Highly flame resistant rigid urethane-isocyanurate foam compositions
US4521547A · kind A · utility
8Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 4, 1984 |
| Grant date | Jun 4, 1985 |
| Priority date | — |
| Expiry date | Jan 4, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/4225
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Highly flame resistant rigid urethane-isocyanurate foams which meet the German B-1 rating are prepared from compositions containing blowing agent, polyester polyol derived from the residue of dimethyl terephthalate or terephthalic acid production, a phosphorus containing polyol and an isocyanurate catalyst, in which the NCO:OH ratio is 3 to 6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.