Designation:D4676−94(Reapproved2021)StandardClassificationforRubberCompoundingMaterials—Antidegradants1ThisstandardisissuedunderthefixeddesignationD4676;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisclassificationcoversantidegradantsusedinrubberandwhereappropriatedefinestheirimportantchemicalandphysicalcharacteristicsforuseinrubber.1.2Thegeneralterm“antidegradant”describesmaterialsusedinrubbertoprotectagainsttheeffectsofoxygenandozone.Materialsthatfallinthisgeneralcategoryincludebothantioxidantsandantiozonants.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1218TestMethodforRefractiveIndexandRefractiveDispersionofHydrocarbonLiquidsD1519TestMethodsforRubberChemicals—DeterminationofMeltingRangeD1747TestMethodforRefractiveIndexofViscousMate-rialsD2702PracticeforRubberChemicals—DeterminationofInfraredAbsorptionCharacteristicsD3461TestMethodforSofteningPointofAsphaltandPitch(MettlerCup-and-BallMethod)D4571TestMethodsforRubberCompoundingMaterials—DeterminationofVolatileMaterialD4574TestMethodsforRubberCompoundingMaterials—DeterminationofAshContentD4937TestMethodforp-PhenylenediamineAntidegradantsPuritybyGasChromatographyD5376TestMethodforRubberCompoundingMaterials—DeterminationoftheBasicNitrogenContentinRubberAntiox...
