Polyester film comprising a polymeric phosphonate flame retardant
US11634548B2 · kind B2 · utility
0Cited by
6References
25Claims
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Key dates
| Filing date | Apr 26, 2019 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | Apr 26, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A polyester film comprising a polymeric phosphonate flame retardant in an amount of from about 1.0 to about 25.0 wt % by total weight of the film and further comprising at least one metal cation selected from the group consisting of Group I and Group II metal cations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.