US 12,338,373 B2
Pressure-sensitive adhesive composition
Han Na Chi, Daejeon (KR); Su Jeong Kim, Daejeon (KR); Sang Ha Son, Daejeon (KR); Chang Hwan Ju, Daejeon (KR); Geun Ho Park, Daejeon (KR); Seong In Jo, Daejeon (KR); and Sung Soo Yoon, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/258,976
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jul. 25, 2019, PCT No. PCT/KR2019/009239
§ 371(c)(1), (2) Date Jan. 8, 2021,
PCT Pub. No. WO2020/022804, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 10-2018-0086332 (KR), filed on Jul. 25, 2018.
Prior Publication US 2021/0163800 A1, Jun. 3, 2021
Int. Cl. C09J 153/00 (2006.01); C09J 7/20 (2018.01); G02B 5/30 (2006.01)
CPC C09J 153/00 (2013.01) [C09J 7/20 (2018.01); G02B 5/305 (2013.01); C09J 2301/312 (2020.08)] 16 Claims
OG exemplary drawing
 
1. A pressure-sensitive adhesive composition comprising:
a block copolymer including
a first block having a glass transition temperature of 50° C. or more and having a cross-linkable functional group;
a second block having a glass transition temperature of −10° C. or less; and
an epoxysilane compound,
wherein a refractive index (R.I.1) of the first block and a refractive index (R.I.2) of the second block are calculated through Equation and satisfy Relational Expression:
R.I.=Σ{Rn×(Wn/100)}  [Equation]
wherein, R.I. is a refractive index of the first block or the second block, Wn/100 is a weight fraction of each of a monomer component used to form the first block or the second block, and Rn is a refractive index of a homopolymer of the monomer;
|ΔR.I.|=|R.I.1−R.I.2|<0.011  [Relational Expression]
wherein, ΔR.I. is an absolute value of a difference between the refractive index (R.I.1) of the first block and the refractive index (R.I.2) of the second block, and
wherein the second block comprises two or more polymerized units derived from two or more different compounds of Formula 1, respectively, capable of providing cross-linkable functional groups:

OG Complex Work Unit Chemistry
wherein, Q is hydrogen or an alkyl group, A and B are each independently an alkylene group, and n is an integer in a range of 0 to 10,
wherein the two or more polymerized units comprise a polymerized unit derived from a monomer (M1) and a polymerized unit derived from a monomer (M2), wherein a carbon number of A, a carbon number of B, or a carbon number combining the carbon numbers of A and B in the monomer (M1) is larger than a carbon number of A, a carbon number of B or a carbon number combining the carbon numbers of A and B in the monomer (M2), and the monomer (M1) is included in a lesser amount than the monomer (M2), and
wherein the second block comprises the polymerized unit derived from 0.5 to 5 parts by weight of the monomer (M1) and the polymerized unit derived from 1 to 10 parts by weight of the monomer (M2), and a weight ratio of the monomer (M2) and the monomer (M1) is at least 2:1.