	US 11,981,838 B2
	Adhesive formulation comprising lignin
Ben Nasli Bakir, Saltsjö-Boo (SE); Ashar Zafar, Älta (SE); and Jesper Ekström, Johanneshov (SE)
Assigned to Stora Enso OYJ, Helsinki (FI)
Appl. No. 17/048,715
Filed by Stora Enso OYJ, Helsinki (FI)
PCT Filed Apr. 16, 2019, PCT No. PCT/IB2019/053100 § 371(c)(1), (2) Date Oct. 19, 2020, PCT Pub. No. WO2019/202478, PCT Pub. Date Oct. 24, 2019.
Claims priority of application No. 1850470-4 (SE), filed on Apr. 20, 2018.
Prior Publication US 2021/0238464 A1, Aug. 5, 2021
Int. Cl. C09J 197/00 (2006.01); C08H 7/00 (2011.01); C08L 97/02 (2006.01); C09J 161/06 (2006.01)

CPC C09J 197/005 (2013.01) [C08H 6/00 (2013.01); C08L 97/02 (2013.01); C09J 161/06 (2013.01)]

12 Claims

1. An adhesive formulation comprising:

lignin generated in the Kraft process, provided in a form of a solution, wherein the solution comprises alkali in an amount of 3 to 15% by weight and lignin in an amount between 33 to 45% by weight;

methanol, in an amount between 5 to 30% by weight; and,

resole phenol-formaldehyde resin,

wherein the adhesive formulation comprises at least two resins, a first resin comprising the resole phenol-formaldehyde resin and a second resin comprising a lignin-phenol-formaldehyde resin.