Polycarbonate copolymer and associated film extrusion composition, extruded film, and capacitor
US11976195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2023 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Nov 10, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2483/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A composition includes specific amounts of a copolycarbonate and a roughening agent. The copolycarbonate contains first carbonate units derived from a first bisphenol monomer such that a homopolycarbonate of the first bisphenol monomer has a glass transition temperature less than 155° C., and second carbonate units derived from a second bisphenol monomer such that a homopolycarbonate of the second bisphenol monomer has a glass transition temperature of 155° C. or higher. The roughening agent includes a particulate crosslinked polymethylsilsesquioxane having a median equivalent spherical diameter greater than 5 micrometers and less than or equal to 10 micrometers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.