US 12,234,395 B2
Pressure-sensitive adhesive composition and pressure-sensitive adhesive tape
Weina Wang, Shanghai (CN); Lu Shen, Shanghai (CN); Yunshu Zhang, Shanghai (CN); Yu Che, Shanghai (CN); Panpan Lin, Shanghai (CN); Heng Liu, Shanghai (CN); Xiaohai Sheng, Shanghai (CN); Shupeng Wu, Suzhou (CN); and Xiangming Yang, Shanghai (CN)
Assigned to 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
Appl. No. 17/793,477
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Jan. 18, 2021, PCT No. PCT/IB2021/050360
§ 371(c)(1), (2) Date Jul. 18, 2022,
PCT Pub. No. WO2021/148931, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 202010073125.2 (CN), filed on Jan. 21, 2020.
Prior Publication US 2023/0084796 A1, Mar. 16, 2023
Int. Cl. B32B 41/00 (2006.01); C09J 7/24 (2018.01); C09J 7/38 (2018.01); C09J 7/40 (2018.01); C09J 11/06 (2006.01); C09J 133/10 (2006.01)
CPC C09J 7/385 (2018.01) [C09J 7/245 (2018.01); C09J 7/403 (2018.01); C09J 11/06 (2013.01); C09J 133/10 (2013.01); C09J 2301/122 (2020.08); C09J 2301/302 (2020.08); C09J 2301/312 (2020.08); C09J 2301/408 (2020.08); C09J 2301/41 (2020.08); C09J 2301/416 (2020.08)] 16 Claims
OG exemplary drawing
 
1. A pressure-sensitive adhesive composition, the pressure-sensitive adhesive composition consisting of:
an acrylic copolymer; and
a crosslinking agent, wherein
the acrylic copolymer is a reaction product of a mixture of the following monomers:
a first alkyl (meth) acrylate, an alkyl group in the first alkyl (meth) acrylate having
at least 6 carbon atoms;
a second alkyl (meth) acrylate, an alkyl group in the second alkyl (meth) acrylate having 1 to 5 carbon atoms; and
a vinyl carboxylic acid, the weight ratio of the vinyl carboxylic acid to the mixture being 4% to 5%; wherein in the mixture, the weight ratio of the first alkyl (meth) acrylate to the second alkyl (meth) acrylate is between 0.99:1 and 1:0.97;
the crosslinking agent is an organometallic chelating agent, the weight ratio of the organometallic chelating agent to the mixture being 0.05% to 0.25%, wherein the pressure-sensitive adhesive composition does not contain an effective amount of a tackifier.