استفاده از روش هيبريدهاي آلي - معدني در روكشهاي شفاف خودرويي مقاوم در برابر خراش

Application of Sol-Gel Process for Preparation of Scratch Resistance Organic - Inorganic Clear Coat

An Organic-Inorganic automotive clear coat was studied by incorporation of Tetraethyl Ortho Silicate (TEOS) with different fresh and aged conditions. The aim of this work was to achieve better mar and scratch resistance for solvent borne acrylic-melamine automotive clear coats. Inorganic phase has been formed in-situ as silicate particles. Due to the controlled compatibility of organic and inorganic phases different properties have been shown. Organic phase is an acrylic polyol cross linked by melamine resin. For systematic study various hybrid clear coats with different conditions have been prepared. Morphology of the films was studied by the means of AFM and common automotive tests (i.e. scratch, hardness, gloss and distinctness of image (DOI)) were also investigated for further evaluations. The results showed that incorporation of inorganic phase can significantly improve scratch resistance compared to the conventional clear coats. Use of silane precursor showed to have a significant impact on the appearance as well as on the physical and mechanical properties of the films.