Photo-alignment copolymer, optical anistropic film and its preparation method
US9720136B2 · kind B2 · utility
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21Claims
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Key dates
| Filing date | Aug 27, 2013 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Aug 27, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/303
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a photo-alignment copolymer which enables the formation of an optical anisotropic film that exhibits superior optical anisotropy, an optical anisotropic film using the photo-alignment copolymer and a method of manufacturing the optical anisotropic film. The photo-alignment copolymer includes both of a photo-alignment repeating unit having a photo-reactive functional group such as a cinnamate-based functional group, a chalcone-based functional group, an azo-based functional group or a coumarin-based functional group, and a repeating unit having a specific structure able to increase optical anisotropy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.