Polyamide-imide resin film
US11407858B2 · kind B2 · utility
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2References
16Claims
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Assignee
Inventors
Key dates
| Filing date | Dec 7, 2018 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Sep 19, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2379/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a polyamide-imide resin film having a low birefringence index, including: a polyamide-imide block copolymer containing an amide repeating unit to which an isophthaloyl group and an aromatic diamine residue are bonded; an imide repeating unit; and a trivalent functional group containing an aromatic tricarbonyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.