ASTM D5155-96
Historical Standard: ASTM D5155-96 Standard Test Methods for Polyurethane Raw Materials Determination of the Isocyanate Content of Aromatic Isocyanates
SUPERSEDED (see Active link, below)
ASTM D5155
1. Scope
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
D883 Terminology Relating to Plastics
D1193 Specification for Reagent Water
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ISO Standard
ISO14896 Polyurethane Raw Materials-Determination of Isocyanate ContentKeywords
isocyanates; isocyanates aromatic; methylene-bis-(4-phenylisocyanate); polymethylene polyphenylisocyanate; polyurethane; raw materials; test method; titration; toluene diisocyanate; Dibutylamine; Heated toluene-dibutylamine method; Isocyanates; Methylene- bis -(4-phenylisocyanate); Polymethylene polyphenylisocyanate; Polyurethane raw materials--isocyanates; Toluene diisocyanate (TDI); Unheated toluene-dibutylamine method; Unheated trichlorobenzene toluene-dibutylamine method ;
ICS Code
ICS Number Code 83.080.20 (Thermoplastic materials)
DOI: 10.1520/D5155-96
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