Tralopyril
Itisametal-freeantifoulingagentforuseinantifoulingpaintsforshiphullsorothermarinestructures.thisproducthasabroadspectrumofactivityagainsthard-shelledandsoft-bodiedinvertebrateanimalfoulingorganisms.Becauseofitschemicalandphysicalstabilityincoatings,thelowwatersolubilityandleachability,thisproductcontainingantifoulingpaintscanoftenbespecifiedformulti-yeardry-dockingintervalscomparabletothoseachievedwithcopper-basedproducts.
GeneralInformation
CommonName(ISO) Tralopyril
IUPACName 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile
CASName :1H-Pyrrole-3-carbonitrile,4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)
CASRegistryNo.
MolecularFormula C12H5BrClF3N2
MolecularWeight 349.5
ChemicalAndPhysicalProperties
Thesepropertiesaretypicalbutdonotconstitutespecifications:
Appearance Whitetooff-whitepowder
Purity(Chromatography) Minimum98.0%w/w
WaterContent(Karl-FisherTitration) Maximum0.5%w/w
ParticleSizeDistribution(LaserDiffraction) D50:4.0-10.0µm;D99:maximum25.0µm
OilAbsorptionValue(ISO787-5) 28mlper100g
Density 1.714g/mlat20°C
VapourPressure 1.9x10-8Paat20°C;4.6x10-8Paat25°C
DissociationConstant pKa=7.08at26°C
pH 5.16at22°C(0.1%w/vdispersionindistilledwater)
SolubilityInWaterAndOrganicSolvents
SolubilityinWater
ColumnElution Solubility,inmg/l,at20°C
DistilledWater(pH4.9) 0.17
ArtificialSeawater(pH8.1) 0.16
SolubilityinOrganicSolvents
Solubility,ing/l,at20°C
Acetone
Ethylacetate
Methanol
n-Octanol
n-Heptane
Xylene
ChemicalStabilityAndCompatibility
Therearenoknownincompatibilitiesbetweenthisproductandbinderresins,pigments,fillers,solventsoradditivesthatarecommonlyusedinantifoulingpaints.thisproductispronetohydrolysisandphotolysisindiluteaqueoussolutions.However,ithasbeendemonstratedthatthisproductcanbeusedinwater-borneantifoulingpaintswithoutanystabilityissues.Photolysisofthisproductwillnormallynotoccurinpigmentedcoatingsystems.
ThermalStability
thisproductexhibitsexcellentthermalstability.IndynamicalDifferentialScanningCalorimetry(DSC)inopenatmosphereonlymelting(±249º)andendothermaldecompositionwasobserved.InadynamicalDSCrununderclosedconditionsalargeexothermwasmeasuredfrom±230º(325J/g),withmeltingduringtheexotherm.
ShelfLife
Ifstoredatambienttemperature,intheoriginalsealedcontainer,thisproductTechnicalhasaninitialshelflifeoffiveyears.
AntifoulingPaintFormulation
thisproductisfitforuseindifferenttypesofantifoulingpaintincludingtraditionalrosin-basedControlledDepletionPolymer(CDP)painttypes,aswellasSelf-PolishingCopolymer(SPC)systems.
Itisrecommendedtousethisproductinconjunctionwithasoftfoulingagenttoensurecompleteprotectionagainstbothhardandsoftfouling.
RecommendedUseLevels
Effectiveuselevelsofthisproductincopper-freeantifoulingpaintsaretypicallybetween4and6percentbyweight(ontotalformula,wetpaint).Alternatively,thisproductcanbeusedinconjunctionwithacopper-basedbiocide,eithertoreducethecopperlevelwithoutsacrificingperformanceortoincreasetheperformanceand/orservicelifeofcopper-basedproducts.
Advantages:
Metal-freeantifoulingagent
• Lowuseconcentrationsprovidecost-effectivealternativetocopper-basedantifoulants
• Broadspectrumcontrolofhardfoulingorganisms
• Long-lastingefficacy
• Effectiveinmarineandfreshwaterenvironments
• Breaksdownrapidlyintheaquaticenvironment
• Doesnotinducegalvaniccorrosion,particularlysuitableformetalhullsincludingaluminium
• Providespaintformulationflexibilityincludingbrightcoloursandimprovedcolourretention,lowerVOCaswellaswaterbasedpaints
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