L-SI1_EN surface additives.pdf

《L-SI1_EN surface additives.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

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