Designation:D4663−20StandardTestMethodforPolyurethaneRawMaterials:DeterminationofHydrolyzableChlorineofIsocyanates1ThisstandardisissuedunderthefixeddesignationD4663;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethoddeterminesthehydrolyzablechlorinecontentoftoluene-2,4-diisocyanate,toluene-2,6-diisocyanate,ormixturesofthetwo.Itisacceptabletoapplythistestmethodtootherisocyanatesofsuitablesolubility.(SeeNote1.)Themainsourcesofhydrolyzablechlorineintheisocyanatesarecarbamoylchlorideanddissolvedphosgene.Bothofthesecompoundsreactwithalcoholsandwater,formingureas,carbamates,carbondioxide,andhydrochloricacid.(SeeNote2.)1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.NOTE1—Itispossiblethatthistestmethodisapplicabletocrudepolymericisocyanates.However,theprecisionwithcrudepolymericisocyanateshasnotbeenestablished.NOTE2—ThisstandardisidenticaltoISO15028.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocument2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsD1193SpecificationforReagentWaterE456TerminologyRelatingtoQualityandStatisticsE2935PracticeforConductingEquivalenceTestinginLaboratoryApplications2.2ISOStandards:ISO15028Plastics—AromaticIsocyanatesforUseintheProductionofPolyurethanes—DeterminationofHydroly-sableChlorine33.Terminology3.1Definitions—Termsusedinthisstandardaredefinedinaccor...
