	US 12,275,868 B2
	Surface protection film
So Jin Kim, Daejeon (KR); Hyun Cheol Kim, Daejeon (KR); Jeong Min Choi, Daejeon (KR); Sang Hwan Kim, Daejeon (KR); and Kwang Su Seo, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 17/628,512
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Nov. 20, 2020, PCT No. PCT/KR2020/016506 § 371(c)(1), (2) Date Jan. 19, 2022, PCT Pub. No. WO2021/101332, PCT Pub. Date May 27, 2021.
Claims priority of application No. 10-2019-0150453 (KR), filed on Nov. 21, 2019.
Prior Publication US 2022/0275260 A1, Sep. 1, 2022
Int. Cl. C09J 175/04 (2006.01); C09J 7/20 (2018.01); C09J 7/30 (2018.01); C09J 7/50 (2018.01); C09J 11/06 (2006.01)

CPC C09J 175/04 (2013.01) [C09J 7/20 (2018.01); C09J 7/30 (2018.01); C09J 7/50 (2018.01); C09J 11/06 (2013.01); C09J 2301/122 (2020.08); C09J 2301/312 (2020.08)]

13 Claims

1. A surface protective film comprising an adhesive layer provided on one surface of a substrate layer,

wherein the adhesive layer comprises a cured product of an adhesive composition containing: a urethane-based resin having a photoreactive group at an end or side chain thereof; a monofunctional (meth)acrylate monomer; a crosslinking agent having two or more photoreactive groups at an end thereof; a photoinitiator; and a photoreactive siloxane additive, the adhesive composition being solvent-free,

wherein the monofunctional (meth)acrylate monomer is contained in an amount of 50 parts by weight to 200 parts by weight based on 100 parts by weight of the urethane-based resin.