@Article{JRM.2013.634113,
AUTHOR = {Thomas J. Nelson, Lindsey Bultema, Neal Eidenschink, Dean C. Webster},
TITLE = {Bio-Based High Functionality Polyols and Their Use in 1K  Polyurethane Coatings},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {1},
YEAR = {2013},
NUMBER = {2},
PAGES = {141--153},
URL = {http://www.techscience.com/jrm/v1n2/49673},
ISSN = {2164-6341},
ABSTRACT = {Bio-based polyols with high functionality were successfully synthesized by ring-opening epoxidized sucrose 
esters of soybean oil with methanol under acidic conditions, and were subsequently formulated with blocked 
isocyanates to form one package polyurethanes (1KPU). The bio-based polyols were characterized by gel 
permeation chromatography (GPC), Fourier transform infrared (FTIR) spectroscopy, proton nuclear magnetic 
resonance (1
H-NMR) spectroscopy, and Brookfi eld viscosity. Bio-based coatings were prepared by formulating 
the polyols with blocked polyisocyanates based on isophorone diisocyanate (IPDI) and hexamethylene 
diisocyanate (HDI). Two types of bio-based polyols were synthesized and the ratio of NCO:OH functional 
groups was varied to explore the effect of stoichiometry. The crosslinked PU coatings were characterized 
by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), tensile testing, and 
thermogravametric analysis (TGA). The coatings applied to steel substrates were also characterized using 
ASTM methods which measured hardness, adhesion, fl exibility, and solvent resistance. As a control, a 
commercial soybean oil polyol was used and was found to have a lower modulus and a lower crosslink 
density and glass transition temperature (T<sub>g</sub>
) compared to coatings formulated with sucrose soyate polyols.},
DOI = {10.7569/JRM.2013.634113}
}