US 11,725,126 B2
Multilayer adhesive tape
Jae Sung Hong, Daejeon (KR); Dong Hoon Lim, Daejeon (KR); Ju Yong Seo, Daejeon (KR); Jun Man Choi, Daejeon (KR); Woo Yeon Kim, Daejeon (KR); Ho Kyung Song, Daejeon (KR); Jang Soon Kim, Daejeon (KR); Sle Lee, Daejeon (KR); and Kwang Su Seo, Daejeon (KR)
Assigned to Koza Novel Materials Korea Co., Ltd.
Appl. No. 16/603,429
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed May 18, 2018, PCT No. PCT/KR2018/005713
§ 371(c)(1), (2) Date Oct. 7, 2019,
PCT Pub. No. WO2018/216968, PCT Pub. Date Nov. 29, 2018.
Claims priority of application No. 10-2017-0062846 (KR), filed on May 22, 2017.
Prior Publication US 2020/0147939 A1, May 14, 2020
Int. Cl. C09J 133/26 (2006.01); C09J 133/08 (2006.01); C09J 133/14 (2006.01); C09J 7/10 (2018.01); C09J 7/50 (2018.01); C09J 133/06 (2006.01)
CPC C09J 133/26 (2013.01) [C09J 7/10 (2018.01); C09J 7/50 (2018.01); C09J 133/064 (2013.01); C09J 133/08 (2013.01); C09J 133/14 (2013.01); C09J 2203/318 (2013.01); C09J 2301/208 (2020.08); C09J 2301/312 (2020.08); C09J 2433/00 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A multilayer adhesive tape sequentially comprising:
a first outer adhesive layer;
an intermediate adhesive layer; and
a second outer adhesive layer,
wherein the intermediate adhesive layer comprises an intermediate adhesive polymer comprising: a polymerization unit of an alkyl group-containing (meth)acrylate monomer; a polymerization unit of a carboxyl group-containing monomer; and a polymerization unit of an acrylamide-based monomer,
wherein a glass transition temperature of the intermediate adhesive layer is higher than a glass transition temperature of each of the first and second outer adhesive layers,
wherein a difference in the glass transition temperature between each of the first outer adhesive layer and the second outer adhesive layer and the intermediate adhesive layer is from 5° C. to 25° C., and
wherein the first outer adhesive layer and the second outer adhesive layer each comprise an outer adhesive polymer comprising: a polymerization unit of a heterocycloalkyl group-containing (meth)acrylate monomer selected from the group consisting of tetrahydrofurfuryl acrylate (THFA), tetrahydrofurfuryl methacrylate, tetrahydropyranyl acrylate (THPA), or cyclictrimethylol-propaneformalacrylate (CTFA), and a polymerization unit of a crosslinkable monomer.