Polyetherimide miscible polymer blends for capacitor films
US10669388B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2015 |
| Grant date | Jun 2, 2020 |
| Priority date | — |
| Expiry date | Jul 2, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2479/08
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A uniaxially-stretched, high yield extruded capacitor film comprising a miscible polymer blend comprising a polyetherimide and a polyester, wherein the polyetherimide comprises units derived from polymerization of an aromatic dianhydride with a diamine comprising a m-phenylenediamine, a p-phenylenediamine, or combinations thereof, wherein the polyetherimide is endcapped with a substituted or unsubstituted aromatic primary monoamine, wherein the polyester comprises repeating structural units derived from polymerization of an aromatic dicarboxylic acid with a dihydroxy compound, and wherein the high yield extruded capacitor film comprises equal to or greater than about 90 wt. % of the miscible polymer blend entering an extruder used for manufacturing the capacitor film, based on the total weight of miscible polymer blend prior to entering the extruder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.