Manufacture of novolacs and resoles using lignin
US11697703B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Sep 25, 2020 |
| Grant date | Jul 11, 2023 |
| Priority date | — |
| Expiry date | Sep 25, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08H8/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Processes for manufacturing novolacs and resoles from lignin are disclosed. A phenol-aldehyde-lignin dispersion is formed which can then be used to make either a novolac or a resole, depending upon the catalysts used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.