Technical Data Sheet LOCTITE 3874 August -2014 PRODUCT DESCRIPTION TYPICAL PROPERTIES OF CURED MATERIAL LOCTITE 3874 provides the followingproduct characteristics: Cured for 24 hours 70 C , followedby 7 days 22 C Physical Properties : Technology Acrylic -6 CoefficientofThermal Expansion, 7610 ChemicalType Acrylic ester -1 ISO 11359-2,K Appearance (uncured) Light grey opaque fluid , No visible CoefficientofThermal Conductivity , ISO8302, 1.25 bubbles. Slight separation offiller W/(mK) LMS acceptable Glass Transition Temperature ,C 49 Components One component - Shore Hardness, ISO 868,Durometer D 72 requires no mixing Elongation,at break ,ISO 37,% 3.2 Viscosity High, thixotropic Initial 22 C. Cure Activator Electrical Properties : Application Bonding 14 Volume Resistivity, IEC60093,cm 4.310 14 LOCTITE 3874 is a thermally conductive adhesive .When used Surface Resistivity, IEC60093, 3.810 with Activator 7387 , it cures rapidly to form a high DielectricBreakdown Strength, 23.6 strength, high modulus, thermoset acrylic polymer . Typical IEC60243-1,kV/mm applications include bonding heat sinks to heat dissipating components such as BGAs in electronics applications. The After 1 week 85C /85% RH thixotropic nature ofLOCTITE 3874 reduces the migration of Electrical Properties : liquid product after applicationtothe substrate . 14 Volume Resistivity, IEC60093,cm 1.510 13 Surface Resistivity, IEC60093, 2.610 TYPICAL PROPERTIES OF UNCURED MATERIAL DielectricBreakdown Strength, 3.5 SpecificGravity 25 C 2.08 IEC60243-1,kV/mm Flash Point -SeeSDS Viscosity, Brookfield -HBT , 25 C, mPas (cP) : LMS SpindleTB ,speed 0.5rpm ,Helipath 800,000 to1,800,000 TYPICAL PERFORMANCE OF CURED MATERIAL LMS SpindleTB ,speed 5 rpm ,Helipath 200,000 to450,000 Adhesive Properties After 24 hours 22 C ,Activator 7387 on 1 side Cure Speed vs. Substrate LapShear Strength, ISO 4587: LMS Steel N/mm 11.7 The rate ofcure will depend on the substrate used. The graph (psi) ( 1,695) below shows the shear strength developedwith time on grit LMS Aluminum N/mm 7 blasted steel lapshears and tested according toISO 4587. (psi) ( 1,015 ) (Activator 7387 appliedtoonesurface). GENERAL INFORMATION 150 This product is not recommended for use in pure oxygen and/or oxygen rich systems and should not be selected as a sealant for 125 chlorine or other strong oxidizing materials. 100 For safe handling information on this product, consult the Safety Data Sheet (SDS). 75 Directions for use: Aluminum to epoxy glass 50 1. For best performance bond surfaces should be clean and free from grease . 25 2. Apply Activator 7387 to one ofthe bond surfaces and the adhesive to the other surface. Parts should be assembled 0 immediately 1min 5min 10min 30min 1h 3h 6h 24h 72h 3. Excess adhesive can be wiped away with organic solvent . Cure Time 4. Bondshould be heldclampeduntil adhesive has fixtured . 5. Product should be allowed to develop full strength before subjecting to any service loads (typically 24 to 72 hours after assembly, depending on bond gap, materials and ambient conditions) . Steel Aluminum % of Full Strength on SteelTDS LOCTITE 3874, August -2014 LMS Loctite Material Specification and use thereof.In light ofthe foregoing,Henkel Corporation specifically disclaims all warranties expressed or implied, including warranties of LMS dated March -07,2003. Test reports foreach batch are available merchantability or fitness for a particular purpose, arising from sale or use forthe indicated properties. LMS test reports include selected QC test of Henkel Corporations products. Henkel Corporation specifically parameters considered appropriatetospecifications forcustomer use. disclaims any liability for consequential or incidental damages of any kind, Additionally, comprehensive controls are in placeto assure product including lost profits. The discussion herein of various processes or quality and consistency. Specialcustomer specificationrequirements compositions is not to be interpreted as representation that they are free from may be coordinatedthrough Henkel Quality. domination ofpatents owned by others or as a license under any Henkel Corporation patents that may cover such processes or compositions. We Storage recommend that each prospective user test his proposedapplicationbefore