Method for the preparation of a lignin prepolymer
US11643508B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2018 |
| Grant date | May 9, 2023 |
| Priority date | — |
| Expiry date | Oct 8, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a method for the preparation of a lignin prepolymer, comprising (a) providing a lignin; (b) reacting the lignin with a hydroxyl functionalization reagent to provide a lignin derivative containing at least one hydroxyl group, said hydroxyl group being obtained as a result of the interaction between the lignin and the hydroxyl functionalization reagent (c) reacting the lignin derivative obtained in step (b) with a functionalization reagent selected from the group consisting of fatty acids, fatty acid derivatives and mixtures thereof capable to react with the lignin derivative resulting in a covalent bond between the fatty acid and/or or the fatty acid derivative and the lignin derivative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.