Low smoke, halohydrocarbon-compatible urethane-isocyanurate foam compositions
US4469821A · kind A · utility
9Cited by
5References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1983 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Aug 17, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Compositions having improved compatibility of halohydrocarbon blowing agents such as trichlorofluoromethane and suitable for curing with polyisocyanates to give low smoke urethane isocyanate foams are described. The compositions include the transesterification products of the residue obtained from the manufacture of dimethyl terephthalate and ethylene glycol or a polyethylene glycol; the transesterification product of that residue and a higher alkylene glycol or higher polyalkylene glycol; and a polyether polyol having an average hydroxyl functionality of at least 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.