Back to results
US 12,221,545 B2Granted
Liquid lignin composition comprising lignin, water, alkali and urea
AssigneeStora Enso OYJ
InventorsAshar Zafar, Jesper Ekström, Dimitri Areskogh
Life of this patent
Estimating the term…
Abstract
The present invention relates to a liquid lignin composition, particularly useful in the manufacture of resins for products such as insulation, laminates and engineered wood products such as oriented strand boards (OSB). The liquid lignin composition has a low viscosity even at low water content.
Claims14
A liquid lignin composition comprising:
- 20-45% wt-% water,
- 30-40 wt-% lignin,
- 0.5-11 wt-% of a group 1 alkali metal hydroxide, and
- 1-20 wt-% urea.
1 more element
A method according to 5, wherein the liquid lignin composition is reacted with phenol and other components to prepare a resin.
Dependencies are inferred from the claim text.