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ASTM-D5155:2001 Edition

ASTM-D5155:2001 Edition

$40.63

D5155-01 Standard Test Methods for Polyurethane Raw Materials Determination of the Isocyanate Content of Aromatic Isocyanates

Published By Publication Date Number of Pages
ASTM 2001 6
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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, methylene bis -(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 2Method C of this test method is equivalent to Method B of ISO 14896.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
Summary of Test Methods
2 Significance and Use
Interferences
Reagents and Materials
Sampling
Test Conditions
Apparatus
Reagents
Procedure
3 Calculation
Precision and Bias
Apparatus
Reagents
Procedure
Calculation
4 Precision and Bias
Apparatus
Reagents
Procedure
Calculation
Report
Precision and Bias
5 Keywords
TABLE 1

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