新型多功能添加剂对粉末涂料熔体流变学和表面控制的影响.pdf

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1、Influence of Novel Multi-Functional Additive on MeltRheology and Surface Control in Powder CoatingsBernhard Resch Evonik Corporation,BL Coating Additives9/5/20242Industry Trend:Reduction of Curing Temperature and/or TimeA Need for New Additives?Lets have a look130C/266 FUltra-low curefor heat-sensit

2、ive&alternativesubstrates160C/320FNew generationof low cure/fastcure systems200C/392FStandard curesystems3Powder Coating Systems in ComparisonSystem NameCrosslinker/ResinEpoxyPolyamide or anhydride/bisphenol-A-resinHybridBlend of bisphenol-A-resin and COOH-polyesterTGICTriglycidyl isocyanurate/COOH-

3、polyesterTGIC derivativesGlycidylester/COOH-polyesterHAA-Hydroxyalkylamide/COOH-polyesterPURPolyisocyanate/OH-polyester PolyurethaneAcrylicsDi-acid/glycidyl methacrylateGMAFluoropolymersPolyisocyanate/OH-FEVEFunctionalDecorative UsesExterior UsesCorrosion andInsulation ProtectionInterior&StandardWea

4、therabilityLong-term Weather-and Light StableEpoxyPE/Epoxy HybridStandard DurablePolyester(PE)/TGIC&DerivatesHAAPURSuper Durable PE/TGIC&DerivatesHAAPURAcrylicsFluoropolymers4Powder Coating Additives Key Functional PropertiesAirCoatingSubstrateSurface Control:Flow&LevelingCompatibilityRheology Contr

5、olSubstrate WettingOutgassingDegassingAdhesion PromotionSurface Energy:RecoatabilityDispersion&Pigment WettingSurface Modification:MattingTexturingSlip/Mar/Scratch5Powder Coating Additive GroupsAdditive GroupEffectExamplesFlow&LevelingCompatibilitySurface EnergyGloss/Orange PeelDefects controlRecoat

6、abilityDegassing&OutgassingPTFE/Polyethylene/Fischer-TropschPolypropylene,Castor waxPTFE&PTFE-free,CAB,reactive additivesPolyacrylates(on silica carrier)Amide/polyether blendsPinholesPoppingMar&ScratchMatting WaxTexturingBenzoinModified Polyethylenes,Amide waxesSurface slipGloss reductionFine/Coarse