Lignin-based polymers with enhanced melt extrusion ability
US11248121B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2019 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Jul 12, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L77/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A solid polymer blend material comprising: (i) lignin; and (ii) a polyamide having a melting point of no more than 240° C. and which is below the decomposition temperature of the lignin; wherein said lignin is homogeneously dispersed in said polyamide. Methods for producing the blend material are also described. Methods for producing objects made of the blend material by melt extrusion are also described, comprising: (a) melt blending components (i) and (ii) to form a polymer blend in which components (i) and (ii) are homogeneously blended, wherein the polymer blend exhibits a melt viscosity of no more than 2000 Pa·s at a shear rate of 100-1000 s−1 and when heated to a temperature of no more than 240° C.; and; (b) forming an object made of said polymer blend material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.