Effects of urea formaldehyde resin to film properties of alkyd-melamine formaldehyde resins containing organo clay

Organo clay modified alkyd resins were prepared and these modified alkyd resins were cured with different ratios of melamine formaldehyde and urea formaldehyde resins in this work. Alkyds formulated to have oil content 40% were prepared with phthalic anhydride (PA), glycerine (G), coconut oil fatty acid (COFA), dipropylene glycol (DPG) and organ clay. "K alkyd constant system" was used for the formulation calculations of the alkyd resins. Alkyd resins were blended with 40% of a commercial melamine formaldehyde. The films of the alkyd-amino resins were prepared from 60% solid content xylene solutions using 50 mu m applicators. After the films were cured at 140 degrees C for 2 h in an oven, properties of the films were determined. The film properties of the alkyd-amino resins such as drying degree, hardness, adhesion strength, abrasion resistance, water, acid, alkaline, solvent resistance, and resistance to environmental conditions were investigated. The addition of the urea formaldehyde resin and organo clay has positive effect on the physical and chemical resistance of the alkyd-amino resins. (C) 2010 Elsevier B.V. All rights reserved.