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ASTM D1652-11e1

(Test Method)

Standard Test Method for Epoxy Content of Epoxy Resins

Standard Test Method for Epoxy Content of Epoxy Resins

SIGNIFICANCE AND USE
The epoxy content of epoxy resins is an important variable in determining their reactivity and the properties of coatings made from them. These test methods may be used to determine the epoxy content of manufactured epoxy resins and confirm the stated epoxy content of purchased epoxy resins.
SCOPE
1.1 This test method covers the procedure for manual and automatic titration of epoxy resins for the quantitative determination of the percent epoxide content from 0.1 to 26 % epoxide.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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 hazard statements, see Section 6.

General Information

Status
Historical
Publication Date
31-Oct-2011
ICS
83.080.10 - Thermosetting materials
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.33 - Polymers and Resins
Current Stage
Ref Project

Relations

Replaces
ASTM D1652-11 - Standard Test Method for Epoxy Content of Epoxy Resins
Effective Date
01-Nov-2011
Referred By
ASTM D1763-00(2021) - Standard Specification for Epoxy Resins
Effective Date
01-Nov-2011
Referred By
ASTM D4142-89(2022) - Standard Guide for Testing Epoxy Resins
Effective Date
01-Nov-2011

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ASTM D1652-11e1 - Standard Test Method for Epoxy Content of Epoxy ResinsASTM D1652-11e1 - Standard Test Method for Epoxy Content of Epoxy Resins
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ASTM D1652-11e1 - Standard Test Method for Epoxy Content of Epoxy Resins
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation: D1652 − 11
Standard Test Method for
1
Epoxy Content of Epoxy Resins
This standard is issued under the fixed designation D1652; 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.
This standard has been approved for use by agencies of the Department of Defense.
1
´ NOTE—Editorial corrections were made throughout in May 2012.
1. Scope* 3.1.1 In the Manual Titration Method, the titration is with
standard perchloric acid in the presence of an excess of
1.1 This test method covers the procedure for manual and
tetraethylammonium bromide. Hydrogen bromide generated in
automatic titration of epoxy resins for the quantitative deter-
situ by the addition of perchloric acid to the quaternary
mination of the percent epoxide content from 0.1 to 26 %
ammonium halide rapidly opens the oxirane ring.
epoxide.
3.1.2 In the Automatic Titration Method, the reaction is
1.2 The values stated in SI units are to be regarded as the
measuring the millivolt (MV) potential as perchloric acid is
standard. The values given in parentheses are for information
added, which combines with the bromide to form the hydro-
only.
bromic acid, which reacts with the epoxide group. As the
1.3 This standard does not purport to address all of the reaction progresses, the potential will gradually increase until
safety concerns, if any, associated with its use. It is the
the reaction nears completion at which point the potential
responsibility of the user of this standard to establish appro- increases very quickly. The titrator measures the rate of the
priate safety and health practices and determine the applica-
reaction by calculating the change in potential between per-
bility of regulatory limitations prior to use. For specific hazard chloric acid addition increments. When the change in potential
statements, see Section 6.
begins to decrease, the titrator determines that the titration is
complete. The epoxide content is calculated using the reagent
2. Referenced Documents
factor entered by the user during standardization, the weight of
2
the sample, and the volume of perchloric acid added during
2.1 ASTM Standards:
D1193 Specification for Reagent Water titration.
2.2 Other Documents:
4. Significance and Use
OSHA Regulations, 29 CFR paragraphs 1910.1000 and
3
1910.1200
4.1 The epoxy content of epoxy resins is an important
variable in determining their reactivity and the properties of
3. Summary of Test Method
coatings made from them. These test methods may be used to
determine the epoxy content of manufactured epoxy resins and
3.1 The resin is dissolved in a suitable solvent and the
confirm the stated epoxy content of purchased epoxy resins.
resulting solution is titrated with hydrogen bromide either
directly or in situ. The hydrogen bromide reacts stoichiometri-
5. Reagents
cally with epoxy groups to form bromohydrins; therefore, the
quantity of acid consumed is a measure of the epoxy content.
5.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to the specifications of the Commit-
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
tee onAnalytical Reagents of theAmerican Chemical Society,
and Related Coatings, Materials, andApplications and is the direct responsibility of
4
Subcommittee D01.33 on Polymers and Resins. where such specifications are available. Other grades may be
Current edition approved Nov. 1, 2011. Published January 2012. Originally
used, provided it is first ascertained that the reagent is of
approved in 1969. Last previous edition approved in 2004 as D1652 – 04. DOI:
10.1520/D1652-11E01.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Reagent Chemicals, American Chemical Society Specifications, American
Standards volume information, refer to the standard’s Document Summary page on Chemical Society, Washington, DC. For suggestions on the testing of reagents not
the ASTM website. listed by the American Chemical Society, see Analar Standards for Laboratory
3
AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments, Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:// and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
www.access.gpo.gov. MD.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C70
...

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