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ASTM D4660-23
Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate
NORMA vydaná dňa 15.3.2023
Informácie o norme:
Označenie normy: ASTM D4660-23
Dátum vydania normy: 15.3.2023
Kód tovaru: NS-1136684
Počet strán: 6
Približná hmotnosť: 18 g (0.04 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM D4660-23 :
Keywords:
FTIR, infrared, IR, isomer, polyurethane raw material, TDI, toluene diisocyanate,, ICS Number Code 83.040.30 (Auxiliary materials and additives for plastics)
Doplňujúce informácie
| Significance and Use | ||||||
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5.1?These test methods are suitable for research or for quality control to determine the isomer content of toluene diisocyanates. 5.2?The isomer content of a toluene diisocyanate relates to its reactivity. |
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| 1. Scope | ||||||
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1.1?These test methods measure the amount of toluene-2,6-diisocyanate (2,6-TDI) isomer or toluene2,4diisocyanate (2,4-TDI) isomer in mixtures of the 2,4- and 2,6-isomers of toluenediisocyanate (TDI). Two different test methods are provided to give accurate results over the broad range of isomer concentrations possible. 1.1.1?Test Method AApplicable to TDI samples containing 5 to 95 % of 2,6-TDI isomer (5 to 95 % 2,4-TDI isomer). 1.1.2?Test Method BApplicable to TDI samples containing 0 to 5 % of 2,6-TDI isomer (95 to 100 % 2,4-TDI isomer). Note 1:?These test methods are equivalent to ISO
15064.
1.2?The values stated in SI units are to be regarded as standard. 1.3?This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4?This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
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| 2. Referenced Documents | ||||||
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