ASTM D2024-2009 非离子表面活性剂始凝点的标准试验方法

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【英文标准名称】:StandardTestMethodforCloudPointofNonionicSurfactants
【原文标准名称】:非离子表面活性剂始凝点的标准试验方法
【标准号】:ASTMD2024-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D12.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Cloudpoint;Nonionicsurfactants;Solubility;Surfactants;Temperaturetests
【摘要】:Thecloudpointtemperatureisareproduciblecharacteristicofcertainpurenonionicsurfactants.Itisalsocharacteristicofcertainnonionicsurfactantformulatedsystems.Thistestmethodisappropriateforbothsystems.Note18212;Ifthetransitionfromadistinctlycloudytoaclearsolutionisnotsharp,thatis,ifitdoesnottakeplacewithinarangeof1x00B0;C,thistestmethodisnotappropriate.1.1Thistestmethodcoversaproceduretodeterminethex201C;cloudpointx201D;ofnonionicsurfactantsordetergentsystems.CloudPointisthetemperatureatwhichdissolvedcomponents(solidsorliquids)arenolongercompletelysoluble,precipatingasasecondphasegivingthefluidacloudyappearance.Itislimitedtothosesurfactantsanddetergentsystemsforwhichthevisiblesolubilitychangeoccursoverarangeof1x00B0;Corlessatconcentrationsof0.5to1.0%inDIwaterbetween30and95x00B0;C.1.2ChemicalLimitations8212;Nonionicsurfactantsthatexhibitacharacteristiccloudpointingeneraltermsconsistofawater-in-solublemoietycondensedwith50to75%byweightofethyleneoxide.Ifthelevelofethoxylationistoolowthesurfactantmaynotbewatersolubleattemperatureslessthan30x00B0;C,andifitistoohighnocloudpointmayexist.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G72
【国际标准分类号】:71_100_40
【页数】:2P.;A4
【正文语种】:英语