【英文标准名称】:StandardTestMethodforMercaptobenzothiazoleSulfenamideAssaybyReduction/Titration
【原文标准名称】:用还原/滴定法对硫基苯并噻唑亚磺酰胺鉴定的标准试验方法
【标准号】:ASTMD4936-2005
【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】:D11.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:分析;化学;亚磺酰胺;试验
【英文主题词】:accelerator;assay;mercaptobenzothiazole;N-cyclohexyl-2-benzothiazolesulfenamide(CBS);N-dicyclohexyl2-benzothiazylsulfenamide(DCBS);N-diisopropyl-2benzothiazylsulfenamide(DIBS);N-tert-butyl-benzothiazole
【摘要】:Thistestmethodisdesignedtoassessthepurityof2-mercaptobenzothiazolesulfenamideaccelerators.Theseproductsareusedincombinationwithsulfurforthevulcanizationofrubber.Thetestmethodissuitableforassessingproductspecificationsinthatthepropertyitmeasuresisrelatedtoproductperformance.Sinceitistheprimarypropertyforcomparisonofproductqualityatdifferentproductionfacilities,goodinterlaboratoryaccuracyandprecisionisrequired.Basedonpastexperience,twosignificantsourcesoferrorinthistestmethodare:(1)incompletereductionand(2)titrationendpointassessment.Problemsintheseareascanbeavoidedbycloselyfollowingtheprocedure.1.1Thistestmethodcoversthedeterminationofassayonmercaptobenzothiazole(MBT)sulfenamides.Itisbasedonatitrationofthebasicaminesliberateduponreductionofthesulfenamideswithhydrogensulfidegas(H2S),or2-mercaptobenzothiazole.1.2Anyfreeamine(HNR2)orweakacidsaltsofthecorrespondingamine(HXHNR2)aretitratedpriortoreduction.Thistiterisusedtocalculatepercentbasicimpurity(asfreeamine)inthesample.1.3Withtheindicatedmodifications,thistestmethodisapplicabletoallMBTsulfenamides,thatis,N-cyclohexyl-2-benzothiazolesulfenamide(CBS),N,N-diisopropyl-2-benzothiazylsulfenamide(DIBS),2(morpholinothio)benzothiazole(MBS),N,N-dicylohexyl-2-benzothiazylsulfenamide(DCBS),N-tert-butyl-benzothiazole-sulfenamide(TBBS),and4-morpholinyl-2-benzothiazyldisulfide(MBSS).1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection.
【中国标准分类号】:A43
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】: