chemical structure. dissolution association advantages low viscosity and easy handling. stable...
TRANSCRIPT
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CHEMICAL STRUCTURE
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DISSOLUTION
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ASSOCIATION
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ADVANTAGES
• Low viscosity and easy handling.
• Stable viscosity at wide P H range.
• Stable viscosity in long term store.
• Stable from Microbes & Enzymes.
• Any rheology of the paint is possible.
• Cost saving
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HISOL DAlkali Swellable Associative Thickener
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Classification of HISOL D
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CONVENTIONAL THICKENER
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VOLUME RESTRICTION FLOCCULATION
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Spatter
• Paints using conventional thickenersHEC). Volume restriction flocculation : Shear thinning effect : spatter.
• Paints using associative thickeners :
Lower spatter when roll application.• Estimate of the roll spatter. • Spatter test : Roll 7x2 inch, 1 inch nap, 2ft/sec, 12g of
paint, 1x2 ft wallboard. Spatter collection : 9x12 in. Black paper. One feet below the vertical wallboard.
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Spatter test
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Spatter test of Interior paint
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Estimate of the Spatter
• Roughly : High shear viscosity (shear rate : 10,000/sec).
• More exactly : Extensional Viscosity
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Extentional Viscosity
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Measurement
• Spinning apparatus (Measure the Extensional Viscosity)
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RHEOLOGY OF THE WATER BASE PAINTS
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PAINT FLOW
• Adjust flow balance Better one coat coverage. Sagging balance.
• Estimation Low shear viscosity : Graph Sag-meter, Leveling gauge Zhan cup viscosity.
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PICTURE(1)
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PICTURE 2
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Selection Guide
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Paint Formulation
• HS-formula