Bio-based polyurethane coating synthesized from modified castor oil - applicable in base coat of automobile paint

D Mohanty; M K Kanny; S Mohanty; S K Nayak

D Mohanty Durban University of Technology
M K Kanny Durban University of Technology
S Mohanty Central Institute of Petrochemicals Engineering and Technology
S K Nayak Central Institute of Petrochemicals Engineering and Technology

Keywords: Epoxidation, Castor oil, Polyurethane, Base coat, Automobile paint, Epoxidised castor oil

Abstract

The current study reports the epoxidation of castor oil (CO) by using hydrogen peroxide as catalyst and formic acid as oxidizing agent. Subsequently bio based polyurethane based base coat was synthesized by using epoxidised castor oil (ECO) as polyol, Isophorone diisocyanate (IPDI) as curing agent and dibutylin dilaurate (DBTDL) as catalyst. The paint formulation with OH:NCO ratio 1:1.2 was optimized. An independent study was carried out employing the mechanical test like cross-cut tape test was carried out to evaluate th paint properties. Morphological and structural studies like FTIR, SEM, HNMR were carried out with the paint formulation. Thermal property studies like TGA, DSC were carried out with the paint. Gloss, weather resistance of the paint was evaluated.

Author Biographies

D Mohanty, Durban University of Technology

Composite Research Group, Department of Mechanical Engineering, Steve Biko Campus, Durban University of Technology, Durban, KwaZulu-Natal, South Africa, 4001

M K Kanny, Durban University of Technology

Composite Research Group, Department of Mechanical Engineering, Steve Biko Campus, Durban University of Technology, Durban, KwaZulu-Natal, South Africa, 4001

S Mohanty, Central Institute of Petrochemicals Engineering and Technology

School of Advanced Research in Polymers (SARP): LARPM, Central Institute of Petrochemicals Engineering and Technology, Bhubaneswar, Odisha, India, 751024

S K Nayak, Central Institute of Petrochemicals Engineering and Technology

School of Advanced Research in Polymers (SARP): LARPM, Central Institute of Petrochemicals Engineering and Technology, Bhubaneswar, Odisha, India, 751024