Cookies
We need your consent to use the individual data so that you can see information about your interests, among other things. Click "OK" to give your consent.
ASTM D4273-23
Standard Test Method for Polyurethane Raw Materials: Determination of Primary Hydroxyl Content of Polyether Polyols
Translate name
STANDARD published on 1.3.2023
The information about the standard:
Designation standards: ASTM D4273-23
Publication date standards: 1.3.2023
SKU: NS-1135816
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: American technical standard
Category: Technical standards ASTM
The category - similar standards:
Annotation of standard text ASTM D4273-23 :
Keywords:
NMR, nuclear magnetic resonance spectroscopy, polyurethane raw materials, primary hydroxyl, polyether polyol,, ICS Number Code 83.080.20 (Thermoplastic materials)
Additional information
| Significance and Use | ||||||||
|
5.1?The primary hydroxyl content provides information about the relative reactivities of polyols in the urethane forming reaction with isocyanates. |
||||||||
| 1. Scope | ||||||||
|
1.1?Carbon-13 Nuclear Magnetic Resonance Spectroscopy?(13C NMR) measures the primary hydroxyl content of ethylene oxide (EO)-propylene oxide (PO) polyether polyols used in preparing flexible polyurethane foams. This method is best suited for polyether polyols with primary hydroxyl contents of 10 to 90 %. 1.2?The values stated in SI units are to be regarded as 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. |
||||||||
| 2. Referenced Documents | ||||||||
|
We recommend:
Technical standards updating
Do you want to make sure you use only the valid technical standards?
We can offer you a solution which will provide you a monthly overview concerning the updating of standards which you use.
Would you like to know more? Look at this page.
