Dirt Pick-Up Resistance 之战.pdf

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1、1The Dirt Pick-UpResistance BattleTerri John-SynthomerTechnical Service Manager21.Definition2.Factors Affecting DPUR3.Test Methods4.Accelerated Testing Data5.Exterior Exposure Data6.Summary3What is Dirt Pick-Up Resistance?Dirt pick-up resistance(DPUR)is a coatings ability to resist discoloration due

2、 to the deposition of particles from theenvironment.Why is Dirt Pick-Up Resistance important?Aesthetics-Dirty buildings are not very attractivePotential Energy savingsCoatings which are white in color and cleaner reflect the sun better and can assist in keeping a building coolerCost Containment-Save

3、s money and time on cleaning and repaintingSome types of building stains or discoloration are only cosmetic,while others may indicate growths that couldreduce coating service life such as on siding,or trim.The Dirt Pick-Up Resistance BattleDirt Pick-Up Resistance4The Dirt Pick-Up Resistance BattleFa

4、ctors Affecting Dirt Pick-Up Resistance15The Dirt Pick-Up Resistance BattleWhy is Better Dirt Pick-Up Resistance Needed?Growth in the development of“softer”elastomeric wall and roof coatingsIn urban or industrial areas airborne dust is a persistent problem.Continued construction of high-rise commerc

5、ial buildings creating the need for coatings that areeasier to clean and maintain.In existing high-rise building exterior maintenance and cleaning represent the highest cost.Market demand for low-VOC formulationsUsually resulting in tackier coatings with worse dirt pick-up resistanceEnvironmental re

6、gulations throughout the U.S.Third party certifications such as Green SealImproved dirt pick-up resistance will extend the paint service life6The Dirt Pick-Up Resistance BattleAccumulation of DirtDeposition of DirtAdhesion andEntrenchmentShedding andRelease2Theaccumulationof dirt on asurface canbe b