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China
Industry Standards
In Force
HG/T 2409-2023
Determination of isocyanate group content in polyurethane prepolymer
Update Date: Oct 14, 2024
Latest Published
Dec 20, 2023
Implemented
Jul 01, 2024
Abolished
Alternative Standards
HG/T 2409-1992 Determination of Isocyanate Group Content in Polyurethane Performed Polymer
This standard will replace HG/T 2409-1992 for Determination of Isocyanate Group Content in Polyurethane Preformed Polymer on July 1, 2024.
Industry：
Chemical
Region：
China
Issuing Authority：
Ministry of Industry and Information Technology, People's Republic of China
Main Content：
This document specifies two methods for determining the content of isocyanate groups (NCO) in polyurethane prepolymers or intermediates: Method A, di-n-butylamine-anhydrous toluene/hydrochloric acid standard titration solution method; Method B, near-infrared spectroscopy method. These methods are suitable for use by polyurethane prepolymer manufacturers or related parties to determine the isocyanate group (NCO) content in their products using the di-n-butylamine-anhydrous toluene/hydrochloric acid standard titration solution method and the near-infrared spectroscopy method. They can also be used by relevant units for research and quality control of such products.
Operation：
Translations
Determination of isocyanate group content in polyurethane prepolymer
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File Language：English
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