Laminated film, and composition for preparing same
US11851540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2020 |
| Grant date | Dec 26, 2023 |
| Priority date | — |
| Expiry date | Jan 16, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2379/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A laminated film which includes a first layer including a poly(amide-imide) copolymer, and a second layer laminated on at least one surface of the first layer. The second layer includes a poly(amide-imide) copolymer, polyimide, or a combination thereof, which has an amide content of less than or equal to about 30 mol %. The poly(amide-imide) copolymer included in the first layer has a weight average molecular weight of about 30,000 grams/mole to about 200,000 grams/mole, and the polyimide, the poly(amide-imide) copolymer, or the combination thereof, of the second layer has a weight average molecular weight of about 10,000 grams/mole to about 50,000 grams/mole, and the composition for preparing the laminated film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.