Poly(amide-imide) copolymer composition and colorless and transparent poly(amide-imide) film comprising the same
US11248090B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Apr 10, 2018 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Apr 10, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2379/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A poly(amide-imide) copolymer composition comprising an imide of a polyamic acid and an ultraviolet stabilizer, and a colorless and transparent poly(amide-imide) film including the composition. The poly(amide-imide) copolymer composition according to the present disclosure makes it possible to provide a poly(amide-imide) film exhibiting excellent scratch resistance, UV shielding property, and UV weather resistance while being colorless and transparent. This film can be suitably used as a cover film of various flexible or foldable devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.