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ASTM D5155-01

Historical Revision

Standard Test Methods for Polyurethane Raw Materials Determination of the Isocyanate Content of Aromatic Isocyanates

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1.1 These test methods measure the isocyanate content of aromatic isocyanates used as polyurethane raw materials.

1.1.1 Test Method A—Unheated toluene-dibutylamine determines the amount of toluene diisocyanate in refined toluene-2,4-diisocyanate and toluene-2,6-diisocyanate, or mixtures of the two. Other isomers, if present, will be included in the determination. This test method may also be applied to other isocyanates of suitable reactivity and solubility.

1.1.2 Test Method B—Heated toluene-dibutylamine determines the amine equivalent of crude or modified isocyanates derived from toluene diisocyanate, methylenebis-(4-phenylisocyanate), and polymethylene polyphenylisocyanate.

1.1.3 Test Method C—Unheated trichlorobenzene-toluene-dibutylamine determines the isocyanate content of crude or modified isocyanates derived from toluene diisocyanate, methylene-bis-(4-phenylisocyanate), and polymethylene polyphenylisocyanate. This test method can also be used to assay isomer mixtures of toluene diisocyanate and methylene- bis-(phenylisocyanate).

1.2 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 1.

Note 2—Method C of this test method is equivalent to Method B of ISO 14896.


SDO ASTM: ASTM International
Document Number D5155
Publication Date Nov. 10, 2001
Language en - English
Page Count 5
Revision Level 01
Supercedes
Committee D20.22
Publish Date Document Id Type View
Aug. 1, 2019 D5155-19 Revision
Nov. 1, 2014 D5155-14E01 Revision
Nov. 1, 2014 D5155-14 Revision
April 1, 2010 D5155-10 Revision
April 1, 2007 D5155-07 Revision
Nov. 10, 2001 D5155-96 Revision
Nov. 10, 2001 D5155-01 Revision