ASTM_D_4142_-_89_2022.pdf

Designation:D414289(Reapproved 2022)Standard Guide forTesting Epoxy Resins1This standard is issued under the fixed designation D4142;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide covers methods for testing epoxy resins aslisted in Table 1.All of the methods were tested by interlabo-ratory participation in accordance with usual ASTM guide-lines.Each method specifies a recommended amount of samplefor starting a separate analysis,but several of the procedurescan be conducted on the same starting material if so desired.For example,viscosity,color,and density could be run on thesame specimen.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)D1259 Test Methods for Nonvolatile Content of ResinSolutionsD1475 Test Method for Density of Liquid Coatings,Inks,and Related ProductsD1544 Test Method for Color of Transparent Liquids(Gard-ner Color Scale)D1545 Test Method for Viscosity of Transparent Liquids byBubble Time MethodD1639 Test Method for Acid Value of Organic CoatingMaterials(Withdrawn 2005)3D1652 Test Method for Epoxy Content of Epoxy ResinsD1726 Test Methods for Hydrolyzable Chloride Content ofLiquid Epoxy ResinsD1847 Test Methods for Total Chlorine Content of EpoxyResins(Withdrawn 2007)33.Significance and Use3.1 This guide directs the user to test methods that deter-mine properties generally accepted as standard test items forclassification of epoxy resins.4.Epoxy Content4.1 The epoxy content of epoxy resins is determined byreacting a solution of the resin with a standard solution ofhydrogen bromide in glacial acetic acid.The quantity of acidconsumed is a measure of the epoxy content.Test MethodsD1652 was found to have a repeatability of 2%of the epoxycontent and a reproducibility of 6%of the epoxy content.5.Hydrolyzable Chlorine5.1 Test Method D1726 covers the determination of theeasily hydrolyzable chlorine content of liquid epoxy resins inconcentrations below 1 weight%.The specimen is refluxedwith a known amount of a standard alcoholic potassiumhydroxide solution.The amount of hydroxide consumed ismeasured by titration and corresponds to the hydrolyzablechlorine content of the resin.By interlaboratory testing,therepeatability was found to be 0.02%,and the reproducibilitywas found to be 0.05%,both absolute.6.Total Chlorine6.1 Organic and inorganic chlorine compounds are deter-mined in epoxy resins in accordance with Test Methods D1847.The resin specimen is oxidized by combustion in a bombcontaining oxygen under pressure.The chlorides formed aredissolved in a sodium carbonate solution and then either1This guide is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.33 on Polymers and Resins.Current edition approved June 1,2022.Published June 2022.Originallyapproved in 1982.Last previous edition approved in 2017 as D4142 89(2017).DOI:10.1520/D4142-89R22.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1titrated or determined gravimetrically.The absolute repeatabil-ity and reproducibility for the titration method are 0.02 and0.05 weight%,respectively.For the gravimetric method,therepeatability and reproducibility are both reported to be 0.05weight%,absolute.7.Viscosity7.1 Kinematic viscosity is det