高固体含量、不含 TEA 的水性聚氨酯分散体.pdf

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1、High-Solids TEA-Free WaterbornePolyurethane DispersionsMark WolfingerTechnical Marketing ManagerLubrizol Advanced Materials,Inc.IntroductionSustainability TargetsBenefits of High SolidsIntroduction to High Solids Polyurethane DispersionsHSPUD1HSPUD2HSPUD3Conclusions2AgendaPolymer made from segments

2、of amorphous(soft)blocks and crystalline(hard)blocksTend to have better toughness and resistance properties compared to polyacrylatesPerformance is strongly influenced by soft segmentPolyurethane polymer chains can be modified to be dispersible in water formingpolyurethane dispersions3Introduction:W

3、hat is a Polyurethane?SoftHardCrystallineAmorphous4Polyurethane Soft SegmentsPolyether polyolGood hydrolytic stability,Poor UV resistancePolycarbonate polyolGood UV and hydrolytic stability,highprice and limited composition variabilityPolyester polyolGood mechanical properties andUV resistance,Poor

4、hydrolytic stabilityPolyamide polyolExcellent mechanical propertiesHydrolytic stability PolyesterUV resistance PolyetherComposition flexibility Polycarbonate5Typical Polyurethane Dispersion(PUD)Multiple compositional drivers which affect critical performance properties.Polyol(Soft segment)Poly-Isocy

5、anate(Hard segment)DiluentFunctional Diol(Water dispersing)Process Aid(viscosity control)Tertiary amineNeutralizer+DriverPropertiesMechanicalpropertiesChemicalresistancePUD functionalityDispersion stabilityFilm formationPotentialHazardous airpollutantMechanicalpropertiesChemicalresistanceWater resis

6、tanceSolids content of PUDs are typically limited by polymer design choicesPolymer and particle morphology can be constrained when synthesizing highhardness PUDsHigh solids PUDs currently availableVery soft or elastomericTextile and other flexible substrate applicationsLow MW polyols 2K system with