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ASTM D5629-23
Standard Test Method for Polyurethane Raw Materials: Determination of Acidity in Low-Acidity Aromatic Isocyanates and Polyurethane Prepolymers
Translate name
STANDARD published on 1.3.2023
The information about the standard:
Designation standards: ASTM D5629-23
Publication date standards: 1.3.2023
SKU: NS-1135567
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM D5629-23 :
Keywords:
acidity, aromatic isocyanates, isocyanates, methylene-bis-(4-phenylisocyanate), methylene di(phenylisocyanate), methylene diphenyldiisocyanate, MDI, prepolymer, polyurethane, raw materials, test method, TDI, titration, toluene diisocyanate,, ICS Number Code 83.080.10 (Thermosetting materials)
Additional information
| Significance and Use | ||||||||||
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5.1?This test method is suitable for research or for quality control to characterize aromatic isocyanates and low-acidity prepolymers. Acidity correlates with performance in some polyurethane systems. |
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| 1. Scope | ||||||||||
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1.1?This test method measures the acidity, expressed as ppm of hydrochloric acid (HCl), in aromatic isocyanate or polyurethane prepolymer samples of below 100 ppm acidity. The test method is applicable to products derived from toluene diisocyanate and methylene di(phenylisocyanate) (see Note 1). Refer to Test Method D6099 for determination of acidity in moderate- to high-acidity aromatic isocyanates. 1.2?The values stated in SI units are to be regarded as the 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:?This standard is equivalent to ISO 14898, Method
B.
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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