	US 11,938,734 B2
	Cleaning solution and inkjet printer cleaning method
Hirotoshi Takahashi, Tokyo (JP); Ha Sai, Tokyo (JP); and Toru Ishii, Tokyo (JP)
Assigned to NIPPON KAYAKU KABUSHIKI KAISHA, Tokyo (JP)
Appl. No. 17/310,510
Filed by Nippon Kayaku Kabushiki Kaisha, Tokyo (JP)
PCT Filed Feb. 4, 2020, PCT No. PCT/JP2020/004130 § 371(c)(1), (2) Date Aug. 6, 2021, PCT Pub. No. WO2020/175033, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 2019-032212 (JP), filed on Feb. 26, 2019; and application No. 2019-126603 (JP), filed on Jul. 8, 2019.
Prior Publication US 2022/0097376 A1, Mar. 31, 2022
Int. Cl. B41J 2/165 (2006.01); B41J 2/21 (2006.01); C11D 1/72 (2006.01); C11D 1/722 (2006.01); C11D 3/20 (2006.01); C11D 3/43 (2006.01); C11D 11/00 (2006.01)

CPC B41J 2/165 (2013.01) [B41J 2/16552 (2013.01); C11D 1/72 (2013.01); C11D 1/722 (2013.01); C11D 3/2068 (2013.01); C11D 3/43 (2013.01); C11D 11/0047 (2013.01); B41J 2/2114 (2013.01)]

8 Claims

1. A cleaning solution comprising:

a compound represented by the following formula (1):

R¹—O(EO)_m(PO)_nH (1)

wherein R¹represents a linear or branched C10 to C18 alkyl group, EO represents an ethyleneoxy group and PO represents a propyleneoxy group, an order in which EO and PO are bonded to each other is any order, m and n each independently represents an integer of 1 to 5, and a ratio of m and n, m:n, is 1:2 or more and less than 3:2,

a compound represented by the following formula (2):

R²—O(EO)_LH (2)

wherein R²represents a linear or branched C1 to C30 alkyl group or an aryl group, EO represents an ethyleneoxy group, and L represents an integer of 10 or more, and

water.