RT Journal Article
T1 Bringing non-isocyanate polyurethanes closer to industrial implementation using carbonated soybean oil-based amino hardeners
A1 Centeno-Pedrazo, Ander
A1 Freixa, Zoraida
A1 Feola, Roland
A1 Lunzer, Florian
A1 Garcia-Suarez, Eduardo J.
A1 Ortiz, Pablo
AB The polyaddition between cyclic carbonates and diamines to form non-isocyanate polyurethanes (NIPUs) is a safer alternative than traditional PU synthesis. However, the lower reactivity of cyclic carbonates requires of long reaction times and/or high temperatures for their curing, hampering their industrial implementation in the coating industry. Starting from carbonated soybean oil (CSBO) and amine excess, and through a stepwise addition process, cyclic carbonate full conversion has been achieved, yielding amino-terminal NIPUs with up to 62 % of biobased content. These amino-terminal NIPUs act as regular amino hardeners, and have been used to cure epoxy resins under the time and temperature required by the coating industry. The performance of these partially bio-based, NIPU-epoxy hybrid coatings was evaluated by pot-life, drying, hardness and solvent resistance, achieving comparable results to the industrial formulations. The simple synthesis process, the suitable curing conditions and the properties of the coatings, bring NIPU chemistry closer to industrial implementation.
SN 0300-9440
YR 2023
FD 2023-12
LK https://hdl.handle.net/11556/3963
UL https://hdl.handle.net/11556/3963
LA eng
NO Centeno-Pedrazo , A , Freixa , Z , Feola , R , Lunzer , F , Garcia-Suarez , E J & Ortiz , P 2023 , ' Bringing non-isocyanate polyurethanes closer to industrial implementation using carbonated soybean oil-based amino hardeners ' , Progress in Organic Coatings , vol. 185 , 107925 . https://doi.org/10.1016/j.porgcoat.2023.107925
NO Publisher Copyright: © 2023 The Authors
DS TECNALIA Publications
RD 29 jul 2024