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Relationship between Weather-Resistance and Mixing Ratio of Mill-Base and Let-Down Silicone/Acrylic Resins  

Jo Hye-Jin (Department of Chemical Engineering, Myongji University)
Shim Il-Woo (Department of Chemical Engineering, Myongji University)
Hahm Hyun-Sik (Department of Chemical Engineering, Myongji University)
Park Hong-Soo (Department of Chemical Engineering, Myongji University)
Publication Information
Polymer(Korea) / v.30, no.4, 2006 , pp. 350-356 More about this Journal
Abstract
In order to investigate the effect of the composition of weather-resistant coatings on physical properties, three different weather-resistant coatings were prepared by varying the ratio of a mill-base silicone/acrylic resin and let-down silicone/acrylic resin in weight ratios of 2 : 8, 3 : 7, and 4 : 6. The physical properties and weather-resistance of the prepared coatings were tested. It was found that the thermal stability, salt spray exposure, and weather-resistance were improved with increasing the amount of silicone. The optimum mixing ratio of mill-base silicone/acrylic resin to the let-down silicone/acrylic resin was 2 : 8. The coating containing silicone component of 30 wt% was found to be suitable as high weather-resistant coatings.
Keywords
mill-base; let-down; silicone/acrylic resin; weather-resistant coatings;
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