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ASTM D7252-22
Standard Test Method for Polyurethane Raw Materials: Determination of Monomer and Isomers in Isocyanates
Translate name
STANDARD published on 1.7.2022
The information about the standard:
Designation standards: ASTM D7252-22
Publication date standards: 1.7.2022
SKU: NS-1066992
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Test conditions and procedures in generalRaw materials for rubber and plastics in generalCellular materials
Annotation of standard text ASTM D7252-22 :
Keywords:
chromatography, diisocyanate, HPLC, isocyanate, isomers, monomer, polymeric MDI, polyurethane raw materials, pure MDI,, ICS Number Code 19.020 (Test conditions and procedures in general),83.040.01 (Raw materials for rubber and plastics in general),83.100 (Cellular materials)
Additional information
| Significance and Use | ||||||
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5.1?This test method is 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?This test method determines the percent by weight of monomeric isomers and total monomer in crude or modified isocyanates. The test method is applicable to methylene di(phenylisocyanate) (MDI) and polymeric (methylene phenylisocyanate) (PMDI). (See Note 1.) 1.2?UnitsThe 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:?There is no known ISO equivalent to this
standard.
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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