Reactive flame retardants for polyurethane and polyisocyanurate foams
US10730995B2 · kind B2 · utility
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16References
15Claims
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Assignee
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Key dates
| Filing date | Nov 10, 2016 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Feb 8, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/162
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides novel cyclic phosphorus-containing compounds, namely hydroxyl-functional phospholene-1-oxides, serving as highly efficient reactive flame retardants in urethane systems, particularly in flexible polyurethane foams, semi-rigid and rigid polyurethane and polyisocyanurate foams. The invention further provides fire-retarded polyurethane compositions comprising said hydroxyl-functional phospholene-1-oxides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.