公开(公告)号：US20250101294A1

公开(公告)日：2025-03-27

申请号：US18730613

申请日：2023-01-13

Applicant: TOKUYAMA CORPORATION

Inventor： Masayuki MIYAZAKI ,  Srinivas VENU ,  Katsuhiro MORI

IPC: C09K9/02 ,  C07C39/42 ,  C07C43/23 ,  C07C217/78 ,  C07C323/21 ,  C07D311/94 ,  C07D317/70 ,  C07D327/04 ,  C07D493/04 ,  C07D497/04 ,  C08K5/1545 ,  C08K5/1565 ,  C08K5/357 ,  C09B57/02 ,  G02B1/04 ,  G02C7/10

Abstract: The purpose of the present invention is to provide: a photochromic compound having an excellent color fading rate and excellent durability; a naphthol derivative that can become an intermediate for the photochromic compound; and a curable composition, an optical article, a lens and eyeglasses each containing the photochromic compound. According to embodiments, a photochromic compound having a backbone represented by formula (1) is provided. In formula (1), M represents C, Si or Ge; R1 represents a haloalkyl group having 1 to 20 carbon atoms inclusive; R2 represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms inclusive or a substituted or unsubstituted haloalkyl group having 1 to 20 carbon atoms inclusive.

公开(公告)号：US20230133211A1

公开(公告)日：2023-05-04

申请号：US17798597

申请日：2021-02-18

Applicant: TOKUYAMA CORPORATION

Inventor： Masayuki MIYAZAKI ,  Junji TAKENAKA ,  Junji MOMODA ,  Srinivas VENU ,  Katsuhiro MORI

IPC: C07D493/10 ,  C08K5/159 ,  C07F7/18 ,  C08K5/549

Abstract: The photochromic cyclic compound of the present invention is represented by Formula (1) below: in the formula, L is a divalent bridging group and PC is a divalent T-type photochromic basic structural group having a naphthopyran structure, where one end of the bridging group L is bonded to at least the 3-position of the naphthopyran structure.

公开(公告)号：US20230242808A1

公开(公告)日：2023-08-03

申请号：US17768762

申请日：2020-10-14

Applicant: TOKUYAMA CORPORATION

Inventor： Masayuki MIYAZAKI ,  Junji TAKENAKA ,  Srinivas VENU ,  Junji MOMODA ,  Katsuhiro MORI

IPC: C09K9/02 ,  C09D4/06 ,  C09D7/63 ,  C07D497/10 ,  C07D311/96 ,  C07F7/08 ,  G02B1/04 ,  G02B1/10 ,  G02B5/23

CPC classification number: C09K9/02 ,  C09D4/06 ,  C09D7/63 ,  C07D497/10 ,  C07D311/96 ,  C07F7/0812 ,  G02B1/041 ,  G02B1/10 ,  G02B5/23 ,  C09K2211/1018 ,  C08K5/46

Abstract: A photochromic compound of the present invention comprises at least two monovalent photochromic basic structure groups PC including a T-type photochromic moiety, the photochromic basic structure groups being bonded to an organic group having a non-SO aromatic ring containing neither a sulfur atom nor an oxygen atom.