Designation:D4659−19StandardTestMethodsforPolyurethaneRawMaterials:DeterminationofSpecificGravityofIsocyanates1ThisstandardisissuedunderthefixeddesignationD4659;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thesetestmethodsdeterminethespecificgravityoftoluenediisocyanate,polymeric(methylenephenylisocyanate),andliquidmethylenedi(phenylisocyanate).Thesetestmethodsalsoareapplicabletomanyotherliquids.(SeeNote1.)1.1.1TestMethodA—Specificgravitybypycnometer,forhigh-accuracydetermination.1.1.2TestMethodB—Specificgravitybyhydrometer,foralessaccurate,butrapid,determination.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.NOTE1—ThereisnoknownISOequivalenttothisstandard.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsD891TestMethodsforSpecificGravity,Apparent,ofLiquidIndustrialChemicalsD1193SpecificationforReagentWaterD4052TestMethodforDensity,RelativeDensity,andAPIGravityofLiquidsbyDigitalDensityMeterE100SpecificationforASTMHydrometersE456TerminologyRelatingtoQualityandStatisticsE202TestMethodsforAnalysisofEthyleneGlycolsandPropyleneGlycolsE2251SpecificationforLiquid-in-GlassASTMThermom-eterswithLow-HazardPrecisionLiquidsE2935PracticeforCondu...
