کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
694218 | 889937 | 2007 | 7 صفحه PDF | دانلود رایگان |
In the present study, a 2-pack polyurethane clear coat curable at ambient conditions was selected. Two different types of nano-silica (i.e. hydrophilic and hydrophobic nano-silica) were employed as fillers in order to vary the properties of the resultant nano-composite polyurethane coatings.Various morphological, mechanical, rheological and optical properties of such coatings were investigated. The results showed that coatings based on hydrophilic nano-silica gave a less transparent more UV absorbent coating. However, coatings based on hydrophobic nano-silica gave more miscible, transparent coating having improved mechanical properties especially scratch resistance. In the fluid state these coatings showed shear thinning behavior. The optimum range of adding 4–8% by weight of hydrophobic nano-silica to the chosen 2-pack acrylic polyol polyurethane clear coat gave optimal morphological, rheological, mechanical and optical properties to the final nano-composite coatings.
Journal: Progress in Organic Coatings - Volume 59, Issue 1, 2 April 2007, Pages 81–87