	US 11,680,177 B2
	Ink composition
Naoki Koike, Matsumoto (JP); Toru Saito, Yamagata (JP); and Toshiyuki Yoda, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Feb. 27, 2020, as Appl. No. 16/802,980.
Claims priority of application No. JP2019-035563 (JP), filed on Feb. 28, 2019.
Prior Publication US 2020/0277504 A1, Sep. 3, 2020
Int. Cl. C09D 11/00 (2014.01); C09D 1/00 (2006.01); C08F 2/46 (2006.01); C08F 2/50 (2006.01); C08G 61/04 (2006.01); C09D 11/101 (2014.01); C09D 11/106 (2014.01); C08F 220/34 (2006.01); C08F 220/18 (2006.01); C08F 220/20 (2006.01); C08K 5/5397 (2006.01); C08F 226/06 (2006.01); C08F 236/02 (2006.01)

CPC C09D 11/101 (2013.01) [C08F 2/50 (2013.01); C08F 220/1806 (2020.02); C08F 220/1807 (2020.02); C08F 220/1811 (2020.02); C08F 220/20 (2013.01); C08F 220/343 (2020.02); C08F 226/06 (2013.01); C08F 236/02 (2013.01); C08K 5/5397 (2013.01); C09D 11/106 (2013.01)]

7 Claims

1. A radiation-curing ink jet ink composition comprising:

a urethane (meth)acrylate including one (meth)acryloyl group, an amount of the urethane (meth)acrylate being 5.0% by mass or more and 15% by mass or less of a total amount of the ink composition;

a (meth)acrylate including an aromatic ring and one (meth)acryloyl group, an amount of the (meth)acrylate being 4.0% by mass or more and 50.0% by mass or less of the total amount of the ink composition; and

a multifunctional (meth)acrylate, an amount of the multifunctional (meth)acrylate being 0% by mass or more and 5.0% by mass or less of the total amount of the ink composition,

wherein the urethane (meth)acrylate has a total number of carbon atoms of 2 to 15.