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1、SubstanceforSuccess.TechnicalInformationL-SI1SurfaceAdditivesTechnicalInformationL-SI1SurfaceAdditivesContentSurfaceDefects–CausesandPreventionPage3ChemicalBuildingBlocksofPolysiloxanesPage4-6ChemicalBuildingBlocksofPolyacrylatesPage7UsesforSurfaceAdditives:SubstrateWet
2、tingPage8Flooding&Floating,Flow,Air-DraftSensitivityPage9-10Anti-cratering,DefoamingPage11SurfaceSlip,TapeReleasePage1ImprovingtheEaseofSurfaceCleaningPage13SiliconeAdditivesandtheirInfluenceonIntercoatAdhesionPage14-15TechnicalInformationL-SI1SurfaceDefects–Causesand
3、PreventionSurfacedefectsoftenoccurduringandInadditiontopolysiloxanesandInsufficientSubstrateWettingaftercoatingapplication.Thesedefectspolyacrylates,lowmolecularweightdegradeboththeopticalpropertiesofsurfactantsarealsoavailable.Duetothecoatinganditsabilitytoprotecttheth
4、eirtypicalsurfactantstructure(polar/substrate.Typicaldefectsareshownnon-polarsegments)theyaresurfacebelow:activeandcanbeusedtoreducesurfacetensions.?Poorsubstratewetting(figure1)?Craterformation(figure)?FormationofBénardcells(figure3)andflooding?Non-optimalflow(orangep
5、eel)(figure4)?Air-Draftsensitivity.Oneverysignificantparameteraffectingallthesedefectsisthesurfacetensionoftheinvolvedmaterials.Morefigure1specifically,surfacetensiondifferencesaretheactualcauseofthesesurfaceCratersdefects.Thesourceofsurfacetensiondifferencescanbewithin
6、thesystemitself(solventevaporationorthecrosslinkingreactionoftheresin)orexternalsources;(overspray,dustparticles,orcontaminationofthesubstrate).Topreventsurfacetensiondefects,additivesmaybeused.Theymodifythesurfacetensionofthepaintand/orminimizesurfacetensiondifferences
7、.Basically,thecompositionoftheseproductsarepolysiloxanesorpolyacrylates.Ifconsiderablesurfacetensiondifferencesmustbeequalized,polysiloxanescanbeused.Theywill–dependingontheirchemicalstructure–figurestronglyreducethesurfacetensionoftheliquidpaint.Theycanbeusedforimprov
8、ingthesubstratewettingandasBénardCellsInsufficientFlowanticrateringadditives.Iftheyaresufficientlyincompatible
