Polyolefin photovoltaic backsheet comprising a stabilized polypropylene layer
US11898023B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Dec 22, 2020 |
| Grant date | Feb 13, 2024 |
| Priority date | — |
| Expiry date | May 23, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyolefin photovoltaic (PV) backsheets comprise a polypropylene layer stabilized with (A) at least one hindered amine with 2,2,6,6-tetraalkylpiperdine or 2,2,6,6 -tetraakylpiperazinone, either or both in combination with a triazine moiety, (B) a thioester, and, optionally, (C) at least one hindered hydroxybenzoate, and/or (D) an ortho hydroxyl triazine compound. These PV backsheets exhibit a low flame spread index of <100 without the use of FR agents, and the polypropylene layer exhibits good weatherability while providing the required long term heat aging performance necessary for PV modules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.