Title:
PHOTOCHROMIC COMPOUND, PHOTOCHROMIC COMPOSITION, PHOTOCHROMIC ARTICLE, AND EYEGLASSES
Document Type and Number:
WIPO Patent Application WO/2023/145962
Kind Code:
A1
Abstract:
The present invention provides a photochromic compound expressed by general formula 1. In general formula 1, R represents an unsubstituted aliphatic monocycle having at most six carbon atoms (including the carbon atom at position 13 of the indeno-fused naphthopyran), and R1-R8, B, and B' each independently represent a hydrogen atom or a substituent group, with the caveat that at least one of R1-R8 represents an electron-withdrawing group.
Inventors:
KAWAKAMI HIRONORI (JP)
KOBAYASHI KEI (JP)
HIGUCHI TAKESHI (JP)
KOBAYASHI KEI (JP)
HIGUCHI TAKESHI (JP)
Application Number:
PCT/JP2023/003027
Publication Date:
August 03, 2023
Filing Date:
January 31, 2023
Export Citation:
Assignee:
HOYA LENS THAILAND LTD (TH)
KAWAKAMI HIRONORI (JP)
KOBAYASHI KEI (JP)
HIGUCHI TAKESHI (JP)
KAWAKAMI HIRONORI (JP)
KOBAYASHI KEI (JP)
HIGUCHI TAKESHI (JP)
International Classes:
C07D413/10; C07D311/04; C09B57/00; C09K9/02; G02C7/10
Domestic Patent References:
| WO2011034202A1 | 2011-03-24 | |||
| WO2011016582A1 | 2011-02-10 | |||
| WO2020203864A1 | 2020-10-08 | |||
| WO2012102409A1 | 2012-08-02 | |||
| WO1997048762A1 | 1997-12-24 | |||
| WO2022260167A1 | 2022-12-15 |
Foreign References:
| JP2005289807A | 2005-10-20 | |||
| JP2005187420A | 2005-07-14 | |||
| JP2014506247A | 2014-03-13 |
Attorney, Agent or Firm:
SIKS & CO. (JP)
Download PDF: