Polyurethane-polyisocyanurate foam
US11584822B2 · kind B2 · utility
0Cited by
5References
11Claims
0Family size
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Key dates
| Filing date | Jun 3, 2019 |
| Grant date | Feb 21, 2023 |
| Priority date | — |
| Expiry date | Jun 12, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2115/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyurethane-polyisocyanurate foams are prepared using a polyether polyol made from an alkylene oxide mixture that contains a specified proportion of ethylene oxide. The selection of proper polyol equivalent weight and ethylene oxide content leads to the production of foams having a useful combination of properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.