ASTM D6099 - 18

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

    1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ISO Standards

    ISO 14898 PlasticsAromatic isocyanates for use in the production of polyurethaneDetermination of acidity Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.

    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


    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)


    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D6099-18

    Citation Format

    ASTM D6099-18, Standard Test Method for Polyurethane Raw Materials: Determination of Acidity in Moderate to High Acidity Aromatic Isocyanates, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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