ASTM D4142-89(2022)

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.
Designation: D4142 − 89 (Reapproved 2022)
Standard Guide for
Testing Epoxy Resins
This standard is issued under the fixed designation D4142; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D1545 Test Method for Viscosity of Transparent Liquids by
Bubble Time Method
1.1 This guide covers methods for testing epoxy resins as
D1639 Test Method for Acid Value of Organic Coating
listed in Table 1. All of the methods were tested by interlabo-
Materials (Withdrawn 2005)
ratory participation in accordance with usual ASTM guide-
D1652 Test Method for Epoxy Content of Epoxy Resins
lines.Eachmethodspecifiesarecommendedamountofsample
D1726 Test Methods for Hydrolyzable Chloride Content of
for starting a separate analysis, but several of the procedures
Liquid Epoxy Resins
can be conducted on the same starting material if so desired.
D1847 Test Methods for Total Chlorine Content of Epoxy
For example, viscosity, color, and density could be run on the
Resins (Withdrawn 2007)
same specimen.
1.2 This standard does not purport to address all of the
3. Significance and Use
safety concerns, if any, associated with its use. It is the
3.1 This guide directs the user to test methods that deter-
responsibility of the user of this standard to establish appro-
mine properties generally accepted as standard test items for
priate safety, health, and environmental practices and deter-
classification of epoxy resins.
mine the applicability of regulatory limitations prior to use.
1.3 This international standard was developed in accor-
4. Epoxy Content
dance with internationally recognized principles on standard-
4.1 The epoxy content of epoxy resins is determined by
ization established in the Decision on Principles for the
reacting a solution of the resin with a standard solution of
Development of International Standards, Guides and Recom-
hydrogen bromide in glacial acetic acid. The quantity of acid
mendations issued by the World Trade Organization Technical
consumed is a measure of the epoxy content. Test Methods
Barriers to Trade (TBT) Committee.
D1652 was found to have a repeatability of 2 % of the epoxy
2. Referenced Documents content and a reproducibility of 6 % of the epoxy content.
2.1 ASTM Standards:
5. Hydrolyzable Chlorine
D445 Test Method for Kinematic Viscosity of Transparent
5.1 Test Method D1726 covers the determination of the
and Opaque Liquids (and Calculation of Dynamic Viscos-
easily hydrolyzable chlorine content of liquid epoxy resins in
ity)
concentrations below 1 weight %. The specimen is refluxed
D1209 Test Method for Color of Clear Liquids (Platinum-
with a known amount of a standard alcoholic potassium
Cobalt Scale)
hydroxide solution. The amount of hydroxide consumed is
D1259 Test Methods for Nonvolatile Content of Resin
measured by titration and corresponds to the hydrolyzable
Solutions
chlorine content of the resin. By interlaboratory testing, the
D1475 Test Method for Density of Liquid Coatings, Inks,
repeatability was found to be 0.02 %, and the reproducibility
and Related Products
was found to be 0.05 %, both absolute.
D1544 Test Method for Color of Transparent Liquids (Gard-
ner Color Scale)
6. Total Chlorine
6.1 Organic and inorganic chlorine compounds are deter-
This guide is under the jurisdiction of ASTM Committee D01 on Paint and
minedinepoxyresinsinaccordancewithTestMethodsD1847.
Related Coatings, Materials, and Applications and is the direct responsibility of
The resin specimen is oxidized by combustion in a bomb
Subcommittee D01.33 on Polymers and Resins.
Current edition approved June 1, 2022. Published June 2022. Originally
containing oxygen under pressure. The chlorides formed are
approved in 1982. Last previous edition approved in 2017 as D4142 – 89 (2017).
dissolved in a sodium carbonate solution and then either
DOI: 10.1520/D4142-89R22.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
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