US 12,410,344 B2
Water-dispersed pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet
Amane Sawamura, Osaka (JP); Shuhei Yamamoto, Osaka (JP); Keisuke Shimokita, Osaka (JP); Hayata Matsumoto, Osaka (JP); and Yasuhito Inai, Osaka (JP)
Assigned to NITTO DENKO CORPORATION, Ibaraki (JP)
Filed by NITTO DENKO CORPORATION, Ibaraki (JP)
Filed on Jul. 15, 2022, as Appl. No. 17/865,857.
Claims priority of application No. 2021-130285 (JP), filed on Aug. 6, 2021; and application No. 2022-068622 (JP), filed on Apr. 19, 2022.
Prior Publication US 2023/0048315 A1, Feb. 16, 2023
Int. Cl. C09J 7/38 (2018.01); C08K 5/01 (2006.01); C08K 5/41 (2006.01); C08L 33/06 (2006.01); C08L 33/08 (2006.01); C09J 7/10 (2018.01); C09J 11/08 (2006.01); C09J 133/06 (2006.01); C09J 133/08 (2006.01)
CPC C09J 7/385 (2018.01) [C08K 5/01 (2013.01); C08K 5/41 (2013.01); C08L 33/064 (2013.01); C08L 33/08 (2013.01); C09J 7/10 (2018.01); C09J 11/08 (2013.01); C09J 133/064 (2013.01); C09J 133/08 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01); C09J 2301/302 (2020.08); C09J 2301/312 (2020.08); C09J 2433/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A water-dispersed pressure-sensitive adhesive composition comprising:
a water-dispersible polymer, a carboxylic acid copolymer thickener, a polyacrylic acid thickener, and water, wherein
a ratio of the carboxylic acid copolymer thickener in a solid content of the water-dispersed pressure-sensitive adhesive composition is 0.1% by mass or more and 0.9% by mass or less, and
a ratio of the polyacrylic acid thickener in the solid content is 1.8% by mass or more and 3.7% by mass or less.