Designation:D5155−14StandardTestMethodsforPolyurethaneRawMaterials:DeterminationoftheIsocyanateContentofAromaticIsocyanates1ThisstandardisissuedunderthefixeddesignationD5155;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thesetestmethodsmeasuretheisocyanatecontentofaromaticisocyanatesusedaspolyurethanerawmaterials.1.1.1TestMethodA—Unheatedtoluene-dibutylaminedeter-minesthetoluenediisocyanatecontent,theamineequivalentandtheisocyanatecontentofrefinedtoluene-2,4-diisocyanateandtoluene-2,6-diisocyanate,ormixturesofthetwo.Otherisomers,ifpresent,willbeincludedinthedetermination.Thistestmethodisalsoapplicabletootherisocyanatesofsuitablereactivityandsolubility.1.1.2TestMethodB—Heatedtoluene-dibutylaminedeter-minestheamineequivalentandtheisocyanatecontentofcrudeormodifiedisocyanatesderivedfromtoluenediisocyanate,methylenedi-(4-phenylisocyanate)andpolymeric(methylenephenylisocyanate).1.1.3TestMethodC—Unheatedtrichlorobenzene-toluene-dibutylaminedeterminestheamineequivalentandtheisocya-natecontentofcrudeormodifiedisocyanatesderivedfromtoluenediisocyanate,methylene-di-(4-phenylisocyanate)andpolymeric(methylenephenylisocyanate).1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—MethodCofthistestmethodisequivalenttoMethodBofISO14896.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsD1193SpecificationforReagentWaterE180PracticeforDeterminingthePrecisionofASTMMethodsforAnalysisandTestingofIndustrialandSpe-cialtyChemicals(Withdrawn2009)3E691...
