ANSI/ASTM D5523-1994 聚氨基甲酸乙酯原料试验方法:测定单体、芳香异氰酸酯中的可水解氯的银盐定量测定酸度
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【英文标准名称】:TestMethodforPolyurethaneRawMaterials:AciditybyArgentometricDeterminationofHydrolyzableChlorineinMonomeric,AromaticIsocyanates
【原文标准名称】:聚氨基甲酸乙酯原料试验方法:测定单体、芳香异氰酸酯中的可水解氯的银盐定量测定酸度
【标准号】:ANSI/ASTMD5523-1994
【标准状态】:现行
【国别】:美国
【发布日期】:1994
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:塑料;聚氨酯;pH值
【英文主题词】:plastics;polyurethane;ph
【摘要】:Thistestmethodmeasuresthehydrolyzablechlorinecontentofmonomeric,aromaticisocyanatesusedaspolyurethanerawmaterialsandexpressesitasHClacidity.Thetestmethodisapplicabletotoluenediisocyanate(TDI)andmonomericmethylene-bis-(4-phenylisocyanate),knownasMDI.Themainsourcesofhydrolyzablechlorineand,therefore,acidityinmonomericaromaticisocyanatesarecarbamylchlorides,acidchlorides,anddissolvedphosgene.Allofthesecompoundsreactwithalcoholsandwatertoformhydrochloricacid.ThistestmethodappliesonlytomonomericisocyanatesinwhichalloftheacidityisderivedfromspeciesthatgenerateHClonsolvolysis.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1-ThereisnoequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:
【正文语种】:英语
【原文标准名称】:聚氨基甲酸乙酯原料试验方法:测定单体、芳香异氰酸酯中的可水解氯的银盐定量测定酸度
【标准号】:ANSI/ASTMD5523-1994
【标准状态】:现行
【国别】:美国
【发布日期】:1994
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:塑料;聚氨酯;pH值
【英文主题词】:plastics;polyurethane;ph
【摘要】:Thistestmethodmeasuresthehydrolyzablechlorinecontentofmonomeric,aromaticisocyanatesusedaspolyurethanerawmaterialsandexpressesitasHClacidity.Thetestmethodisapplicabletotoluenediisocyanate(TDI)andmonomericmethylene-bis-(4-phenylisocyanate),knownasMDI.Themainsourcesofhydrolyzablechlorineand,therefore,acidityinmonomericaromaticisocyanatesarecarbamylchlorides,acidchlorides,anddissolvedphosgene.Allofthesecompoundsreactwithalcoholsandwatertoformhydrochloricacid.ThistestmethodappliesonlytomonomericisocyanatesinwhichalloftheacidityisderivedfromspeciesthatgenerateHClonsolvolysis.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1-ThereisnoequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:
【正文语种】:英语
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