Viscosity

Viscosity index

Organic chemistry

Trimethylolpropane

Polyurethane

Coating

Engineering

Composite material

Alkyd

Raw material

Chemistry

Materials science

Scanning electron microscope

Base oil

Chemical engineering

Acid value

Journal of Polymer Research

The high-unsaturated fatty acid content of Sacha inchi oil (SIO), a perennial plant originally from Peru, has turned it into a potential raw material for the production of alkyd resins. In this study, different proportions of multifunctional polyols were used to prepare air-drying resins. Physicochemical characteristics (acid value, viscosity, colour, density, drying time, and hardness) of alkyds were evaluated. Moreover, FT-IR, TG–DTA, 1H-NMR and 13C-NMR characterization techniques were used. SIO-based alkyd resins prepared with trimethylolpropane exhibited low viscosities, suitable for preparing more manageable high solids protective coatings.

Low viscosity alkyd resins based on trimethylolpropane and Peruvian oil