Technical Data Sheet LOCTITE 641 - Industrial GP

1 TechnicalDataSheet LOCTITE 641 May-2004 PRODUCTDESCRIPTIONLOCTITE 641provides thefollowingproductcharacteristics:Techn ologyAcrylicChemicalTypeMethacrylateEste rAppearance(uncured)Yellow liquidLMSF luorescenceNegativeComponentsOne component - requiresnomixingViscosityMediumCureAnaer obicSecondaryCureActivatorApplicationRet ainingStrengthMediumLOCTITE 641is designedforthebondingof cylindricalfittingparts,particularlywher edisassemblyisrequiredforserviceoperatio ns. Theproductcureswhenconfinedin theabsenceofairbetweenclosefittingmetals urfacesandpreventslooseningandleakagefro mshockandvibration. Typicalapplicationsincluderetentionof @ 25 SeeMSDSV iscosity,Brookfield - RVT, 25 C,mPa s(cP):Spindle2, ,215 to2,750 LMSS pindle2, speed20rpm400 to800 LMSV iscosity, EN12092 -MV, 25 C,after180s, mPa s(cP):Shearrate277s-190 Thegraphbelowshowsthe shearstrengthdevelopedwithtimeonsteelpin sandcollarscomparedtodifferentmaterialsa ndtestedaccordingto of Full Strength on SteelCure Time10075502501min5min10min30min1h3h6h24 h72hSteelAluminumZinc of Full Strength on SteelCure Thegraphbelowshowsthe shearstrengthdevelopedwithtimeatdifferen ttemperaturesonsteelpinsandcollarsandtes tedaccordingto of Full Strength on SteelCure Time10075502501min5min10min30min1h3h6h24 h72h40 C22 C5 ,orlargegapsarepresent,applyingactivator tothesurfacewillimprovecurespeed.

2 Thegraphbelowshowsshearstrengthdeveloped withtimeusingActivator 7471and7649onzincdichromatesteelpinsandc ollarsandtestedaccordingto of Full Strength on SteelCure Time10075502501min5min10min30min1h3h6h24 h72hActivator 7471 Activator 7649No ActivatorTDSLOCTITE 641, May-2004 TYPICALPROPERTIESOFCUREDMATERIALP hysicalProperties:Coefficientof ThermalExpansion, ASTMD 696, K-180 10-6 Coefficientof ThermalConductivity,ASTMC 177,W/(m K) ,kJ/(kg K) 24 hours @22 CCompressiveShearStrength, ISO10123:Steelpinsandcollars N/mm (psi) (940)TYPICALENVIRONMENTAL RESISTANCEC uredfor 1 week @22 CCompressiveShearStrength, ISO10123:SteelpinsandcollarsHotStrengthT estedat temperature% RT StrengthTemperature, C1007550250050100150 HeatAgingAgedat temperatureindicatedandtested @22 C% Initial Strength at RTHours100755025001000200030004000500012 0 C150 CChemical/SolventResistanceAgedundercond itionsindicatedandtested @22 C.

3 %ofinitialstrengthEnvironment C100hr500hr1000hrMotorOil125959590 UnleadedPetrol2210010095 Brakefluid22100100100 WaterGlycol50/5087909090 Ethanol22100100100 Acetone221008080 GENERALINFORMATIONT hisproductisnotrecommendedforuseinpureox ygenand/oroxygenrichsystemsandshouldnotb eselectedasa ,consulttheMaterialSafetyDataSheet(MSDS) .Whereaqueouswashingsystemsareusedtoclea nthesurfacesbeforebonding,itisimportantt ocheckforcompatibilityofthewashingsoluti onwiththeadhesive. Insomecasestheseaqueouswashescanaffectth ecureandperformanceof notnormallyrecommendedforuseonplastics(p articularlythermoplasticmaterialswherest resscrackingoftheplasticcouldresult). Usersarerecommendedtoconfirmcompatibilit yof ,cleanall surfaces(externalandinternal)witha Loctitecleaningsolvent andallowto thematerialis aninactivemetalorthecurespeedis toslow,spraywith Activator7471or7649 and allow , applyadhesivearoundtheleadingedgeofthepi nandthe insideofthecollarandusea , , theassemblyto approximately250 C.

4 + + + 641, May-2004 LoctiteMaterialSpecificationLMSLMS datedSeptember-1, 1995. Testreportsforeachbatchareavailableforth eindicatedproperties. LMStestreportsincludeselectedQCtestparam etersconsideredappropriatetospecificatio nsforcustomeruse. Additionally,comprehensivecontrolsareinp lacetoassureproductqualityandconsistency . drylocation. : 8 Cto21 C. Storagebelow8 Corgreaterthan28 Donotreturnproducttotheoriginalcontainer . additionalinformationis required, ( Cx )+ 32= FkV/mmx V/milmm/ inchesN x lbN/mmx lb/inN/mm x 145= psiMPax 145= psiN m x mm s= cPNoteThedatacontainedhereinarefurnished forinformationonlyandarebelievedtobereli able. Wecannotassumeresponsibilityfortheresult sobtainedbyothersoverwhosemethodswehaven ocontrol. It istheuser'sresponsibilitytodeterminesuit abilityfortheuser' ,HenkelCorporationspecificallydisclaimsa llwarrantiesexpressedorimplied,including warrantiesofmerchantabilityorfitnessfora particularpurpose,arisingfromsaleoruseof HenkelCorporation sproducts.

5 HenkelCorporationspecificallydisclaimsan yliabilityforconsequentialorincidentalda magesofanykind,includinglostprofits. Thediscussionhereinofvariousprocessesorc ompositionsisnottobeinterpretedasreprese ntationthattheyarefreefromdominationofpa tentsownedbyothersorasa licenseunderanyHenkelCorporationpatentst hatmaycoversuchprocessesorcompositions. Werecommendthateachprospectiveusertesthi sproposedapplicationbeforerepetitiveuse, usingthisdataasa guide. a trademarkof + + +