BYK流平剂(Leveling-agents)

SiliconesandAcrylates有机硅和丙烯酸PetervanDamSurfaceAdditives表面助剂,Page2,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesTopics主题-Surfacetensiontheory表面张力理论-Siliconestoimprovesubstratewetting有机硅促进底材润湿-Formationandpreventionofcraters缩孔的形成和避免-Definitionandimprovementofflowandlevelling流动和流平的定义和流动和流平的定义的改进-Siliconestoadjustsurfaceslip有机硅调整滑爽-Acryliclevellingadditives丙烯酸酯流平剂-Siliconesurfactants有机硅表面活性剂-Dynamicsurfacetensionreduction降低动态表面张力-AcrylatedandOH-functionalproducts丙烯酸酯和羟基改性产品-Silcleanforeasytocleansurfaces表面易清洁产品,Page3,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesDefinitionofsurfacetension表面张力的定义,Page4,PetervanDam,BYK-Chemie,PGMSurfaceAdditives•Moleculesinliquidshavearelativelyhighmobility分子在液体中能相对的高速移动•Inbetweenthemoleculestherearecohesiveforces分子间存在着内聚力•Thehigherthesecohesiveforcesare,thehigherthesurfacetensionwillbeWater73mN/m=strongcohesiveforceshydrocarbons23mN/m=nocohesiveforcesSurfacetension表面张力内聚力越大，表面张力越高水强内聚力烃没有内聚力,Page5,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesObjectiveswhenformulatingcoatings*涂料配方的目标-excellentflowandlevelling优异的流动性和流平性-sufficientsubstratewetting充分的底材润湿-nocrater没有缩孔-aredirectlyrelatedtothesurfacetensionofthiscoating直接关系到该涂料的表面张力-organicmodifiedsiliconesandacrylatesinfluencethesurfacetensioninsuchawaytoimprovetheseproperties改性有机硅和丙烯酸酯通过改变表面张力改善以上特性。,Page6,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesPolydimethylsiloxane聚二甲基硅氧烷(CH3)3SiOSiOSi(CH3)3CH3CH3xHammertone锤纹Flow流动Surfaceslip表面滑爽Defoaming消泡x2-2745-230380-15001800-2900Compatible相容Incompatible不相容,Page7,PetervanDam,BYK-Chemie,PGMSurfaceAdditives(CH3)3SiOSiOSiOSi(CH3)3CH3CH3yxAlkylmN/mCH3CH2CH3(CH2)9CH3212632Organicmodifiedsiloxane有机改性硅氧烷OrganicModificationAlkyl•Polyether聚醚(EO/PO)•Aralkyl芳烷基•Polyester聚酯•reactive反应型-Acrylic丙烯酸-COOH羧酸-OH羟基芳烷基有机改性,Page8,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesSubstratewetting*底材润湿Goodsubstratewetting:良好的底材润湿：paintsubstratenoadditive不含助剂0,1%BYK-333涂料底材,Page9,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesMeasuringsurfacetensionofliquidsusingtheDu-Nouyringmethod(static)使用提环法测量液体的静态表面张力=Fmax-FVL*cos,Page10,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesCMC(criticalmicelleconcentration)insolutionscontainingsurfactants溶液中含表面活性剂的临界胶束浓度1000075706560555045403530252015105011010010000Concentrationmg/LSurfacetensionmN/mSurfactant:表面活性剂Hydrophobic憎水(tail)尾Hydrophilic亲水(head)头WaterSurfaceAir含量表面张力,Page11,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesmN/mAdditivedosage助剂添加量0,050,1Substratewetting*底材润湿,Page12,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesVolumetoSurfaceArea*从体积到表面积50µm10µmV(olume)A(rea),Page13,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesReductionofsurfacetensionwithorganicmodifiedsiloxanes有改性有机硅氧烷降低表面张力Dosage添加量mN/mBYK-300BYK-320BYK-331302928272625BYK-310BYK-333Flow/LevellingSubstratewetting/AntiCratering流动流平底材润湿抗缩孔,Page14,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesOrientationoforganicmodifiedsiloxanes改性有机硅定向SiOCH3CH3SiOCH3(CH3)3SiSiOCH3CH3SiOCH3SiOCH3SiOCH3CH3SiOCH3CH3SiOCH3CH3SiOCH3OSi(CH3)3SiOCH3CH3SiOCH3SiOCH3SiOCH3SiOCH3CH3SiOCH3SiOCH3CH3SiOCH3CH3SiOCH3CH3(CH3)3SiOSi(CH3)3Substrate底材Paint油漆,Page15,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesTypicalsurfacetensions*各物质的表面张力whitespirit白电油Melamineresin氨基树脂80706050403020Phosphatizedsteel磷化钢材Water水Alkydresin醇酸树脂Acrylate丙烯酸SMC-Polyester聚酯mN/mSolvents溶剂Resins树脂Subtrates底材water-borne水性Xylene二甲苯Untreatedsteel无处理钢材Polypropylene聚丙烯,Page16,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesSubstratewettingandinterfacesduringcoatingapplication涂料施工中的底材润湿和界面状况Wetpaintwithsilicone=29mN/mSolventEvaporation溶剂挥发Paintwithsilicone=29mN/mWetpaintwithoutsilicone=30mN/mSolventEvaporation溶剂挥发Paintwithoutsilicone=33mN/m涂料不含有基硅Substrate=31mN/m底材,Page17,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesSurfaceEffectsQ表面效果Causesforandovercomingofsurfacedefects表面缺陷的原因和解决办法,Page18,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesCrater(contaminationfromoutside)缩孔（受外因影响）Particle/粒子Droplet/液滴Dirt污垢(28mN)Paint油漆(30mN)Substrate底材32mN,Page19,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesCrater(contaminationofthesubstrate)缩孔（底材被污染）Droplet/Dirt液滴/污垢(28mN)Paint油漆(30mN)Substrate底材32mN,Page20,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesCraterformation缩孔的形成Paintdropletintowetpaint涂料滴进湿膜中left:samesurfacetension左：相同表面张力right:dropletwithlowersurfacetension右：液滴表面张力更低,Page21,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesLevelling:definition流平：定义Levelling(smallestpossibleinterfaceliquid/air)Afterapplication施工后Afterdrying干燥后流平（尽可能小的气/液界面）,Page22,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesFlowandLevelling流动和流平Whatinfluencesflowandlevelling?影响流动和流平的因素？•Rheology触变性•Time时间•Surfacetension表面张力•Bénardcells贝纳德漩涡Howtoimproveflowandlevelling?如何改善流动和流平？•DeflocculatingW+D-additives(rheologyinpigmentedsystems)解絮凝润湿分散剂（在颜料体系中触变）•Solvents(dryingtime)溶剂（干燥时间）•Resins树脂•Additives(SurfaceTension)助剂（表面张力）,Page23,PetervanDam,BYK-Chemie,PGMSurfaceAdditivesAdjustingflowandlevelling调节流动和流平Whatimproveslevellingmost:highorlowsurfacetension?如何改善流平？表面张力高还是低？Surfacetension=484mN/m表面张力＝484mN/mhighersurfacetension=betterlevelling!更高的表面张力＝更好的流平！Smallestsurfacearea=excellentlevelli