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ASTM D4660-06

Historical Revision

Standard Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate

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1.1 These test methods measure the amount of toluene-2,6-diisocyanate (TDI) or toluene-2,4-diisocyanate in mixtures of the 2,4- and 2,6-isomers. Two test methods are required to give accurate results over a broad range of isomer concentrations.

1.1.1 Test Method AApplicable to TDI samples containing 5 to 95 % 2,6-isomer (95 to 5 % 2,4-isomer).

1.1.2 Test Method BApplicable to TDI samples containing 0 to 5 % 2,6-isomer (95 to 100 % 2,4-isomer). These test methods are equivalent to ISO 15064.

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. For specific warning and precautionary statements see Note 3.


These test methods can be used for research or for quality control to determine the isomer ratios of toluene diisocyanates.

The isomer ratio of a toluene diisocyanate relates to its reactivity.

SDO ASTM: ASTM International
Document Number D4660
Publication Date Sept. 1, 2006
Language en - English
Page Count 6
Revision Level 06
Supercedes
Committee D20.22
Publish Date Document Id Type View
March 15, 2023 D4660-23 Revision
April 1, 2018 D4660-18 Revision
May 1, 2012 D4660-12 Revision
Sept. 1, 2006 D4660-06 Revision
Nov. 10, 2000 D4660-00 Revision
March 15, 2006 D4660-00R06E01 Reaffirmation