US 12,325,812 B2
Method for preparing lignin adhesive and product thereof
Chen Huang, Nanjing (CN); Fangmin Liang, Nanjing (CN); Xuelian Zhou, Nanjing (CN); Jinyuan Cheng, Nanjing (CN); Yunni Zhan, Nanjing (CN); Wencan Ma, Nanjing (CN); Xuze Liu, Nanjing (CN); Yongjun Deng, Nanjing (CN); and Guigan Fang, Nanjing (CN)
Assigned to INSTITUTE OF CHEMICAL INDUSTRY OF FOREST PRODUCTS, CAF, Nanjing (CN)
Appl. No. 18/839,741
Filed by INSTITUTE OF CHEMICAL INDUSTRY OF FOREST PRODUCTS, CAF, Nanjing (CN)
PCT Filed Jun. 9, 2023, PCT No. PCT/CN2023/099361
§ 371(c)(1), (2) Date Aug. 20, 2024,
PCT Pub. No. WO2023/246524, PCT Pub. Date Dec. 28, 2023.
Claims priority of application No. 202210733525.0 (CN), filed on Jun. 24, 2022.
Prior Publication US 2025/0109327 A1, Apr. 3, 2025
Int. Cl. C09J 197/00 (2006.01); C08H 3/00 (2006.01); C08H 7/00 (2011.01)
CPC C09J 197/005 (2013.01) [C08H 6/00 (2013.01)] 16 Claims
OG exemplary drawing
 
9. A lignin adhesive obtained by a method for preparing the lignin adhesive, the method comprising: treating a wood fiber raw material with a mixed solution; after the treatment, adding an organic solvent to perform a solid-liquid separation while stirring, subjecting an obtained liquid to a rotary evaporation to remove the organic solvent, and washing and drying a product to obtain the lignin adhesive; wherein the mixed solution is a homogeneous transparent liquid composed of a hydrogen bond receptor, a polyol, and an organic polyacid, and wherein the polyol is selected from 1, 2-butanediol, 1, 2-pentanediol, 1, 5-pentanediol, 1, 3-propanediol, 1, 4-butanediol.