US 11,987,688 B2
Photocurable composition, a hydrogel and a molded product thereof
Ryosuke Yoshii, Annaka (JP); Kohei Masuda, Annaka (JP); Mamoru Hagiwara, Annaka (JP); and Tsuneo Kimura, Annaka (JP)
Assigned to Shin-Etsu Chemical Co., Ltd., Tokyo (JP)
Appl. No. 16/644,860
Filed by Shin-Etsu Chemical Co., Ltd., Tokyo (JP)
PCT Filed Aug. 21, 2018, PCT No. PCT/JP2018/030785
§ 371(c)(1), (2) Date Mar. 5, 2020,
PCT Pub. No. WO2019/049651, PCT Pub. Date Mar. 14, 2019.
Claims priority of application No. 2017-171959 (JP), filed on Sep. 7, 2017.
Prior Publication US 2021/0024719 A1, Jan. 28, 2021
Int. Cl. C08K 3/22 (2006.01); C08F 292/00 (2006.01); G02B 1/04 (2006.01); G02B 27/00 (2006.01); G02C 7/10 (2006.01)
CPC C08K 3/22 (2013.01) [C08F 292/00 (2013.01); G02B 1/043 (2013.01); G02B 27/0006 (2013.01); C08K 2003/2231 (2013.01); C08K 2003/2237 (2013.01); C08K 2003/2262 (2013.01); G02C 7/10 (2013.01)] 15 Claims
 
1. A photocurable composition comprising the following components (A) to (D),
(A) a monomer having one (meth)acryloyl structure,
(B) a crosslinking agent having two or more (meth)acryloyl structures in an amount of 0.1 to 10 parts by weight, relative to total 100 parts by weight of components (A) and (B),
(C) an inorganic ultraviolet-blocking agent having a 50% volume cumulative particle size of 1 to 50 nm in the particle size distribution as determined according to a dynamic light scattering method, wherein the inorganic ultraviolet-blocking agent has a core-shell structure composed of a core of a titanium oxide-containing metal oxide and a silicon oxide shell outside the core, in an amount of 0.5 to 10 parts by weight, relative to total 100 parts by weight of components (A) and (B), and
(D) a photopolymerization initiator in an amount of 0.05 to 1 part by weight, relative to total 100 parts by weight of components (A) and (B),
wherein a part or all of component (A) is a hydrophilic monomer, and a content of the hydrophilic monomer is 70% by weight or more, relative to the total weight of components (A) and (B).