发明公开
- 专利标题: Photochromic composition
- 专利标题(中): 光泽Zusammensetzung
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申请号: EP99304776.0申请日: 1999-06-18
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公开(公告)号: EP0965628A1公开(公告)日: 1999-12-22
- 发明人: Nagoh, Hironobu , Momoda, Junji , Kawabata, Yuichiro
- 申请人: TOKUYAMA CORPORATION
- 申请人地址: 1-1, Mikage-cho Tokuyama-shi, Yamaguchi-ken 745-0053 JP
- 专利权人: TOKUYAMA CORPORATION
- 当前专利权人: TOKUYAMA CORPORATION
- 当前专利权人地址: 1-1, Mikage-cho Tokuyama-shi, Yamaguchi-ken 745-0053 JP
- 代理机构: Cresswell, Thomas Anthony
- 优先权: JP17183898 19980618
- 主分类号: C09K9/02
- IPC分类号: C09K9/02 ; G03C1/73 ; G02C7/10
摘要:
A photochromic composition which develops a neutral tint such as grey, green, brown or amber upon the irradiation with light including ultraviolet rays such as sunlight starting from the initial colorless state, maintaining a homogeneous color tone in the transient stage of developing color. The photochromic composition comprises 100 parts by weight of a fulgimide compound and/or a fulgide compound, and from 10 to 300 parts by weight of a chromene compound having a molar extinction coefficient of not smaller than 150 L/mol-cm for light of a wavelength of 400 nm.
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