Process of the preparation of modified polyisocyanurate foams for heat insulation materials
US5627220A · kind A · utility
3Cited by
14References
11Claims
0Family size
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Key dates
| Filing date | Jun 22, 1995 |
| Grant date | May 6, 1997 |
| Priority date | — |
| Expiry date | Jun 22, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process of the preparation of the modified polyisocyanurate foams provided by a reaction of a polyisocyanate with a polyol composition mixture comprising a polyol, water, a trimerization catalyst, a carbodiimide catalyst, and an aromatic compound used as a chain extender. An amount of the aromatic compound used in the preparation is 0.5 to 10.0% by weight with respect to a total weight of the polyisocyanate and the polyol mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.