Urethane modified carbodiimide foams derived from flame retardant polyols
US3994839A · kind A · utility
12Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1974 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Oct 29, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/5075
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rigid cellular foams characterized by carbodiimide linkages are prepared by the catalytic condensation of an organic polyisocyanate in the presence of a halogen or phosphorus-containing active hydrogen compound to provide urethane modified foams having a skin of improved flame retardancy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.