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ASTM D2572-19
Standard Test Method for Isocyanate Groups in Urethane Materials or Prepolymers
NORMA vydaná dňa 1.10.2019
Informácie o norme:
Označenie normy: ASTM D2572-19
Dátum vydania normy: 1.10.2019
Kód tovaru: NS-972331
Počet strán: 2
Približná hmotnosť: 6 g (0.01 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Anotácia textu normy ASTM D2572-19 :
Keywords:
dicyclohexylmethane-4,4-diisocyanate (rMDI), hexamethylene diisocyanate, isophorone diisocyanate (IPDI), polymeric MDI, toluene, 2,4-diisocyanate based intermediate, toluene, 2,4-diisocyanate based prepolymer, urethane intermediate, urethane prepolymer, 2,4-diphenylmethane diisocyanate, 4,4-diphenylmethane diisocyanate,, ICS Number Code 71.080.99 (Other organic chemicals)
Doplňujúce informácie
| Significance and Use | ||
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4.1 The percent NCO is used to establish unit ratios for stoichiometric reactions with co-reactants. |
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| 1. Scope | ||
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1.1 This test method covers the determination of the isocyanate group (NCO) content of a urethane intermediate or prepolymer. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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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