ASTM D6437-2005 聚氨酯原材料的标准试验方法:低碱多元醇中的碱性(多元醇的CPR值的测定)

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【英文标准名称】:StandardTestMethodforPolyurethaneRawMaterials:alkalinityinLow-AlkalinityPolyols(DeterminationofCPRvaluesofPolyols)
【原文标准名称】:聚氨酯原材料的标准试验方法:低碱多元醇中的碱性(多元醇的CPR值的测定)
【标准号】:ASTMD6437-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D20.22
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:碱度;试验;滴定法;试验方法;强碱性;氨基甲酸乙酯;多元醇;塑料和橡胶技术;聚氨酯;原材料
【英文主题词】:alkalinity;basicity;CPR;polyetherpolyol;polyol;polyurethane;prepolymer;rawmaterials;testmethod;titration;urethane
【摘要】:Thistestmethodissuitableforqualitycontrol,asaspecificationtestandforresearch.Theurethanereactionbetweenpolyolsandisocyanatestoformpolyurethanepolymersisknowntobesensitivetothepresenceofbasicsubstances.Thisisparticularlyimportantinthepreparationofpolyurethaneprepolymerswhichcontainisocyanategroupsthatareknowntoreactinthepresenceoftraceamountsofbasicsubstances.Sincemanypolyetherpolyolsareoftenmadewithstronglybasiccatalysts,itisimportanttohaveananalyticalmethodcapableofdetectingsmallquantitiesofresidualbasicsubstances.Thistestmethodiscapableofdetectingppmlevelsofbase(asKOH).31.1Thistestmethodcoversmeasuringalkalinityinlow-alkalinity(0.002meq/gbasicity)polyols.ThisalkalinityisoftenexpressedasCPR(controlledpolymerizationrate)ofpolyetherpolyols.Thistestmethodisnotapplicabletoamine-basedpolyols.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Note1ThereisnosimilarorequivalentISOstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_040_01
【页数】:3P.;A4
【正文语种】: