Process for making low density flexible polyisocyanurate-polyurethane foams
US4981880A · kind A · utility
34Cited by
15References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1990 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | Jan 24, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Low density flexible molded and slabstock foams are prepared by reacting a polyisocyanate with a polyol composition containing a mono-alcohol. The blowing of the foam is essentially with carbon dioxide generated from the reaction of water with isocyanate, and the reaction catalysts used in the preparation of the foam include a polyisocyanate trimerization catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.