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ASTM D4660-12

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 (2,6-TDI) isomer or toluene2,4diisocyanate (2,4-TDI) isomer in mixtures of the 2,4- and 2,6-isomers of toluenediisocyanate (TDI). Two different test methods are provided to give accurate results over the broad range of isomer concentrations possible.

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

1.1.2 Test Method BApplicable to TDI samples containing 0 to 5 % of 2,6-TDI isomer (95 to 100 % 2,4-TDI isomer).

Note 1—These test methods are equivalent to ISO 15064.

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 and health practices and determine the applicability of regulatory limitations prior to use.

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

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

SDO ASTM: ASTM International
Document Number D4660
Publication Date May 1, 2012
Language en - English
Page Count 6
Revision Level 12
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