Citation: Yu-Miao SU, Ting WANG, Yu-Lin DING, Jia-Jing HUANG, Wen-Mu LI. Preparation Technology of Solvent-free Polyurethane: A Mini-Review[J]. Chinese Journal of Structural Chemistry, ;2020, 39(12): 2057-2067. doi: 10.14102/j.cnki.0254–5861.2011–3020 shu

Preparation Technology of Solvent-free Polyurethane: A Mini-Review

Yu-Miao SU ^{a, b, d, &} ,
Ting WANG ^{a, b, &} ,
Yu-Lin DING ^{a, c} ,
Jia-Jing HUANG ^{a, c} ,
Wen-Mu LI ^a,,

a.
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
b.
University of Chinese Academy of Sciences, Beijing 100049, China
c.
Fujian Normal University, College of Chemistry and Material Science, Fuzhou, 350007, China
d.
Provincial Key Laboratory of Eco-Industrial Green Technology, Wuyi University 354300, China

Corresponding author: Wen-Mu LI, liwm@fjirsm.ac.cn
Received Date: 2 November 2020
Accepted Date: 19 November 2020

Fund Project: the Fujian STS plan supporting project 2019T3005the Fujian STS plan supporting project 2019T3014the Fujian STS plan supporting project 2019T3034Key deployment project of the Chinese Academy of Sciences ZDRW-CN-2016-1the100-Talent Program of the Chinese Academy of Sciences, and the Open Fund of Provincial Key Laboratory of Eco-Industrial Green Technology, Wuyi University WYKF2019-7

Figures(4)

Solvent-free polyurethanes are synthesized under certain conditions via a rapid reaction between liquid prepolymers. During this process the molecular weight of the polymer is rapidly increased to produce polymeric materials containing a carbamate-based structure at a very fast rate. The organic solvents are completely avoided in the solvent-free polyurethane synthesis process, thus avoiding all the problems associated with the use of organic solvents. Solvent-free polyurethane synthetic leather is extruded directly without adding solvents in the production and processing process, which has the advantages of low VOC emission and environmentally friendly. This review brings together theoretical and experimental research on the application and synthesis and preparation of solvent-free polyurethanes to generate an understanding of the theory and synthesis and preparation techniques associated with solvent-free polyurethanes. The review includes (i) the application and development direction of solvent-free polyurethane, (ii) an overview of the technology of solvent-free polyurethane synthetic leather preparation, (iii) a study of the modification and synthesis of solvent-free polyurethane prepolymers, (iv) a summary of the technology of rapid foam forming of solvent-free polyurethane and its influencing factors, (v) a review of the technology of solvent-free polyurethane synthetic leather preparation. In addition to the review, a corresponding overview of the theoretical and experimental advances in solvent-free delayed foaming technology in recent years and a summary of the technology and experience in the preparation of solvent-free polyurethanes are also presented.
- solvent-free polyurethane,
- polyurethane synthetic leather,
- rapid foaming molding,
- delayed catalyst
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