US 12,391,849 B2
Encapsulation film
Eun Gu Han, Daejeon (KR); So Young Kim, Daejeon (KR); Seung Min Lee, Daejeon (KR); and Se Woo Yang, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/434,665
Filed by LG CHEM, LTD, Seoul (KR)
PCT Filed Feb. 28, 2020, PCT No. PCT/KR2020/002899
§ 371(c)(1), (2) Date Aug. 27, 2021,
PCT Pub. No. WO2020/175958, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 10-2019-0024260 (KR), filed on Feb. 28, 2019.
Prior Publication US 2022/0154054 A1, May 19, 2022
Int. Cl. C09J 7/10 (2018.01); C09J 7/30 (2018.01); C09J 11/06 (2006.01); C09J 153/00 (2006.01); H10K 50/84 (2023.01); H10K 50/844 (2023.01); H10K 71/00 (2023.01); H10K 85/10 (2023.01)
CPC C09J 7/10 (2018.01) [C09J 7/30 (2018.01); C09J 11/06 (2013.01); C09J 153/00 (2013.01); H10K 50/844 (2023.02); H10K 71/00 (2023.02); H10K 85/111 (2023.02); H10K 85/151 (2023.02); C09J 2203/326 (2013.01); C09J 2301/208 (2020.08); C09J 2453/00 (2013.01); H10K 50/846 (2023.02)] 19 Claims
OG exemplary drawing
 
1. An encapsulation film comprising an encapsulation composition,
wherein the encapsulation composition comprises:
a block copolymer having a first block derived from a monomer having a glass transition temperature of 0° C. or higher, and
a multifunctional oligomer having a weight average molecular weight in a range of 1200 g/mol to 50,000 g/mol,
wherein the block copolymer and the multifunctional oligomer are included in the encapsulation composition in amounts of 30 to 90 parts by weight and 5 to 48 parts by weight, respectively,
wherein after the encapsulation film is stretched 200% (2 times the original length) in the longitudinal direction under conditions of a temperature of 25° C. and 60% relative humidity and left for 24 hours, the degree of restoration at the time of removing the stretched force and measuring the length after 1 hour is within 110% of the original length.