US 11,697,749 B2
Multilayer adhesive tape
Sle Lee, Daejeon (KR); Ho Kyung Song, Daejeon (KR); Jae Sung Hong, Daejeon (KR); Jun Man Choi, Daejeon (KR); and Jang Soon Kim, Daejeon (KR)
Assigned to Koza Novel Materials Korea Co., Ltd.
Appl. No. 16/760,814
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Nov. 2, 2018, PCT No. PCT/KR2018/013244
§ 371(c)(1), (2) Date Apr. 30, 2020,
PCT Pub. No. WO2019/088752, PCT Pub. Date May 9, 2019.
Claims priority of application No. 10-2017-0146213 (KR), filed on Nov. 3, 2017.
Prior Publication US 2021/0079269 A1, Mar. 18, 2021
Int. Cl. C09J 7/30 (2018.01); C09J 7/10 (2018.01); C09J 133/08 (2006.01); C09J 133/10 (2006.01); C08F 220/30 (2006.01); C08F 2/50 (2006.01)
CPC C09J 7/30 (2018.01) [C08F 2/50 (2013.01); C08F 220/301 (2020.02); C09J 7/10 (2018.01); C09J 133/08 (2013.01); C09J 133/10 (2013.01); B32B 2405/00 (2013.01); B32B 2457/20 (2013.01); B32B 2457/202 (2013.01); C09J 2203/318 (2013.01); C09J 2203/326 (2013.01); C09J 2301/208 (2020.08); C09J 2433/00 (2013.01); C09K 2323/05 (2020.08); C09K 2323/057 (2020.08)] 15 Claims
OG exemplary drawing
 
1. A multilayer adhesive tape sequentially comprising:
a first outer adhesive layer;
a second outer adhesive layer;
an intermediate adhesive layer;
a first interface mixed layer provided between the first outer adhesive layer and the intermediate adhesive layer; and
a second interface mixed layer between the second outer adhesive layer and the intermediate adhesive layer,
wherein the first interface mixed layer comprises materials from the first outer adhesive layer and the intermediate adhesive layer,
wherein at least one of the first outer adhesive layer or the second outer adhesive layer includes a cured product of an outer adhesive composition including a high molecular weight prepolymer having a weight average molecular weight of 100,000 g/mol or more and 1,500,000 g/mol or less and a low molecular weight prepolymer having a weight average molecular weight of 1,000 g/mol or more and 80,000 g/mol or less, wherein the low molecular weight prepolymer includes a polymerized unit of a cycloalkyl group-containing (meth)acrylate monomer and the content of the polymerized unit of the cycloalkyl group-containing (meth)acrylate monomer is 50 parts by weight or more and 90 parts by weight or less with respect to 100 parts by weight of total polymerized units of the low molecular weight prepolymer.