Process for the manufacture of a capacitor film
US10253115B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Aug 29, 2012 |
| Grant date | Apr 9, 2019 |
| Priority date | — |
| Expiry date | Oct 22, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Process for producing of a capacitor film comprising the steps of (a) polymerizing propylene in the presence of a catalyst comprising a solid catalyst system obtaining a polypropylene, (b) subjecting said polypropylene to a film forming process obtaining a capacitor film, wherein during the polymerization step (a) said catalyst comprising the solid catalyst system fragments into nanosized catalyst fragments being distributed in said polypropylene, said solid catalyst system comprises a transition metal, a metal which is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and an internal electron donor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.