Low haze polyimide film
US11104801B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2019 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Feb 15, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In a first aspect, a low haze polyimide film includes, a dianhydride, a diamine, and a color-tuning compound. The low haze polyimide film has a thickness in a range of from 1 to 150 um, an a* closer to zero with a |Δa*| greater than 0.2 and a b* that is at most 0.2 further away from zero, or a b* closer to zero with a |Δb*| greater than 0.2 and an a* that is at most 0.2 further away from zero, when compared to a low haze polyimide film of the same dianhydride and diamine composition, but without the color-tuning compound, and a haze of less than 4%. In a second aspect, an electronic device includes the low haze polyimide film of the first aspect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.