US 12,291,648 B2
Energy ray-curable resin compositions and its cured products
Terunobu Saitoh, Tokyo (JP); and Kenichi Kanai, Chiba (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 8, 2021, as Appl. No. 17/469,182.
Claims priority of application No. 2020-152638 (JP), filed on Sep. 11, 2020; application No. 2020-153327 (JP), filed on Sep. 11, 2020; and application No. 2021-138345 (JP), filed on Aug. 26, 2021.
Prior Publication US 2022/0081571 A1, Mar. 17, 2022
Int. Cl. B29C 64/124 (2017.01); B29C 64/35 (2017.01); B33Y 10/00 (2015.01); B33Y 40/20 (2020.01); B33Y 70/00 (2020.01); C08F 220/18 (2006.01); C08F 220/28 (2006.01); C09D 4/00 (2006.01); C09D 133/06 (2006.01); C09D 133/14 (2006.01); B29K 105/00 (2006.01)
CPC C09D 4/00 (2013.01) [B29C 64/124 (2017.08); B29C 64/35 (2017.08); B33Y 10/00 (2014.12); B33Y 40/20 (2020.01); B33Y 70/00 (2014.12); C08F 220/1805 (2020.02); C08F 220/1806 (2020.02); C08F 220/1811 (2020.02); C08F 220/282 (2020.02); C09D 133/062 (2013.01); C09D 133/14 (2013.01); B29K 2105/0085 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A photocurable composition comprising curable materials formed of monofunctional (meth) acrylates each having a molecular weight of 150 or more and less than 350, and a bifunctional (meth) acrylate having a molecular weight of 200 or more and less than 400,
wherein the content of the monofunctional (meth) acrylates is 60 mol % or more and 75 mol % or less of the curable materials:
the monofunctional (meth) acrylates are formed of a monofunctional (meth) acrylate having an alicyclic skeleton and having quaternary carbon, and a monofunctional (meth) acrylate having a branched alkyl chain structure having 15 to 20 carbon atoms,
the monofunctional (meth) acrylate having the alicyclic skeleton and having the quaternary carbon is selected from the group consisting of isobornyl acrylate, 3,3,5-trimethylcyclohexanol acrylate, and 4-tert-butylcyclohexanol acrylate,
the monofunctional (meth) acrylate having the branched alkyl chain structure having 15 to 20 carbon atoms is isostearyl acrylate,
the bifunctional (meth) acrylate having a molecular weight of 200 or more and less than 400 is selected from the group consisting of diethylene glycol dimethacrylate, tricyclodecanol acrylate, 2-[5-ethyl-5-[(acryloyloxy) methyl]-1,3-dioxan-2-yl]-2,2-dimethylethyl acrylate, neopentyl glycol diacrylate, and 1,9-nonanediol diacrylate, and
a content of the monofunctional (meth)acrylate having an alicyclic skeleton and having quaternary carbon is larger than a content of the monofunctional (meth) acrylate having the branched alkyl chain structure.