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Progress in Chemistry 2002, Vol. 14 Issue (05): 339- Previous Articles   Next Articles

• Review •

Kinetics of Reactions of Blocked Isocyanates

Zhang XueTong;Luo Yunjun*;Tan Huimin;Shen Jianbo   

  1. School of Chemical Engineering and Materials Science, Beijing Institute of Technology, Beijing 100081, China; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received: Revised: Online: Published:
  • Contact: Luo Yunjun
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Blocked isocyanates are widely used in many kinds of one-package coatings, powder coatings and adhesives. They have also been used in water-borne polyurethane. The kinetics and mechanism of the reactions of blocked isocyanates are reviewed and two urethane forming reaction mechanisms by which a blocked isocyanate can react with a nucleophile are provided. Furthermore, effects of isocyanate structure, reaction medium, catalyst and functionality on kinetics of blocked isocyanate are discussed in detail.
Key words: blocked isocyanates, blocking groups, deblocking temperature, kinetics

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