US 11,981,823 B2
Radiation-curable ink jet composition and ink jet method
Midori Sekine, Matsumoto (JP); Kyohei Tanaka, Matsumoto (JP); and Keitaro Nakano, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Jun. 16, 2020, as Appl. No. 16/902,376.
Claims priority of application No. 2019-111787 (JP), filed on Jun. 17, 2019.
Prior Publication US 2020/0392357 A1, Dec. 17, 2020
Int. Cl. C09D 11/101 (2014.01); B41J 2/21 (2006.01); B41M 5/00 (2006.01); B41M 7/00 (2006.01); C09D 11/037 (2014.01); C09D 11/107 (2014.01); C09D 11/322 (2014.01); C09D 11/38 (2014.01)
CPC C09D 11/101 (2013.01) [B41J 2/21 (2013.01); B41J 2/2107 (2013.01); B41M 5/0023 (2013.01); B41M 7/0081 (2013.01); C09D 11/037 (2013.01); C09D 11/107 (2013.01); C09D 11/322 (2013.01); C09D 11/38 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A radiation-curable ink jet composition comprising:
a polymerizable compound component including a monofunctional monomer component and a multifunctional monomer component;
a photopolymerization initiator; and
titanium oxide as a white color material, wherein
a content of the monofunctional monomer component is 90 mass % or more based on the total amount of the polymerizable compound component; and
a weighted average of glass transition temperatures of homopolymers of the respective polymerizable compounds is 48° C. or more and 65° C. or less when mass ratios of contents of the respective polymerizable compounds are weighted.