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ACCSiliconesLtd,AmberHouse,TrecoS.
R.
L.
,ViaRomagnaN.
8,ShowgroundRoad,Bridgwater,Somerset,UK20098SestoUlteriano(MI),Italia.
Tel.
+44(0)1278411400Fax.
+44(0)1278411444Tel.
39/02/9880913Fax.
+39/02/98280413www.
acc-silicones.
comSE2005(SE2005)2-PartSiliconeEncapsulantIntroductionSE2005isa2-componentroomtemperaturevulcanisingsiliconerubbersystemthatisemployedasanencapsulantforsensitiveelectricalandelectronicassemblies.
ItiscuredbytheadditionofAandBpartstoproduceamoderatelyhardsiliconerubber,whichoffersgoodprotectionagainstchemicalsandenvironmentalcontamination,shockandvibration.
Thecomponentpartshaverelativelylowviscositiesandarereadilymixedinasimple100:1ratio.
KeyFeaturesLowviscosity&goodflowpropertiesDeepsectionCureExcellentdielectricpropertiesProtectsagainstshock,vibrationApplicationsSE2005isrecommendedforpotting,embeddingandencapsulatingdelicateelectricalandelectronicequipment;sealingandcaulking.
UseandCureInformationMixingTheAandBpartsoftherubbermustbemixedthoroughlywithtoproduceauniformlycuredproduct.
Mixingcanbecarriedoutmechanicallyorbyhand,butcareshouldbetakentoavoidtrappingairinthemixturesincethiscancausevoidsinthecuredrubber.
De-aerationForapplicationswheresuchvoidsareundesirablethemixtureshouldbede-aeratedunderreducedpressurebeforeuse.
Thetimeandpressurerequiredforde-aerationdependsonthequantityoftheliquidbeingused.
Asaguide,150gofbaseliquidcanbede-aeratedin5-10minutesatapressureof5-10mmofmercury.
Containersshouldbeonlytwo-thirdsfulltopreventoverflowduringtheinitialstagesofde-aeration.
CuringThecuringprocessbegins,withoutexotherm,immediatelytheliquidandcuringagentaremixedtogether.
Ambienttemperatureandhumidityconditionsareconsideredtobe15to30Cand50to70%RelativeHumidity.
Itisrecommendedthatnoheatshouldbeappliedtoacceleratecureasthiscanhaveadverseeffectsonthepropertiesofthecuredrubber.
CureTime@25C24hrsRevisionDate:21/12/2005PropertyTestMethodValueUncuredProductColourAPart:WhiteColourAPart:ClearAppearance:ViscousLiquidViscosityAPart:Brookfield9000mPa.
sViscosityBPart:Brookfield300mPa.
sCatalysedviscosityBrookfield9000mPa.
sPotLife:60minutes**measuredat23+/-2°Cand65%relativehumidityCuredElastomer(after7dayscureat23+/-2°Cand65%relativehumidity)ColourWhiteTensileStrength:BS903PartA21.
08MPElongationatBreak:BS903PartA2180%YoungsModulus:MPaModulusat100%Strain:BS903PartA2MPaTearStrength:BS903PartA32.
00kN/mHardness:ASTMD2240-9540°ShoreASpecificGravity:BS903PartA1LinearShrinkage:0.
50%ThermalConductivity:0.
24W/mCoefficientofThermalExpansion:Volumetric762ppm/°CLinear254ppm/°CMin.
ServiceTemperature:-50°CMax.
ServiceTemperature:AFS1540B220°CElectricalPropertiesSurfaceResistivityVolumeResistivity:ASTMD-2573E+14.
cmSurfaceResistivity:ASTMD-257DielectricStrength:ASTMD-149>18kV/mmDielectricConstantat1kHz:ASTMD-150DissipationFactorat1MHz:ASTMD-150PowerFactorat1MHz:BS903PartC35E-3FlammabilityUL94V-0RatedNoAdhesionSelfBondingNoAllvaluesaretypicalandshouldnotbeacceptedasaspecification.
HealthandSafety-MaterialSafetyDataSheetsavailableonrequest.
Packages–ACCAdditionencapsulantsaresuppliedinarangeofpacksizespleasecontactthesalesofficefordetailsArrangementscanbemadetosupplyinotherpacksizes.
StorageandShelfLife–Expectedtobe9monthsinoriginal,unopenedcontainersbelow30°C.