ASTM D6099 - 13

    Standard Test Method for Polyurethane Raw Materials: Determination of Acidity in Moderate to High Acidity Aromatic Isocyanates

    Active Standard ASTM D6099 | Developed by Subcommittee: D20.22

    Book of Standards Volume: 08.03


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    Significance and Use

    5.1 This test method can be used for research or for quality control to characterize aromatic isocyanates and prepolymers of moderate to high acidity. Acidity correlates with performance in some polyurethane systems.

    1. Scope

    1.1 This test method determines the acidity, expressed as parts per million (ppm) of HCl, in aromatic isocyanate samples of greater than 100–ppm acidity. The test method is applicable to products derived from toluene diisocyanate and methylene-bis-(4–phenylisocyanate) (see Note 1).

    Note 1This test method is equivalent to ISO 14898, Test Method A.


    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

    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 Standards

    ISO14898 Plastics--Aromatic isocyanates for use in the production of polyurethane--Determination of acidity Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.


    ICS Code

    ICS Number Code 83.040.01 (Raw materials for rubber and plastics in general)

    UNSPSC Code

    UNSPSC Code 12352118(Cyanates or isocyanates or thiocyantes or isothiocyanates)


    DOI: 10.1520/D6099

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