repetitive use, using this data as a guide. This product may be covered by oneor Store product in the unopened container in a dry location. Storage more United States or foreignpatents or patent applications. information may be indicated on the product container labeling. Optimal Storage: 2 C to 8C. Storage below 2 C or greater than Trademark usage: Exceptas otherwise noted All trademarks in this document 8 C can adversely affect product properties. Material removed are trademarks and/or registered trademarks of Henkel andits affiliates in the from containers may be contaminated during use. Donot return U.S.and elsewhere. product to the original container. Henkel Corporationcannot assume responsibility forproduct which has been contaminated or stored under conditions other than those previously indicated. If additional Reference 1 information is required, please contact your localTechnical Service Center or Customer Service Representative. Conversions (C x 1.8)+ 32 =F kV/mm x 25.4 =V/mil mm /25.4 =inches m /25.4 =mil N x 0.225=lb N/mm x 5.71=lb/in N/mm x 145 =psi MPa x 145 =psi Nm x 8.851 = lbin Nm x 0.738=lbft Nmm x 0.142 =ozin mPas =cP Note: The information provided in this Technical Data Sheet (TDS) including the recommendations for use and applicationofthe product are based on our knowledge and experience ofthe product as at the date ofthis TDS. The product can have a variety ofdifferent applications as well as differing applicationand working conditions in your environment that are beyond our control.Henkel is, therefore,not liableforthe suitability ofour product forthe production processes and conditions in respect ofwhich you use them, as well as the intended applications and results. We strongly recommend that you carry out your own priortrials toconfirm such suitability ofour product. Any liability in respect ofthe information in the Technical Data Sheet or any other written or oral recommendation(s) regarding the concerned product is excluded, except ifotherwise explicitly agreed and except in relation to death or personal injury caused by our negligence and any liability under any applicablemandatory product liability law. In case products are delivered by Henkel Belgium NV, Henkel Electronic Materials NV, Henkel Nederland BV, Henkel Technologies France SAS and Henkel France SA please additionally note the following: In case Henkel would be nevertheless held liable,on whatever legal ground, Henkels liability will in no event exceed the amount ofthe concerned delivery. In case products are delivered by Henkel Colombiana, S.A.S.the following disclaimer is applicable: The information provided in this Technical Data Sheet (TDS) including the recommendations for use and applicationofthe product are based on our knowledge and experience ofthe product as at the date ofthis TDS. Henkel is, therefore,not liableforthe suitability ofour product forthe production processes and conditions in respect ofwhich you use them, as well as the intended applications and results. We strongly recommend that you carry out your own priortrials toconfirm such suitability ofour product. Any liability in respect ofthe information in the Technical Data Sheet or any other written or oral recommendation(s) regarding the concerned product is excluded, except ifotherwise explicitly agreed and except in relation to death or personal injury caused by our negligence and any liability under any applicablemandatory product liability law. In case products are delivered by Henkel Corporation, Resin Technology Group, Inc., or Henkel Canada Corporation, the following disclaimer is applicable: The data contained herein are furnished forinformation only and are believed to be reliable.We cannot assume responsibility forthe results obtained by others over whose methods we have no control. It is the user s responsibility to determine suitability forthe user s purpose ofany production methods mentioned herein and to adoptsuch precautions as may be advisable forthe protectionof property and ofpersons against any hazards that may be involved in the handling HenkelAmericas HenkelEurope HenkelAsia Pacific +949.789.2500 +44.1442.278.000 +86.21.2891.8000 For the most direct access to local sales and technical support visit: www.henkel.com/electronics