提高水性外墙涂料性能的先进聚合物策略.pdf

1、Advanced Polymer Strategies for Enhancing the Performance ofWater-Based Exterior CoatingsCoatings Trends&Technologies ConferenceSeptember 2024AgendaPerformance needs for water-based Exterior CoatingsOverview of Polymer Design TechniquesMulti-phase polymersNanoparticle size emulsionsFunctionalization

2、Polymerizable Surfactant TechnologiesLeveraging polymer design to enhance coating performanceWater-based Exterior CoatingsWater-based exterior coatings have come along way in the last 30 years.VOC regulations have accelerated changeWith movement to lower VOC,emulsionpolymer technology has modernized

3、 toimprove performance with lower coalescentloadingKey Performance PropertiesGloss and color retentionDirt Pickup ResistanceWater resistance performanceSufficient hardness yet flexibleCARB Architectural Coatings VOCSuggested Control Measure Limits g/LYearAdoptedFlatNon-FlatHighGlossImple-mented19891

4、5025020001001502501/1/20032007501001501/1/2010201950501/1/2022Key Performance Properties forWater-Based Exterior CoatingsGloss and Color RetentionInteractions between binder and pigments play asignificant role in determining gloss and appearance of acoating surfaceUV light and weather effects cause

5、degradation over timeMany thermoplastic acrylic polymers are generally UVresistant though coatings can vary in their performanceFactors affecting gloss and color retention for an acryliccoatingInitial surface uniformity and roughnessEfficiency of coalescence and film formationDegree of crosslinkingG

6、loss and Color RetentionFilm coalescence model of neat LatexLatex polymer impacts on gloss and colorretention:Efficient latex particle flow,wetting,andpigment interactionsPoor pigment coverage can lead to larger areaof exposed colored pigments vulnerable to UVdegradationPresence and speed of crossli