US 12,331,142 B2
Maintenance liquid and maintenance method
Keitaro Nakano, Matsumoto (JP); Chigusa Sato, Shiojiri (JP); and Mitsuaki Yoshizawa, Minowa-machi (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Mar. 16, 2023, as Appl. No. 18/185,219.
Application 16/438,457 is a division of application No. 14/661,966, filed on Mar. 18, 2015, abandoned.
Application 18/185,219 is a continuation of application No. 17/087,741, filed on Nov. 3, 2020, granted, now 11,629,210.
Application 17/087,741 is a continuation of application No. 16/438,457, filed on Jun. 11, 2019, granted, now 10,858,614, issued on Dec. 8, 2020.
Claims priority of application No. 2014-057152 (JP), filed on Mar. 19, 2014.
Prior Publication US 2023/0242696 A1, Aug. 3, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 220/18 (2006.01); B41J 2/165 (2006.01); C08F 2/48 (2006.01); C08F 20/28 (2006.01); C08F 220/28 (2006.01); C08F 220/30 (2006.01); C08K 5/5397 (2006.01); C09D 11/101 (2014.01); C11D 3/36 (2006.01); C11D 3/37 (2006.01)
CPC C08F 220/1807 (2020.02) [B41J 2/16552 (2013.01); C08F 2/48 (2013.01); C08F 20/28 (2013.01); C08F 220/1808 (2020.02); C08F 220/1811 (2020.02); C08F 220/1812 (2020.02); C08F 220/301 (2020.02); C08F 220/302 (2020.02); C08K 5/5397 (2013.01); C09D 11/101 (2013.01); C11D 3/361 (2013.01); C11D 3/3757 (2013.01); C11D 3/3765 (2013.01); C08F 220/282 (2020.02); C11D 2111/14 (2024.01); C11D 2111/22 (2024.01)] 18 Claims
 
1. A maintenance method, comprising:
performing maintenance of a device by using a maintenance liquid including a polymerizable compound (A) in which a saturation solubility of an acyl phosphine oxide-based photopolymerization initiator at 20° C. is equal to or greater than 5.0% by mass,
wherein the device is equipped with a discharge head for discharging an ultraviolet ray curable-type composition toward an attachment object, and an ultraviolet ray emitting diode for irradiating the discharged ultraviolet ray curable-type composition with ultraviolet rays,
wherein the polymerizable compound (A) includes at least any one of vinyl ether group-containing (meth)acrylic acid ester represented by the following general formula (1) and a monofunctional (meth)acrylate compound having an aromatic ring CH2═CR1—COOR2—O—CH—CH—R3 (1),
wherein R1 represents a hydrogen atom or a methyl group, R2 represents a divalent organic residue having 2 to 20 carbon atoms, and R3 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms, and
wherein a content of the polymerizable compound (A) is equal to or less than 59.3% by mass with respect to the total amount of the maintenance liquid, the maintenance liquid further includes a polymerizable compound (B) in which a saturation solubility of an acyl phosphine oxide-based photopolymerization initiator at 20° C. is less than 5.0% by mass.