Carbodiimide-isocyanurate foams modified with polyfurfuryl alcohol polymers
US4029611A · kind A · utility
7Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1975 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Dec 18, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rigid cellular foams are prepared by catalytically condensing an organic polyisocyanate in the presence of (a) a carbodiimide-promoting catalyst, (b) a trimerization catalyst, and (c) a polyfurfuryl alcohol polymer. The resulting foam compositions are characterized by carbodiimide and isocyanurate linkages and exhibit improved friability and flame retardancy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.