ASTM D1726-03

Standard Test Methods for Hydrolyzable Chloride Content of Liquid Epoxy Resins

SIGNIFICANCE AND USE
The hydrolyzable chloride content of liquid 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 hydrolyzable chloride content of manufactured epoxy resins and confirm the stated hydrolyzable chloride content of purchased epoxy resins.
SCOPE
1.1 These test methods cover the determination of the easily hydrolyzable chloride content of liquid epoxy resins which are defined as the reaction product of a chlorohydrin and a di- or polyfunctional phenolic compound.
1.1.1 In Test Method A, the easily hydrolyzable chloride is saponified with potassium hydroxide and directly titrated with hydrochloric acid. This test method can be used for concentrations of 1 weight % and below.
1.1.2 In Test Method B, the easily hydrolyzable chloride is again saponified with potassium hydroxide, then titrated potentiometrically with silver nitrate. This test method can be used for concentrations of 5 to 2500 ppm hydrolyzable chloride.
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 Sections 9 and 15.

General Information

• Status: Historical
• Publication Date: 30-Nov-2003
• ICS: 83.080.10 - Thermosetting materials
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.33 - Polymers and Resins

Relations

• Replaces: ASTM D1726-90(1996) - Standard Test Methods for Hydrolyzable Chloride Content of Liquid Epoxy Resins
• Effective Date: 01-Dec-2003
• Replaced By: ASTM D1726-11 - Standard Test Methods for Hydrolyzable Chloride Content of Liquid Epoxy Resins
• Effective Date: 01-Jun-2011
• Referred By: ASTM D4142-89(2022) - Standard Guide for Testing Epoxy Resins
• Effective Date: 01-Dec-2003

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation:D1726–03
Standard Test Methods for
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Hydrolyzable Chloride Content of Liquid Epoxy Resins
This standard is issued under the fixed designation D1726; 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. Scope 2.2 Other Documents:
OSHA Regulations, 29 CFR, paragraphs 1910.1000 and
1.1 These test methods cover the determination of the easily
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1910.1200
hydrolyzable chloride content of liquid epoxy resins which are
defined as the reaction product of a chlorohydrin and a di- or
3. Terminology
polyfunctional phenolic compound.
3.1 For definitions relating to hydrocarbon resins see Ter-
1.1.1 In Test Method A, the easily hydrolyzable chloride is
minology D6440.
saponified with potassium hydroxide and directly titrated with
hydrochloric acid. This test method can be used for concen-
4. Summary of Test Method
trations of 1 weight % and below.
4.1 The sample is refluxed in the presence of a known
1.1.2 In Test Method B, the easily hydrolyzable chloride is
amountof0.1Nalcoholicpotassiumhydroxide.Theamountof
again saponified with potassium hydroxide, then titrated po-
potassium hydroxide consumed in the hydrolysis is a measure
tentiometrically with silver nitrate. This test method can be
of the hydrolyzable chloride content of the resin.
used for concentrations of 5 to 2500 ppm hydrolyzable
chloride.
5. Significance and Use
1.2 The values stated in SI units are to be regarded as the
5.1 Thehydrolyzablechloridecontentofliquidepoxyresins
standard. The values given in parentheses are for information
is an important variable in determining their reactivity and the
only.
properties of coatings made from them. These test methods
1.3 This standard does not purport to address all of the
may be used to determine the hydrolyzable chloride content of
safety concerns, if any, associated with its use. It is the
manufacturedepoxyresinsandconfirmthestatedhydrolyzable
responsibility of the user of this standard to establish appro-
chloride content of purchased epoxy resins.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific hazard
6. Apparatus
statements see Sections 9 and 15.
6.1 Reflux Apparatus, consisting of a 250-mL Erlenmeyer
flask attached to a reflux condenser and a hot plate with
2. Referenced Documents
variable heat control.
2
2.1 ASTM Standards:
D329 Specification for Acetone
7. Purity of Reagents
D841 Specification for Nitration Grade Toluene
7.1 Purity of Reagents—Reagent grade chemicals shall be
D1193 Specification for Reagent Water
used in all tests. Unless otherwise indicated, it is intended that
D3620 Specification for Glacial Acetic Acid
all reagents shall conform to the specifications of the Commit-
D6440 Terminology Relating to Hydrocarbon Resins
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tee onAnalytical Reagents of theAmerican Chemical Society,
E691 Practice for Conducting an Interlaboratory Study to
where such specifications are available. Other grades may be
Determine the Precision of a Test Method
used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
accuracy of the determination.
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This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
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Subcommittee D01.33 on Polymers and Resins. AvailablefromU.S.GovernmentPrintingOfficeSuperintendentofDocuments,
Current edition approved Dec. 1, 2003. Published January 2004. Originally 732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401.
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approved in 1960. Last previous edition approved in 1990 as D1726 – 90 (1996). Reagent Chemicals, American Chemical Society Specifications, American
DOI: 10.1520/D1726-03. Chemical Society, Washington, DC. For suggestions on the testing of reagents not
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or listed by the American Chemical Society, see Analar Standards for Laboratory
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Standards volume information, refer to the standard’s Document Summary page on and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
the ASTM website. MD.
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D1726–03
7.2 Purity of Water—Unless otherwise i
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