US 12,338,372 B2
Green, safe and environmentally-friendly process and production equipment for industrialized continuous large-scale production of formaldehyde-free water-based adhesive
Lefu Xie, Weihai (CN); Junqiang Shao, Weihai (CN); Xiaoliang Miao, Weihai (CN); Xiaomin Liu, Weihai (CN); Fei Cong, Weihai (CN); Jianmin Zhou, Weihai (CN); and Weijie Zhao, Weihai (CN)
Assigned to New Era Chemical Shan Dong Co., Ltd., Weihai (CN); and Weihai New Era New Material Co., Ltd., Weihai (CN)
Filed by New Era Chemical Shan Dong Co., Ltd., Weihai (CN); and Weihai New Era New Material Co., Ltd., Weihai (CN)
Filed on Oct. 26, 2022, as Appl. No. 18/049,739.
Prior Publication US 2023/0138786 A1, May 4, 2023
Int. Cl. C09J 135/00 (2006.01); C08F 2/01 (2006.01); C08F 2/06 (2006.01); C08F 2/38 (2006.01); C08F 22/06 (2006.01)
CPC C09J 135/00 (2013.01) [C08F 2/01 (2013.01); C08F 2/06 (2013.01); C08F 2/38 (2013.01); C08F 22/06 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A green, safe and environmentally-friendly production process of a formaldehyde-free water-based adhesive, comprising:
performing a polymerization reaction on a monomer having a carbon-carbon unsaturated double bond and an acid anhydride group and at least one other monomer containing a carbon-carbon unsaturated double bond that serve as raw materials in the presence of a solvent and an initiator; and
performing solid-liquid separation on a polymerization reaction solution under the action of a high-temperature inert carrier gas, vaporizing, condensing, and recovering the solvent for indiscriminate use in polymerization reaction, and performing a gas-solid reaction on the solid material serving as a polymer intermediate and a mixed gas of ammonia gas and air to obtain a solid formaldehyde-free water-based adhesive product.