Alumina trihydrate as flame retardant agent for urethane-modified carbodiimide-isocyanurate foams
US4150207A · kind A · utility
4Cited by
16References
9Claims
0Family size
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Key dates
| Filing date | Jun 13, 1977 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Jun 13, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/906
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Urethane-modified carbodiimide-isocyanurate foams are prepared by catalytically condensing (a) an organic polyisocyanate with a polyol or (b) a quasi-prepolymer in the presence of a blowing agent and from 20 parts to 100 parts by weight of alumina trihydrate. The resulting foams are characterized by improved flame retardancy without loss in strength properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.