【英文标准名称】:StandardTestMethodforRubberCompoundingMaterials:2-BenzothiazylSulfenamideAccelerators-Insolubles
【原文标准名称】:橡胶合成材料的标准试验方法:2-苯并噻唑基亚磺酰胺催化剂.不溶解性
【标准号】:ASTMD4934-2002(2006)
【标准状态】:现行
【国别】:
【发布日期】:2002
【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;橡胶工业;亚磺酰胺;测试
【英文主题词】:insolubles;mercaptobenzothiazole(MBT);mercaptobenzothiazoledisulfide(MBTS);rubberaccelerators;rubberchemicals;2-benzothiazolesulfenamides
【摘要】:Sulfenamidescandegradeinchemicalpurityandfunctionalperformance,usuallycharacterizedbyadropinassay,areleaseoffreeamine,andanincreaseininsolubles.Thistestmethodmaybeusedasanindicationofsuchdegradation.SinceMBTS(mercaptobenzothiazoledisulfide)isaprimarydegradationproductofsulfenamides,thedeterminationofMBTSisameansofassessingpossibledegradationofsulfenamides.Insolublesareameansofmercaptobenzothiazyldisulfide(MBTS)contentofthesulfenamide;MBTSisaprimarydegradationproductofsulfenamides.Aminesaltsofmercaptobenzothiazole(MBT)mayalsobeinsoluble.However,certainsolublespeciesmayalsobegeneratedduringsulfenamidedegradation.Consequently,insolublesarenotanabsolutemeasureofpurityandcanactuallydecreasewithsulfenamidedegradation.1.1Thistestmethodcoversageneralprocedureforthedeterminationofinsolubleimpuritiesofsulfenamidesinsuitableorganicsolvents.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G34
【国际标准分类号】:83_040_20
【页数】:3P.;A4
【正文语种】: