ASTM D3168 - 85(2011)

    Standard Practice for Qualitative Identification of Polymers in Emulsion Paints

    Active Standard ASTM D3168 | Developed by Subcommittee: D01.21

    Book of Standards Volume: 06.01


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    Significance and Use

    Identification of specific acrylic polymers in emulsion paints is often difficult or impossible by infrared alone. This is particularly true when the acrylic is present in a small amount as a comonomer with vinyl acetate, or when blended with alkyds or other ester systems. If identification of an acrylic component is required in such a system, it may often be accomplished by gas-liquid chromatographic analysis of the pyrolyzed paint film. The presence of a number of other polymers may often also be confirmed by pyrolysis since they produce characteristic and reproducible pyrograms.

    The pyrograms obtained from unknown samples vary in complexity according to the sample composition. It is necessary to establish the presence or absence of as many components as possible from a study of the infrared spectra obtained in the first part of this practice. The gas-liquid chromatography results may then be used to help identify any unknown components present and to confirm identifications made by infrared.

    1. Scope

    1.1 This practice describes a procedure for the qualitative identification in emulsion paints of most types of polymers present as major components of the paint vehicle. Limitations are discussed in Sections and .

    1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

    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.


    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

    D16 Terminology for Paint, Related Coatings, Materials, and Applications

    D1193 Specification for Reagent Water

    D2621 Test Method for Infrared Identification of Vehicle Solids From Solvent-Reducible Paints

    E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers


    ICS Code

    ICS Number Code 87.040 (Paints and varnishes)

    UNSPSC Code

    UNSPSC Code 31211501(Enamel paints)


    DOI: 10.1520/D3168-85R11

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