Polyurethane Dispersions Based on Interesterification Product of Fish and Linseed Oil |
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Authors: | Ramakant V Nimbalkar Vilas D Athawale |
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Affiliation: | (1) Department of Chemistry, University of Mumbai, Kalina Santacruz, Mumbai, 400098, India |
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Abstract: | Alkyd and styrenated alkyd resins based on fish oil and their interesterifications with linseed oil were synthesized. The
various properties of fish oil, such as its iodine value, acid value, saponification value and moisture content were determined.
The interesterification product of fish oil and linseed oil can be used to partially replace the commercially available linseed
oil alkyd resin. Alkyd resin and styrenated alkyd resin were modified with 2,2 dimethylolpropionic acid to introduce acid
functionality and then sequentially reacted with isophorone diisocyanate, neutralized with amine, chain extended with ethylenediamine
and dispersed in water to form a polyurethane dispersion. The newly synthesized resins and polyurethane dispersions were studied
for coating properties such as scratch hardness, adhesion, flexibility, impact, solvent and chemical resistance. The polyurethane
dispersions exhibited superior coating properties to those of their respective alkyds and styrenated alkyds. |
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