Process for the preparation of carbodiimide-isocyanurate foams employing quaternary boron salts as catalysts
US4151334A · kind A · utility
8Cited by
4References
14Claims
0Family size
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Key dates
| Filing date | Sep 16, 1977 |
| Grant date | Apr 24, 1979 |
| Priority date | — |
| Expiry date | Sep 16, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rigid foams characterized by carbodiimide and isocyanurate linkages are prepared by catalytically condensing an organic polyisocyanate in the presence of certain quaternary boron salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.