Open AccessBio-based polyurethane coating synthesized from modified castor oil - applicable in base coat of automobile paint
Author(s) -
Debasmita Mohanty,
MK Kanny,
Smruti Ranjan Mohanty,
S. K. Nayak
Publication year - 2022
Publication title -
suid-afrikaanse tydskrif vir natuurwetenskap en tegnologie/die suid-afrikaanse tydskrif vir natuurwetenskap en tegnologie
Language(s) - English
Resource type - Journals
eISSN - 2222-4173
pISSN - 0254-3486
DOI - 10.36303/satnt.2021cosaami.24
Subject(s) - castor oil , polyurethane , isophorone diisocyanate , gloss (optics) , materials science , isocyanate , curing (chemistry) , polyol , oxidizing agent , diethanolamine , coating , fourier transform infrared spectroscopy , polymer chemistry , chemical engineering , composite material , chemistry , organic chemistry , engineering
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.