公开(公告)号：US20210003867A1

公开(公告)日：2021-01-07

申请号：US16982725

申请日：2019-03-19

Applicant: TOKUYAMA CORPORATION

Inventor： Junji TAKENAKA ,  Junji MOMODA ,  Yoshihiro ASAHARA ,  Takashi TAMUKAI

IPC: G02C7/10 ,  G02B1/04 ,  G02B1/10 ,  B05D3/06 ,  B05D5/06

Abstract: A method of producing a plastic lens having a cured coating layer, comprising the steps of: forming an uncured coating layer from a photocurable coating composition comprising at least a) a photochromic compound, b) a radically polymerizable monomer and c) a photopolymerization initiator on one surface of a plastic lens; and irradiating the plastic lens having the uncured coating layer with light from an LED having an emission peak wavelength of 350 nm or more to less than 450 nm from above the outer surface of the uncured coating layer to cure the uncured coating layer.

公开(公告)号：US20220234072A1

公开(公告)日：2022-07-28

申请号：US17627237

申请日：2020-07-17

Applicant: TOKUYAMA CORPORATION

Inventor： Toshimitsu HIRAREN ,  Yoshihiro ASAHARA ,  Takashi TAMUKAI

IPC: B05D1/40 ,  B05D3/00 ,  B05D3/12 ,  G02B1/14 ,  G02B1/11

Abstract: The present invention provides a coating method including: a step of supplying a coating agent to a surface of a lens base material; a spreading step of spreading the coating agent supplied to the surface by rotation of the lens base material; a first removal step of removing at least a part of a liquid pool of the coating agent generated on a peripheral edge portion and/or a side surface portion of the lens base material by rotation of the lens base material after the spreading step; and a second removal step of removing the liquid pool remaining on the peripheral edge portion and/or the side surface portion of the lens base material by bringing an adsorption member into contact with at least the side surface of the lens base material after the first removal step. According to the present invention, it is possible to provide a coating method capable of obtaining a base material having a coating layer excellent in uniformity of film thickness by reducing the liquid pool of the coating agent generated on the peripheral edge portion and/or the side surface portion of the lens base material when the coating layer is formed on the surface of the base material by spin coating the coating agent.

公开(公告)号：US20180267207A1

公开(公告)日：2018-09-20

申请号：US15532887

申请日：2016-01-28

Applicant: TOKUYAMA CORPORATION

Inventor： Junji TAKENAKA ,  Junji MOMODA ,  Yoshihiro ASAHARA ,  Takashi TAMUKAI

IPC: G02B1/04 ,  B29C45/14 ,  G02C7/10 ,  G02C7/06

CPC classification number: G02B1/041 ,  B29C45/14336 ,  B29D11/00865 ,  B29K2105/0061 ,  B29L2011/0016 ,  G02C7/06 ,  G02C7/102

Abstract: A cured coating layer can be provided to plastic lenses having various shapes with high productivity without causing deformation by providing a plastic lens for light exposure having an uncured coating layer composed of a photocurable composition on one surface and hydrogel adhered to the other surface, curing the uncured coating layer by exposing the uncured coating layer to light, and removing the hydrogel.