ASTM D4273-23

Standard Test Method for Polyurethane Raw Materials: Determination of Primary Hydroxyl Content of Polyether Polyols

ASTM International , 03/01/2023

Publisher: ASTM

File Format: PDF

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Description

Standard By:ASTM International , 03/01/2023

Published:03/01/2023

Pages:7

File Size:1 file , 320 KB

Language:English

Note:This product is unavailable in Russia, Ukraine, Belarus

1.1Carbon-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 %.

1.2The values stated in SI units are to be regarded as standard.

1.3This 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.

1.4This 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.