jo Ryu, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/438,704
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Sep. 24, 2020, PCT No. PCT/KR2020/012969 § 371(c)(1), (2) Date Sep. 13, 2021, PCT Pub. No. WO2021/060876, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 10-2019-0120028 (KR), filed on Sep. 27, 2019.
Prior Publication US 2022/0154042 A1, May 19, 2022
Int. Cl. C09J 4/06 (2006.01); C08F 2/48 (2006.01); C08F 220/18 (2006.01); C08K 5/06 (2006.01); C08K 5/3492 (2006.01); C08K 5/5397 (2006.01); C08K 5/544 (2006.01)

CPC C09J 4/06 (2013.01) [C08F 2/48 (2013.01); C08F 220/1804 (2020.02); C08K 5/06 (2013.01); C08K 5/34924 (2013.01); C08K 5/5397 (2013.01); C08K 5/544 (2013.01); C09J 2203/318 (2013.01); Y10T 428/2891 (2015.01)]

17 Claims

1. An acrylic adhesive composition comprising:

an acrylic copolymer formed by polymerizing a monomer mixture including a monomer represented by [Formula 1] below, a (meth)acrylic monomer having a crosslinkable functional group, and an alkyl (meth)acrylate-based monomer, and having a branched polymer structure;

a polyfunctional acrylate having two or more radically polymerizable functional groups;

a first photoinitiator; and

a second photoinitiator,

wherein the first photoinitiator is an acetophenone-based photoinitiator, and the second photoinitiator is a phosphine oxide-based photoinitiator:

R¹—CH═CR²—(C═O)—O—X—Y [Formula 1]

wherein, R¹is hydrogen, a C1-C6 alkyl group, or a C2-C6 alkenyl group, R²is hydrogen or a C1-C10 alkyl group, X is a single bond, a C1-C10 alkylene group, a C2-C10 alkenylene group, ether, ester, or a combination thereof, and Y is a vinyl group, an allyl group, or a C3-C10 cycloalkenyl group.