Lignin derivatives, moldings produced by using the derivative, and process for the preparation thereof
US6632931B1 · kind B1 · utility
Assignees
Inventor
Key dates
| Filing date | Jun 5, 2000 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Jun 5, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/582
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a process for producing novel lignin derivatives, which comprises using a lignophenol derivative containing a diphenylpropane unit formed by binding a carbon atom at an ortho-position relative to a phenolic hydroxyl group of a phenol derivative to a carbon atom at a benzyl-position of a phenylpropane fundamental unit of lignin, and binding an oxygen atom of the hydroxyl group and a &bgr;-positional carbon atom under alkali conditions under which the hydroxyl group can dissociate, to obtain an arylcoumaran derivative containing an arylcoumaran unit in which a coumaran skeleton is bound to an aromatic ring of lignin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.