US 12,275,877 B2
Pressure-sensitive adhesive tape
Daisuke Watanabe, Saitama (JP); Kota Suetsugu, Saitama (JP); Akira Yamakami, Saitama (JP); and Yumi Kagiyama, Saitama (JP)
Assigned to DIC Corporation, Tokyo (JP)
Filed by DIC Corporation, Tokyo (JP)
Filed on Jul. 20, 2022, as Appl. No. 17/869,211.
Application 17/869,211 is a continuation of application No. PCT/JP2021/000943, filed on Jan. 14, 2021.
Claims priority of application No. 2020-007907 (JP), filed on Jan. 21, 2020.
Prior Publication US 2022/0372341 A1, Nov. 24, 2022
Int. Cl. C09J 7/38 (2018.01); C09J 11/08 (2006.01); C09J 133/08 (2006.01); C09J 133/10 (2006.01); C09J 153/00 (2006.01)
CPC C09J 7/385 (2018.01) [C09J 11/08 (2013.01); C09J 133/08 (2013.01); C09J 133/10 (2013.01); C09J 153/00 (2013.01); C09J 2301/302 (2020.08); C09J 2301/408 (2020.08)] 11 Claims
 
1. An adhesive tape with an adhesive layer, the adhesive layer comprising:
filler particles; and
a triblock copolymer with a repeating unit represented by the following general formula (1):

OG Complex Work Unit Chemistry
wherein:
A, B, and C independently denote a repeating unit,
A and C independently denote an alkyl methacrylate monomer unit,
B denotes an alkyl acrylate monomer unit,
p, q, and r independently denote a degree of polymerization of monomer units respectively,
A and C are the same or denote an alkyl methacrylate monomer unit with a different chemical structure,
* denotes a bonding arm to another atom,
a relationship D50/T between an average particle size D50 of the filler particles and an average thickness T of the adhesive layer ranges from 0.05 to 1.0,
the adhesive tape is stretchable and peelable, and
the filler particles have a particle size distribution D90/D10 in a range of from 2.5 to 20.