Linseed and sunflower oil alkyd ceramers

New inorganic/organic hybrid coatings were prepared, using linseed and sunflower oil based alkyds with sol-gel precursors. Three sol-gel precursors, titanium (IV) i-propoxide (TIP), titanium di-i-propoxide, diacetylacetonate (TIA), and zirconium (IV) n-propoxide (ZRP), were used in this study. The goal of this study was to investigate the affects of the type of alkyd on the overall properties of the alkyd ceramer coating. Various coatings properties such as hardness, impact resistance, adhesion, tensile properties and flexibility were evaluated as a function of alkyd type and sol-gel precursor content. Thermal and mechanical properties were also investigated as a function of sol-gel precursor and alkyd type. Alkyd ceramers high in linolenic acid content produced harder, tougher films while maintaining the same degree of flexibility as the high linoleic acid alkyds. At low sol-g-nel precursor content, the tensile properties of both the sunflower and linseed oil based alkyd ceramers initially decreased. As the sol-gel content was increased, the tensile properties increased as a function of sol-gel content. (C) 1998 Elsevier Science S.A. All rights reserved.