Opaque fluoropolymer composition comprising white pigments for photovoltaic elements of solar cells
US9006565B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2009 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Sep 11, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3154
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A fluoropolymer composition having a total luminous transmittance (TT) of less than 15%, when measured according to ASTM D1003 on a sample having a thickness of about 50 μm, said composition comprising: at least one hydrogen-containing fluoropolymer [polymer (A)]; from 5 to 80% by weight of (A) of at least one inorganic pigment [pigment (I)]; and from 1 to 99% by weight of (I) of at least one per(halo)fluoropolymer chosen among tetrafluoroethylene (TFE) copolymers having a dynamic viscosity at a shear rate of 1 rad×sec−1 of less than 100 Pa×sec at a temperature of 280° C. [polymer (B)]. By adding polymer (B) to the composition based on polymer (A) it is advantageously possible to obtain an even dispersion of the pigment (I) so that a composition possessing outstanding opacity and still being processable under the form of films, so as to provide adequate mechanical properties, can be manufactured therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.