海明斯流变培训

DefinitionofVISCOSITYViscosity(ResistancetoFlow)=ShearStressShearRate(τ)(γ).ShearStress(τ)(liquidlayers)A=area(m)2Fτ=shearstress=FA(Newton/m)2=shearrate=VX=msec=.1m1secγ.ShearRate(γ)or(sec).-1X(m)V=velocity(m/sec)HighSpeedDisperserShearRatedVAssumptions:LinearTipSpeed(V)=4,500ft/mind=1footShearRate=Vd=4,500ft/min1ft75ft/sec1ft=ShearRate=751/secUnpigmentedsystemApplicationShearRatesWetPaintFilm(0.003thick)V=30/secShearRate=Vd=30/sec0.003=10,000sec-10.0010.010.11101001000100000.010.1110100100010000100000pseudoplasticηviscosity(Pa?s)γshearrate(sec).-10.0010.010.11101001000100000.010.1110100100010000100000thixotropicγshearrate(sec).-1ηviscosity(Pa?s)Time(sec)FastRecoverySlowerRecoveryViscosityRecoveryAfterApplicationηviscosity(Pa?s)0.0010.010.11101001000100001000000.010.11101001000storagetransportationpost-applicationsaglevelingsettlingpackageappearanceandfeelbrushingsprayingrollingprocessingapplicationRelationshipofshearratetocoatingspropertiesγshearrate(sec).-1ηviscosity(Pa?s)0.0010.010.11101001000100001000000.1110100100010000.85KUABViscosityProfiles2RA'satequalmPa?sγshearrate(sec).-1ηviscosity(Pa?s)0.0010.010.11101001000100000.11101001000100001000001000000OrganoclayPolyesteramidesCastorBasedThixotropeηviscosity(Pa?s)γshearrate(sec).-1PolyolefinwaxesGeneralPerformancePropertiesPRODUCTBENTONE®OrganoclaysTHIXCIN®,THIXATROL®OrganicThixotropesM-P-A®antisettlingagentsADVANTAGES•Widesolventutility•Doesnotseed•Maintainsrheologyathightemperatures•EasiertousethanorganicsSD’seasiestofalltouse•Bestrheology•Highlythixotropic•Bestfilmbuild•Bestflow&leveling•HighestGloss•Polyesteramidesdonotseed•Widesolventutility•Donotseed•PigmentsuspensionwithoutviscositybuildDISADVANTAGES•Lessthixotropythanorganics•PoorerLevelingthanorganics•Moreaffectonglossthanorganics•Conventionsrequirehighshearandactivation•Limitedsolventutility•Castortypespronetoseeding•Loserheologyathightemperatures•Requirehighshear,dwelltimeandprecisetemperatures•Coatingmustbecooledbeforepackout(castortypes)•Requireshear,heatanddwelltime•WeakthixotropesBENTONE®rheologicaladditivesNRRRCl-OHHOOHOHNa+Na+Na+Na+R+quatchloridesodiumbentoniteMakinganOrganoclayOHOHOHOHHHOOHOHHHONNNNNNBENTONE®OrganoclayGellingMechanismAgglomeratedDe-agglomerationPolarActivatedWithConventionalFullyActivated&DispersedshearwettingshearUseAreas-ORGANOCLAYSNOTemperatureRequirementsALIPHATICSMineralSpiritsIsopar’sNaptha’sAROMATICSXyleneTolueneHisol,SolvessoOXYGENATEDEstersKetonesAlcoholBENTONE®34UnderIdealDispersionConditionsMostEfficientCostEffectiveBENTONE®27UnderIdealDispersionConditionsMostEfficientBENTONE®1000PoorWettingSystemse.g.freeoils,highsolids,etc.MostEfficientBENTONE®52CostEffectiveOffsetforHTandTEtypesBENTONE®57CostEffectiveOffsetforTixogelVZtypesBENTONE®38UnderIdealDispersionConditionsMostEfficientPolar(chemical)Activators%basedonorganoclaywt.Methanol(+5%H2O)33Ethanol(+5%H2O)50PropyleneCarbonate(asisor+5%H2O)33ProprietaryPolarActivators50-100UseAreas-ORGANOCLAYSNOTemperatureRequirementsALIPHATICSMineralSpiritsIsopar’sNaptha’sAROMATICSXyleneTolueneHisol,SolvessoOXYGENATEDEstersKetonesAlcoholBENTONESD®-1BestChoiceUnderLowShear,Non-OptimumConditionsBENTONESD®-2Bestfor:HighSolids,PoorWetting&LowShearConditionsBENTONESD®-3EasiertoDispersew/oPolarActivatorNotforPostAddBut,forbestresultsavoidtemperatures60°F/16°CConventionalSuper-Dispersible40AºaverageOrganoclayd001SpacingDistributionIncorporationShear:Nil10%Gel:1.5KmPa·sLIGHTNIN’MIXERIncorporationShear:~10Ksec-110%Gel:40K-60KmPa·sDISPERSATORIncorporationShear:300Ksec-110%Gel:1.5-2.0millionmPa·sHomogenizerORGANOCLAYSAdvantagesWidesolventutilityThixotropicviscositybuildStablerheologyoverawidetemperaturerangeEasiertousethenorganicsSD’seasiestofallCannotbeoverprocessedGoodsag/slumpcontrolExcellentsuspensionandsyneresiscontrolDisadvantagesConventionalsrequirehighshearandpolaractivationLessthixotropiccomparedwithcastortypeadditivesMaybedegelledbycertainadditivesBENTONE®&BENTONESD®OrganoclayPregelsWhyPregel?•MaximumEfficiency•MaximumReproducibilityBENTONE®&BENTONESD®OrganoclayPregelsBENTONE®Pregels•Millbaseincorporation•AddanywhereBENTONESD®Pregels-Millbase-Postcorrection-Stains&varnishes-Highsolids&100%solidsBENTONE®&BENTONESD®OrganoclayPregelsPregelsolventcontentVeryhighsolids/100%NVSystems•ToohighforsystemSolution:DryaddBENTONESD®+PolarActivatorBENTONESD®OrganoclayPregels-Postcorrection•Verylowshearlevels-Minimallypigmentedstains&varnishes•Temperatures70ºF(21ºC)-Poorwetters(hisolids&100%NVsystems)•epoxies•polyesters•polyurethanesOrganoclayPregelsTradeSalesApplicationsFormula1Formula2Formula3MS66/388.1MS66/386.5MS66/388.0BENTONESD-110.4BENTONESD-110.2BENTONE348.0MeOH(95:5)1.5AntiTerraU3.3MeOH(95:5)1.0AntiTerraU3.0Disperse8minutesat3,000rpmDisperse8minutesat3,000rpmDisperse15-20minutesat3,000rpm100.0100.0100.0FOG7.5+7.5+7.5+FluidityHighMedMedOrganoclayPregelsHighSolventStrengthApplicationsFormula4Formula5Formula6Xylene60.0Xylene60.0Isopropanol67.6Toluene7.0n-Butanol30.0MEK20.7BENTONESD-29.2BENTONESD-230.0BENTONESD-211.7Disperse10’at2,000