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Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate
NORMA vydaná dňa 1.4.2018
Označenie normy: ASTM D4660-18
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.4.2018
Kód tovaru: NS-845267
Počet strán: 6
Približná hmotnosť: 18 g (0.04 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
FTIR, infrared, IR, isomer, polyurethane raw material, TDI, toluene diisocyanate,, ICS Number Code 83.040.30 (Auxiliary materials and additives for plastics)
Significance and Use | ||||||
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 | ||||||
1.1 These test methods measure the amount of toluene-2,6-diisocyanate (2,6-TDI) isomer or toluene–2,4–diisocyanate (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 A—Applicable to TDI samples containing 5 to 95 % of 2,6-TDI isomer (5 to 95 % 2,4-TDI isomer). 1.1.2 Test Method B—Applicable 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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