Fire retardant for isocyanate-based foams comprising ammonium sulfate and a cyanuric acid derivative
US4908161A · kind A · utility
6Cited by
10References
5Claims
0Family size
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Inventor
Key dates
| Filing date | Jun 23, 1988 |
| Grant date | Mar 13, 1990 |
| Priority date | — |
| Expiry date | Jun 23, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Ammonium sulfate powder is employed, alone, or in conjunction with a weakly basic powder to neuturalize the acidity of the sulfate, as a flame retardant for isocyanate-based foams and, in particular, rigid and flexible polyurethane foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.