Designation:D3837−95(Reapproved2019)StandardPracticeforPreparingaSolutionofAlkali–SolubleResins1ThisstandardisissuedunderthefixeddesignationD3837;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeisaprocedureforpreparingsolutionsofalkali-solubleresinsinaqueousammoniaanddeterminingthecharacteristicsofsuchsolutions.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1544TestMethodforColorofTransparentLiquids(Gard-nerColorScale)D2834TestMethodforNonvolatileMatter(TotalSolids)inWater-EmulsionFloorPolishes,Solvent-BasedFloorPolishes,andPolymer-EmulsionFloorPolishesE70TestMethodforpHofAqueousSolutionsWiththeGlassElectrode3.SummaryofPractice3.1Alkali-solubleresinsaredissolvedinwaterbychemi-callyreactingavailablecarboxylicacidsitesontheresinmoleculewithabasetoformwater-solublecarboxylatesalts.Inthispractice,thebaseusedisammoniumhydroxide.4.SignificanceandUse4.1Thispracticeissuitableforalltypesofakalali-solubleresins.Theresinmanufacturershallspecifythepercentam-moniumhydroxidetobeused(basedontheequivalentweightofresin)andthemaximumtemperaturetobeusedtoachievesolution.5.ReagentsandMaterials5.1ReactionVessel—Athree-neck,roun...
