678 Kimyo va kimyoviy texnologiyalar
ADHESION OF A THERMOREACTIVE EPOXY WATERFUL EMULSION FILM FORMER ON METAL
Keywords:
Anti-corrosion coating, water-based emulsions, epoxy resin, thermoset polymers, adhesive strengthAbstract
Objective. The purpose of this study is to study the adhesive properties of samples of an aqueous emulsion of an epoxy thermosetting polymer, as well as to conduct comparative analyzes of the results of tests performed on water-emulsion epoxy thermosetting film-forming materials to determine adhesive strength. The influence of the concentration of the dry residue of the emulsion system on its adhesive strength is shown.
Methods. To achieve the goal of this study, a method was used to determine the adhesive strength of samples of an aqueous emulsion of an epoxy thermosetting polymer on a computerized electromechanical universal testing machine. As an emulsifier in a water-emulsion system based on an epoxy polymer, carboxymethyl cellulose was used in amounts based on the weight of the epoxy resin. To accelerate the hardening of the water-based epoxy film former, the curing accelerator UP-606 was used in the amount of 1.2% by weight of the epoxy resin.
Results. The results of experiments on a computerized electromechanical universal testing machine to determine the adhesive properties of samples of an aqueous emulsion of an epoxy thermosetting film former showed that the highest adhesive strength of the hardened coating of an aqueous epoxy polymer emulsion on metal reaches up to 7.83 MPa at a dry residue concentration of the emulsion system of 60 percent.
Conclusion. The results obtained by the method for determining the adhesive strength of samples of an aqueous emulsion of an epoxy thermosetting film former on a computerized electromechanical universal testing machine indicate that this water-emulsion composition based on epoxy resin can be used as a film former, or as a paint and varnish matrix for metals.
