Preparation and Characterization of Hydrogenated Castor Oil ‐based Coating Wax

Abstract
A synthesis method was developed from a reaction between hydrogenated castor oil (HCO) and ethylenediamine to prepare a product to coat paperboard. For highest conversion rate , a molar ratio of 1:3 of HCO and ethylenediamine reacted at 130 °C for 2.5 h. Fourier transform infrared (FTIR) spectroscopy and Nuclear magnetic resonance (NMR) confirmed the obtained product was a wax combining HCO with two amide groups. The melting point of the diamide wax was 130 °C. The hardness of the wax was harder than that of other waxes (over eight times to beeswax and over four times to paraffin wax) except carnauba wax. In addition, the cohesiveness of the HCO diamide wax was slightly poorer than that of others. In coating paperboard application, the performance of diamide wax in compression force of all treatments was similar to that of carnauba wax and better than that of other waxes although soaking allows paperboard coated with the wax to have wax loss and compression force loss. The results shows that the HCO wax with diamide group can be a good coating material on paperboard.Practical applications: The synthesis method was used to prepare a good coating material. The HCO material was confirmed to be diamide wax after structure confirmation by FTIR and NMR. This diamide wax showed good physical properties and played well in coating paperboard for its high adhesive rate and good compression force with or without soaking or heating. It also showed a good adhesive ability while...

Source: European Journal of Lipid Science and Technology - January 1, 2018 Category: Lipidology Authors: Zongyao Huyan, Shaoxuan Ding, Xiuzhu Yu, Xiaoli Liu Tags: Research Article Source Type: research