US 12,319,839 B2
Coating composition for optical article, spectacle lens, spectacles, and method for producing spectacle lens, and optical article and method for producing optical article
Takuya Shimada, Tokyo (JP); and Teruo Yamashita, Tokyo (JP)
Assigned to HOYA LENS THAILAND LTD., Pathumthani (TH)
Appl. No. 17/442,809
Filed by HOYA LENS THAILAND LTD., Pathumthani (TH)
PCT Filed Mar. 27, 2020, PCT No. PCT/JP2020/014264
§ 371(c)(1), (2) Date Sep. 24, 2021,
PCT Pub. No. WO2020/203865, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-067814 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0186043 A1, Jun. 16, 2022
Int. Cl. C09D 4/00 (2006.01); C08F 222/10 (2006.01); C09D 5/29 (2006.01); C09D 135/02 (2006.01); G02B 1/111 (2015.01); G02C 7/10 (2006.01)
CPC C09D 5/29 (2013.01) [C08F 222/1063 (2020.02); C09D 4/00 (2013.01); C09D 135/02 (2013.01); G02B 1/111 (2013.01); G02C 7/102 (2013.01); C08F 2800/20 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A spectacle lens comprising:
a lens substrate; and
a photochromic layer formed by curing a coating composition for an optical article, wherein:
the coating composition for the optical article comprises:
a photochromic compound; and
(meth)acrylates, wherein the (meth)acrylates consist of the following components (a), (b) and (c):
(a) polyethylene glycol dimethacrylate having a molecular weight of 600 or more,
(b) trimethylolpropane tri(meth)acrylate, and
(c) neopentyl glycol di(meth)acrylate,
the coating composition contains the component (a) in an amount of 60 mass % or more relative to a total amount of the (meth)acrylates, and
the coating composition contains the component (b) in an amount of 20 mass % or less relative to a total amount of the (meth)acrylates.