Lignin-derived thermoplastic co-polymers and methods of preparation
US8748537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2013 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Oct 21, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/05
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a crosslinked lignin comprising a lignin structure having methylene or ethylene linking groups therein crosslinking between phenyl ring carbon atoms, wherein said crosslinked lignin is crosslinked to an extent that it has a number-average molecular weight of at least 10,000 g/mol, is melt-processible, and has either a glass transition temperature of at least 100° C., or is substantially soluble in a polar organic solvent or aqueous alkaline solution. Thermoplastic copolymers containing the crosslinked lignin are also described. Methods for producing the crosslinked lignin and thermoplastic copolymers are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.