Hard coating film and preparation method thereof
US11137524B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Dec 2, 2019 |
| Grant date | Oct 5, 2021 |
| Priority date | — |
| Expiry date | Dec 2, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a hard coating film including a polyamideimide substrate layer and a hard coating layer, each of which has a predetermined refractive index, with a difference in the refractive index between those layers being 0.05. The substrate layer has a tensile modulus of 3 to 7 GPa, at a thickness of 80 μm, as measured according to ASTM D111. The present invention relates to a hard coating film having improved mechanical and optical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.