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ASTM D4273-05
Standard Test Methods for Polyurethane Raw Materials Determination of Primary Hydroxyl Content of Polyether Polyols
STANDARD published on 1.7.2005
The information about the standard:
Designation standards: ASTM D4273-05
Note: WITHDRAWN
Publication date standards: 1.7.2005
SKU: NS-26637
The number of pages: 8
Approximate weight : 24 g (0.05 lbs)
Country: American technical standard
Category: Technical standards ASTM
Annotation of standard text ASTM D4273-05 :
Keywords:
NMR, nuclear magnetic resonance spectroscopy, polyether polyol, polyurethane raw materials, ICS Number Code 83.080.20 (Thermoplastic materials)
Additional information
| Significance and Use | ||||||||
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Measurements of primary hydroxyl content are useful for providing information regarding the relative reactivities of polyols. |
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| 1. Scope | ||||||||
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1.1 Carbon-13 Nuclear Magnetic Resonance Spectroscopy(carbon-13 NMR), measures the primary hydroxyl content of ethylene oxide-propylene oxide polyethers used in preparing flexible foams. It is best suited for polyethers with primary hydroxyl contents of 10 to 90 %. Note 1—There is no equivalent ISO standard. 1.2 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. |
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| 2. Referenced Documents | ||||||||
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