Modification of gummy mass with Biomine resin: An industrial waste as a source of income

Abstract

Gummy mass (GM) is filtered out as industrial waste in manufacturing of Aleuritic acid in the form of effluent. It poses a problem for aleuritic acid manufacturers for its proper disposal as it is sticky material and does not dry at ambient temperature. GM was prepared from effluent of aleuritic acid collected from lac industry. Characterization of GM was carried out using Fourier Transform Infra Red (FTIR) and Differential Scanning Calorimetric (DSC) analyses. GM was modified with Biomine resin (a synthetic resin). Films of the modified products were baked at elevated temperature. FT-IR Spectroscopic and DSC analysis of air-dried and baked films of the modified products were carried out. FTIR spectra showed esterification reaction between carboxyl group of GM and hydroxyl group of the resin. DSC thermograms revealed more softening and broad peak in the air-dried film, whereas baked film of the modified product showed thermal stability at higher concentration of the resin. Coating properties and adhesive strength of air-dried and baked films of the modified products were studied. Adhesive strength, scratch hardness and impact resistance were found to be higher where GM percentage was higher. Adhesive strength of baked films was higher than air dried films while impact resistance was found better for air-dried films than baked films. Gloss increased with the increase in concentration of the resin while scratch hardness was adversely affected. Films of the modified products were found to be flexible. Baking of the films improved gloss and scratch hardness property of the modified products. Based on the study, it is concluded that the GM modified with the resin may be utilized in preparation of varnishes (metal lacquer, insulating varnish etc.) and paints. This will lead to a secondary source of income to aleuritic acid manufacturers and also others.