Open cell rigid isocyanurate foams and method for producing the same and vacuum heat insulating layer by use of the same
US5260344A · kind A · utility
13Cited by
14References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1992 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | Mar 13, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rigid isocyanurate foams having a substantially open cell structure are prepared by foaming a mixture of an organic polyisocyanate and a polyol having a NCO/OH equivalent ratio of 3.5 to 13.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.