Improvement of Method for Determination of Isocyanate Group Content in Polyurethane Prepolymer

Abstract:

This paper represents the improvement of method for determination of isocyanate group content in polyurethane prepolymer. Acetone-dibutylamine method and toluene-dibutylamine method were used separately to determine the isocyanate group content in polyurethane prepolymer. The –NCO content tested by the two methods were close. In the former method, 15-20 mL acetone was used as solvent and the titration end point was easy to confirm. While in the latter method, additional solvent (isopropanol) was used which causes environmental contamination.

• Periodical: Applied Mechanics and Materials (Volumes 303-306)
• Pages: 2533-2536
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.303-306.2533
• Online since: February 2013
• Authors: Wen Jin Ji, Wei Song, Yu Ying Zheng, Xiang Zhu He
• Keywords: Acetone, Improvement of Method, Isocyanate Group Content, Polyurethane Prepolymer

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