Manufacturing and Characteristics of Hardness Controllable Epoxy for Restoration of Earthenware

Abstract

Fatty acids, tall-oil, reaction products with tetraethylenepentamine and 1-(2-aminoethyl) piperazine-based epoxy resin were mixed to manufacture 2 types of hardener to enable hardness control for restoration of earthenware. The mixed epoxy resin was manufactured in 2-solution reaction hardening type to control the hardness in the range of approximately 40∼65 Hs, and tensile strength in the range of 27∼121 kgf/mm<sup>2</sup> and hardening type of 20∼30 min were secured. Moreover, it has wear rate that has been enhanced by 2 folds compared to the existing restoration material, which can be controlled in accordance with the mixing ratio, and was manufactured to enable mixing of diversified fillers later on. These results indicate that this is a restoration material that can solve the problems pointed out for the earthenware restoration materials such as processability and workability that occurred due to high level of hardness, tensile force and adhesion strength, etc., and increase in the level of fatigue due to tension with earthenware surface, etc. Accordingly, it is deemed that it is a material that can be used in actual restoration.