Thermoset Alkyd-Acrylic Hybrid Emulsions for Coatings

Abstract

Alkyd acrylic hybrid emulsions can offer cost/performance advantages over common 1K coatings such as polyurethane dispersions (PUDs), acrylic emulsions and blends. Hybrid emulsions with different ratios of alkyd resin to acrylic monomers were synthesized. Emulsion with resin-to monomer ratio of 1:1 (wt/wt) with total solids as high as 50% had a shelf stability of more than 8 months. Morphology of hybrid emulsions was studied by scanning electron microscopy. Hybrid emulsions were characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis. Films obtained from the hybrid emulsions were found to be homogeneous and exhibited excellent thermal and coating properties.

Keywords:

• Alkyd acrylic hybrids
• hybrid emulsion
• waterborne coatings

Notes

^a GC analysis of sardine fish oil.

^b Ref.^{[ 11 ]}

FLA = interesterification product of linseed and fish oil alkyd 50:50; H1 = hybrid alkyd acrylate emulsion 75:25; H2 = hybrid alkyd acrylate emulsion 50:50; H3 = hybrid alkyd acrylate emulsion 25:75.

H1 = hybrid alkyd acrylate emulsion 75:25; H2 = hybrid alkyd acrylate emulsion 50:50; H3 = hybrid alkyd acrylate emulsion 25:75.

FLA = interesterification product of linseed and fish oil alkyd 50:50; H1 = hybrid alkyd acrylate emulsion 75:25; H2 = hybrid alkyd acrylate emulsion 50:50; H3 = hybrid alkyd acrylate emulsion 25:75.

FLA = interesterification product of linseed and fish oil alkyd (50:50); H1 = hybrid alkyd acrylate emulsion 75:25; H2 = hybrid alkyd acrylate emulsion 50:50; H3 = hybrid alkyd acrylate emulsion 25:75; IDT = initial decomposition temperature; T_10% = temperature at which 10% weight loss occurred; T_30%; = yemperature at which 30% weight loss occurred.