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ASTM D4273-99
Standard Test Methods for Polyurethane Raw Materials Determination of Primary Hydroxyl Content of Polyether Polyols
STANDARD published on 10.11.1999
The information about the standard:
Designation standards: ASTM D4273-99
Note: WITHDRAWN
Publication date standards: 10.11.1999
SKU: NS-26639
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: American technical standard
Category: Technical standards ASTM
Annotation of standard text ASTM D4273-99 :
Keywords:
NMR, nuclear magnetic resonance spectroscopy, polyether polyol, polyurethane raw materials, ICS Number Code 83.080.20 (Thermoplastic materials)
Additional information
| 1. Scope | ||||||||
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1.1 Test Method A-Fluorine-19 Nuclear Magnetic Resonance Spectroscopy (fluorine-19 NMR), measures the primary hydroxyl content in ethylene oxide-propylene oxide polyethers used in flexible urethane foams. It is suitable for polyethers with hydroxyl numbers of 24 to 300 and primary hydroxyl percentages of 2 to 98. 1.2 Test Method B-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 suitable for polyethers with hydroxyl numbers of 24 to 109 and primary hydroxyl contents of 10 to 90% (see Note 1). Note 1-There are no equivalent ISO standards.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. |
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