	US 12,291,659 B2
	Two-pack urethane-based adhesive
Yuichi Matsuki, Hiratsuka (JP); Megumi Abe, Hiratsuka (JP); and Kazuki Miura, Hiratsuka (JP)
Assigned to SIKA TECHNOLOGY AG, Baar (CH)
Appl. No. 18/271,563
Filed by SIKA TECHNOLOGY AG, Baar (CH)
PCT Filed Dec. 14, 2021, PCT No. PCT/JP2021/045916 § 371(c)(1), (2) Date Jul. 10, 2023, PCT Pub. No. WO2022/153761, PCT Pub. Date Jul. 21, 2022.
Claims priority of application No. 2021-003983 (JP), filed on Jan. 14, 2021.
Prior Publication US 2024/0150615 A1, May 9, 2024
Int. Cl. C09J 4/00 (2006.01); C09J 11/04 (2006.01); C09J 11/08 (2006.01); C09J 175/04 (2006.01)

CPC C09J 4/00 (2013.01) [C09J 11/04 (2013.01); C09J 11/08 (2013.01); C09J 175/04 (2013.01)]

6 Claims

1. A two-pack urethane-based adhesive comprising:

a first-pack liquid including a urethane prepolymer having an isocyanate group; and

a second-pack liquid including water, an active hydrogen compound (except water) having an active hydrogen capable of reacting with the isocyanate group, and cellulose nanofibers,

wherein the first-pack liquid and the second-pack liquid each independently contain carbon black and/or an inorganic-based filler, and

the content of the cellulose nanofibers is 0.1-1.5 mass % with respect to the content of the water.