In this study, we synthesized a water-based, rosin-modified, polymerized oil (WRPO) an addition and polymerization reaction of dehydrated castor oil (DCO), rosin acid (RA), zinc resinate (ZR) and dehydrated castor oil acid (DCOA). Addition and polymerization reactions at 240 °C, followed by neutralization with ammonia, dissolution into butyl alcohol and subsequent dilution with water, were performed at varying DCOA contents of 10%, 20%, 30%, 35% and 40%. WRPO was mixed with butoxymethylmelamine (BMM), a curing agent, at a weight ratio of 80 : 20, and then cured for 2 hours at 130 °C. Structure and thermal characterizations of the prepared WRPOs were investigated FTIR spectroscopy, H NMR spectroscopy and TGA. Characterization results indicated that when the contents of DCOA and ZR were 35% and 5%, respectively, the obtained WRPO exhibited fine water-dispersible stability and excellent physicochemical properties.
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http://dx.doi.org/10.1039/d4ra03350g | DOI Listing |
RSC Adv
January 2025
High-Tech Research and Development Center, Kim Il Sung University Pyongyang Democratic People's Republic of Korea
In this study, we synthesized a water-based, rosin-modified, polymerized oil (WRPO) an addition and polymerization reaction of dehydrated castor oil (DCO), rosin acid (RA), zinc resinate (ZR) and dehydrated castor oil acid (DCOA). Addition and polymerization reactions at 240 °C, followed by neutralization with ammonia, dissolution into butyl alcohol and subsequent dilution with water, were performed at varying DCOA contents of 10%, 20%, 30%, 35% and 40%. WRPO was mixed with butoxymethylmelamine (BMM), a curing agent, at a weight ratio of 80 : 20, and then cured for 2 hours at 130 °C.
View Article and Find Full Text PDFGels
October 2024
Pro2TecS, Research Center in Chemical Processes and Product Technology, Escuela Técnica Superior de Ingeniería, Universidad de Huelva, Campus "El Carmen", 21007 Huelva, Spain.
Polymers (Basel)
May 2023
Materials Engineering Department, Federal University of Paraíba, João Pessoa 58051-900, Brazil.
Epoxidation of castor oil in synthetic and enzymatic routes was carried out in order to promote a system with less environmental impact. The epoxidation reactions of castor oil compounds upon addition of lipase enzyme with and without acrylic immobilization and with reaction times of 24 and 6 h, as well as the synthetic compounds upon addition of Amberlite resin and formic acid, were investigated using Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance in hydrogen molecules (H-NMR). The analysis indicated that the enzymatic reactions (6 h) and synthetic reactions provided a conversion from 50 to 96% and epoxidation from 25 to 48%, resulting from peak stretching and signal disintegration in the hydroxyl region due to the appearance of HO in the interaction of peracid with catalyst.
View Article and Find Full Text PDFJ Chromatogr Sci
February 2019
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai, China.
Castor oil is a traditional Chinese medicine containing a chemically complex mixture of triacylglycerols (TAGs). Herein, the TAGs in castor oil were analyzed in detail. First, the fatty acid composition of castor oil was examined via methylated derivatisation followed by gas chromatography-mass spectrometry (GC-MS).
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