Flame-retardant flexible polyurethane foam
US8058322B2 · kind B2 · utility
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3References
8Claims
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Key dates
| Filing date | May 30, 2006 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Mar 6, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2290/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A flexible polyurethane foam-forming composition and the flexible polyurethane foam obtained therefrom contain, as flame-retardant additive, a halogen-free phosphonate compound which is substantially unreactive for isocyanate, contains at least about 5 weight percent phosphorus, has an acid value of about 2 mg KOH/g or less, a volatility as measured by thermogravimetric analysis not exceeding a 5.0 percent weight loss at a temperature of about 150° C., and a weight average molecular weight of from about 200 to about 2000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.