US 12,435,233 B2
Active energy ray curing composition, active energy ray curing ink composition, active energy ray curing inkjet ink composition, container, image forming device, image forming method, and cured matter
Soh Noguchi, Kanagawa (JP); Takashi Okada, Kanagawa (JP); and Masahide Kobayashi, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Soh Noguchi, Kanagawa (JP); Takashi Okada, Kanagawa (JP); and Masahide Kobayashi, Kanagawa (JP)
Filed on Jul. 1, 2022, as Appl. No. 17/810,384.
Claims priority of application No. 2021-111640 (JP), filed on Jul. 5, 2021; and application No. 2022-080782 (JP), filed on May 17, 2022.
Prior Publication US 2023/0018944 A1, Jan. 19, 2023
Int. Cl. C09D 11/38 (2014.01); B41M 5/00 (2006.01); B41M 7/00 (2006.01); C09D 11/101 (2014.01); C09D 11/107 (2014.01)
CPC C09D 11/38 (2013.01) [B41M 5/0023 (2013.01); B41M 7/0081 (2013.01); C09D 11/101 (2013.01); C09D 11/107 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An image forming method, comprising:
applying a second active energy ray curing composition to a cured matter of a first active energy ray curing composition, the second active energy ray curing composition comprising:
a monofunctional monomer;
a polyfunctional monomer; and
a photopolymerization initiator,
wherein a proportion of the polyfunctional monomer to the second active energy ray composition is 60 percent by mass or more,
wherein a polyfunctional monomer modified with a same number of an oxyalkylene group as a number of functional groups of the polyfunctional monomer accounts for 90 percent by mass or more of the polyfunctional monomer,
wherein a tri- or higher polyfunctional monomer accounts for 50 percent by mass or more of the polyfunctional monomer modified with a same number of an oxyalkylene group, and
wherein the first active energy ray curing composition comprises a monofunctional monomer, a polyfunctional monomer, a photopolymerization initiator, a polyester resin having an unsaturated bond, and at least one of a polymerizable tree-like branched compound or an allophanate-bond-containing compound.