Photochromic cyclic compound and curable composition containing said photochromic cyclic compound

By connecting the 3-position naphthalene benzyl skeleton with a specific bridge group to form a ring-like structure, the problem of the existing T-type photochromic agent reducing the chromaticity density under high temperature conditions is solved, and the effect of high chromaticity density and low temperature dependence is achieved.

JP7659537B2Active Publication Date: 2025-04-09TOKUYAMA CORP
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Patent Information

Application Number
JP2022501988
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-02-27
Filing Date
2021-02-18
Publication Date
2025-04-09
Estimated Expiration
2041-02-18

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Abstract

This photochromic cyclic compound is represented by formula (1). In the formula, L is a divalent bridging group and PC is a divalent T-type photochromic base structure group including a naphthopyran structure, one end of the bridging group L having been bonded at least to the 3-position of the naphthopyran structure.
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Citation Information

Patent Citations

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    JP1977046079A

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    JP1988066178A

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    JP1994199827A

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    JP1996217985A