Method for preparing readily processable, thermally-stable, phosphorus-containing flame retardant material
US12152129B2 · kind B2 · utility
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21References
19Claims
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Key dates
| Filing date | Dec 18, 2019 |
| Grant date | Nov 26, 2024 |
| Priority date | — |
| Expiry date | Mar 15, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure provides for the production of non-halogenated phosphorus containing, thermally stable flame retardant materials directly in the form of a powder or small particles. The process generally includes heating one or more phosphonic acid salts in a high boiling, water miscible, acid stable solvent to dehydration reaction temperatures of 200° C. or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.