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ASTM D5155-19
Standard Test Methods for Polyurethane Raw Materials: Determination of the Isocyanate Content of Aromatic Isocyanates
Translate name
STANDARD published on 1.8.2019
The information about the standard:
Designation standards: ASTM D5155-19
Publication date standards: 1.8.2019
SKU: NS-968553
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM D5155-19 :
Keywords:
isocyanates, isocyanates aromatic, methylene-bis-(4-phenylisocyanate), polymethylene polyphenylisocyanate, polyurethane, raw materials, test method, titration, toluene diisocyanate,, ICS Number Code 83.080.20 (Thermoplastic materials)
Additional information
| Significance and Use | ||||||||||
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5.1 These test methods are to be used for research or for quality control to characterize isocyanates used in polyurethane products. |
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| 1. Scope | ||||||||||
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1.1 These test methods are used to measure the isocyanate content of aromatic isocyanates used as polyurethane raw materials. 1.1.1 Test Method A—Unheated toluene-dibutylamine determines the toluene diisocyanate content, the amine equivalent and the isocyanate content of refined toluene-2,4-diisocyanate and toluene-2,6-diisocyanate, or mixtures of the two. Other isomers, if present, will be included in the determination. This test method is also applicable to other isocyanates of suitable reactivity and solubility. 1.1.2 Test Method B—Heated toluene-dibutylamine determines the amine equivalent and the isocyanate content of crude or modified isocyanates derived from toluene diisocyanate, methylene di-(4-phenylisocyanate) and polymeric (methylene phenylisocyanate). 1.1.3 Test Method C—Unheated trichlorobenzene-toluene-dibutylamine determines the amine equivalent and the isocyanate content of crude or modified isocyanates derived from toluene diisocyanate, methylene-di-(4-phenylisocyanate) and polymeric (methylene phenylisocyanate). 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. Note 1: Method C of this test method is equivalent to Method B
of ISO 14896.
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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