Rigid polyurethane foam and preparation method thereof
US10604615B2 · kind B2 · utility
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2References
13Claims
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Key dates
| Filing date | Nov 5, 2015 |
| Grant date | Mar 31, 2020 |
| Priority date | — |
| Expiry date | Nov 5, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A rigid polyurethane foam which is a polymerization product of a composition including a concentrated acid hydrolytic lignin, a polyol, and an isocyanate, and a method of preparing the rigid polyurethane foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.