用于木地板和家具应用的新型高性能水性油改性聚氨酯.pdf

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1、Novel High Performance WaterborneOil-modified Urethane for WoodFlooring and Furniture ApplicationsPengxu Qi,Ph.D.Group Leader,R&D Application TestingPolynt Composites USA Inc.Email:A Glance at the Polynt Group2Benefit of Urethanes3Structural ElementChemicalWeatheringFlexibilityHardnessAbrasionHeatWa

2、terAliphatic hydrocarbon chainsGoodExcellentGoodGoodGoodGoodV.GoodAromatic hydrocarbon chainsExcellentPoorFairExcellentExcellentV.GoodExcellentAlkoxy groupsFairGoodExcellentPoorGoodPoorPoorEster linkagesPoorGoodExcellentFairGoodPoorGoodUrea linkagesGoodPoorPoorExcellentFairGoodGoodUrethane linkagesG

3、oodGoodGoodGoodExcellentGoodGoodAllophanate groupsFairExcellentFairGoodGoodFairGoodAmide linkagesFairPoorGoodGoodGoodFairFairLinearityGoodV.GoodExcellentFairFairPoorDependsLow molecular weightPoorPoorFairFairGoodPoorPoorHigh molecular weightGoodGoodGoodGoodGoodFairV.GoodHigh crosslink densityExcelle

4、ntFairPoorExcellentV.GoodV.GoodGood Toughness Soft but not tacky Hard but not brittleo Mechanical propertieso Abrasion resistance Segmentation Moderate Hydrogen BondingUniqueness of Urethanes4N C NHHON CHON C OHOC OOEsterUrethaneAmideUreaIncreasing H-Bond StrengthStrainStresstoughnessStressStraintou

5、ghnessstrong,not toughstrong and toughStressnot strong,not toughStrain(elongation)Santamaria-Echart,A.;Fernandes,I.;Barreiro,F.;Corcuera,M.A.;Eceiza,A.Advances in Waterborne Polyurethane and Polyurethane-Urea Dispersions and Their Eco-friendly Derivatives:A Review.Polymers 2021,13,409.Solventborne v

6、s Waterborne Solvent-borne systems High VOC 275 g/L Cost effective High hydrolytic stability Fewer coats needed High gloss values Waterborne systems Low VOC 275 g/L Fast-property development High molecular weight Excellent wear resistance Little to no odor Easy clean-up with water5SCAQMD275 g/LOTC35