Authors: Nandhibatla V Sastry Rakesh R Thakor
Publish Date: 2008/08/06
Volume: 6, Issue: 1, Pages: 11-25
Abstract
A synthetic strategy based on precursor and prepolymer approaches has been adopted for preparing the functional polymeric agents with urethane linkage and functional groups such as –CONH– –COOH –NH– C–N –COOR and C–Cl that can interact with the pigment surfaces The agents were tested for their dispersion capacity High pigmentloaded as high as 64 and solventfree stainers with potential applications in lowVOC paints were successfully prepared The stainers were mixed with two commercial binder resins—namely epoxy base white and polyurethane metal coat binder resins—to get first paints and their coats on various substrates such as standard glaze paper tin and mild steel panels The paintspecific properties viz percentage opacity color strength solvent resistance adhesion scratch hardness and salt spray resistance were measured to adjudge the suitability of high pigmentloaded coats in industrial applications The properties measured in general showed improvement in spite of the increase in the pigment loading The paint coats resisted not only the xylene petrol and lubricating oil attack but also humidity and salt spray up to 1000 h of exposure
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