Invention Grant
- Patent Title: Epoxy functional composition protecting dyes from photo-degradation and cured coatings prepared therefrom
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Application No.: US16463148Application Date: 2017-10-25
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Publication No.: US11214695B2Publication Date: 2022-01-04
- Inventor: Haipeng Zheng
- Applicant: Essilor International
- Applicant Address: FR Charenton-le-Pont
- Assignee: Essilor International
- Current Assignee: Essilor International
- Current Assignee Address: FR Charenton-le-Pont
- Agency: Norton Rose Fulbright US LLP
- Priority: EP16306547 20161123
- International Application: PCT/EP2017/077266 WO 20171025
- International Announcement: WO2018/095679 WO 20180531
- Main IPC: C09D5/32
- IPC: C09D5/32 ; C09D7/41 ; C09D163/00 ; G02C7/10 ; B29D11/00 ; C08K5/3415 ; C08K5/29

Abstract:
The present invention relates to an optical filtering coating composition, comprising at least one dye that at least partially inhibits transmission of light within the 400-500 nm wavelength range and has a conjugated chromophore, one or more epoxy compounds comprising at least one cycloaliphatic or aryl group, the ratio of the number of carbon atoms/the number of oxygen atoms in said epoxy compound being higher than or equal to 3, and the dry extract weight of such epoxy compounds present in the composition representing more than 33% of the dry extract weight of the composition. The coating composition can be applied on the main surface of the substrate of an optical article.
Information query
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