Thermoplastic lignin condensation polymer, and preparation method therefor
US9346904B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Sep 6, 2013 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Sep 6, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/742
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a thermoplastic lignin polycondensate. The thermoplastic lignin polycondensate produces no fumes and odor even at a normal melt processing temperature. The melt viscosity of the thermoplastic lignin polycondensate can be measured even when heated to 200° C. or more. The thermoplastic lignin polycondensate can be prepared by selectively activating the hydroxyl reactive groups of lignin to suppress the crosslinking reaction of the hydroxyl reactive groups, which allows a linear or grafted linear growth of the lignin polycondensate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.