使用非离子反应性表面活性剂提高纯丙烯酸乳液的耐水性

Improving Water Resistance of Pure Acrylic Emulsions with Nonionic Reactive SurfactantsIntroductionCaseWrap up123COATINGS SUSTAINABILITYI. Reduceenvironmental impacts.II. Efficient use of resourcesIII. Increased durability of materialsWaterborne CoatingsEFFECT OF WATER-SOLUBLE SPECIES ON PERFORMANCE OF WATERBORNE PAINTWater resistance DurabilityStabilityShelf-lifeWHY DOES IT HAPPEN?Emulsion PolymerSTAGE ISTAGE IISTAGE IIIFragile FilmContinuous and Transparent FilmCoalesced FilmT>MFFTT>TgWHY DOES IT HAPPEN?HOW TO IMPROVEWATERRESISTANCE?Case 2WATERDIFFUSIONWATERDIFFUSIONWater ResistanceWashedFree-SurfactantFree-SurfactantVanderhoff et. Al., J. Pol. Sci. 1973, 41, 155-174. SurfactantmigrationWaterresistance Conventional surfactantsReactive surfactantsOOCH3HnOOCH2HnSTRATEGYALL-ACRYLIC LATEXADVANTAGES✓Tg✓Mechanical Properties✓UV-resistance✓Hydrolytic resistance✓Oil resistanceMMATg ~ 105°CBATg ~ -54°C✓Interior ✓Exterior paintsALL-ACRYLIC LATEXDISADVANTAGEAll-AcrylicStyreneAcrylic<Source: M.