Poly(amide-imide) copolymer film and method for preparing same
US11655323B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Dec 7, 2018 |
| Grant date | May 23, 2023 |
| Priority date | — |
| Expiry date | Mar 19, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to an aromatic poly(amide-imide) copolymer film having high retardation in the thickness direction and exhibiting a low moisture absorption rate, and a method for preparing the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.