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Standard Test Methods for Polyurethane Raw Materials: Determination of Total Chlorine in Isocyanates
Automaticky preložený názov:
Štandardné testovacie metódy pre Polyuretánové surovín: Stanovenie celkového chlóru v izokyanáty
NORMA vydaná dňa 1.2.2009
Označenie normy: ASTM D4661-09
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.2.2009
Kód tovaru: NS-28074
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
aromatic isocyanates, chlorine, isocyanates, oxygen bomb, polyurethane raw materials, Schöniger ignition, titration, Chlorine content--plastics, Isocyanates, Isomer analysis, Mixed isomers, Oxygen bomb method, Polyurethane raw materials--isocyanates, Quality control (QC)--plastics, Sch¨,oniger technique, Toluene diisocyanate (TDI), ICS Number Code 83.080.10 (Thermosetting materials)
| Significance and Use | ||||||
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These test methods can be used for research or for quality control to determine the total chlorine content of aromatic isocyanates. In some instances total chlorine content may correlate with performance in polyurethane systems. |
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| 1. Scope | ||||||
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1.1 These test methods determine the total chlorine content of aromatic isocyanates used as polyurethane raw materials. The difference between the total chlorine content and the hydrolyzable chlorine content (see Test Method D 4663) is a measure of the amount of o-dichlorobenzene and other ring-substituted chlorinated products that are present. Both procedures are applicable to a variety of organic compounds but the amount of sample used may have to be varied. (See Note 1.) 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 and health practices and determine the applicability of regulatory limitations prior to use. Note 1—There is no equivalent ISO standard. |
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| 2. Referenced Documents | ||||||
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