Synthesis and characterization of poly(etherfattyamide) coatings from non edible seed oil

Abstract

Purpose

The purpose of this study is to develop poly(etherfattyamide) coatings from Pongamia glabra seeds oil utilizing a sustainable resource, which is non edible, non medicinal and goes as waste. Seed oil based poly(etherfattyamide) is used as a coating material to improve the coating properties especially gloss and alkali resistance.

Design/methodology/approach

Pongamia glabra oil was first converted into N,N′ bis 2‐hydroxyethyl Pongamia glabra oil fatty amide (HEPFA). HEPFA was treated with 1,4‐cyclohexanedimethanol (CHDM) to develop poly(etherfattyamide) (PEFA). PEFA was cured with (butylated melamine formaldehyde) (BMF) in different (35, 40, 45, 50) phr (part per hundred part of resin) to produce coating material. The structural elucidations of HEPFA and PEFA were carried out by FT‐IR, ¹H‐NMR and ¹³C‐NMR spectral techniques. The thermal study was performed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), respectively. The physico‐mechanical and chemical resistance/anticorrosive properties were investigated by standard laboratory methods.

Findings

The authors developed a good coatings material from a sustainable resource. The physico‐mechanical and anticorrosive performance evaluation exhibits satisfactory results. PEFA‐BMF coatings material showed good alkali resistance and high gloss. The thermal studies showed that PEFA‐BMF45 may be safely used up to 225°C.

Practical implications

BMF modified PEFA coatings showed the highest scratch hardness 3.5 kg, flexibility (1/8 inch conical mandrel bend test) and gloss at 45° is 76‐82. Among all, PEFA‐BMF45 showed the best physico‐mechanical and chemical resistance performance. Thus, it may be used as an efficient coating material.

Originality/value

The synthesis of BMF modified PEFA from Pongamia glabra oil using 1,4‐cyclohexanedimethanol has been studied for the first time providing a new approach to utilize a non edible seed oil – a sustainable resource.

Citation

Alam, M. and Al‐Andis, N.M. (2013), "Synthesis and characterization of poly(etherfattyamide) coatings from non edible seed oil", Pigment & Resin Technology, Vol. 42 No. 3, pp. 195-201. https://doi.org/10.1108/03699421311317361