Curing agents are critical components of aqueous epoxy resin systems. Unfortunately, its uses and applications are restricted because of its low emulsifying yields. Epoxy resins are frequently used in electrical devices, castings, packaging, adhesive, corrosion resistance, and dip coating. In the presence of curing agents, epoxy resins become rigid and infusible. Eco-friendliness and mechanical functionality have emerged as vulcanization properties. Curing agents are used for surface modification, thermodynamic properties, functional approaches to therapeutic procedures, and recent advances in a variety of fields such as commercial and industrial levels. The curing agent has superior construction and mechanical properties when compared to the commercial one, which suggests that it has the potential for use as the architectural and industrial coatings. The thermal stability of cured products is good due to the presence of the imide group and the hydrogenated phenanthrene ring structure. Over the course of the projection period, it is anticipated that the global market for curing agents will continue to expand at a steady rate. The growth of the market is mainly driven by its expanding range in future applications such as adhesives, composites, construction, electrical, electronics, and wind energy. This review focused on the most recent advancements in curing techniques, emphasizing their thermal and mechanical properties. The review also presents a critical discussion of key aspects and bottleneck or research gap of the application of curing agents in the industrial areas.

본 연구는 염지제의 종류에 따른 발효소시지의 숙성 중 미생물 및 위생적 품질 변화에 미치는 영향에 대해 살펴보았다. 천일염+NaNo2, 정제소금+NaNo2, KCl+NaNo2, MgCl2+NaNo2 총 4가지 형태의 염 지제 종류에 따라 제조된 발효소시지를 숙성 중 수분활성도, VBN, TBA 및 미생물 분석을 실시하였다. 수분활성도의 경우 숙성28일과 35일에서 KCl+NaNo2 처리구가 다른 처리구보다 가장 낮은 값을 나타 내었다(p<0.05). VBN 의 경우 숙성기간 중 KCl+NaNo2 처리구가 다른 처리구보다 가장 낮은 값을 나 타내었다(p<0.05). TBA 값은 숙성기간 중 KCl+NaNo2 처리구가 가장 낮은 값을 나타내었고, 천일염 +NaNo2처리구가 가장 높은 값을 나타내었다(p<0.05). 미생물 분석 결과, 유산균수의 경우 처리구와 상관없이 숙성 14일까지 증가하다, 숙성 35일까지 약간 감소하는 경향을 나타내었다(p<0.05). 본 연구 결과를 통해 염지제로서 염화나트륨을 대체할 수 있는 KCl의 사용이 위생적 품질에 악영향 없이 염화 나트륨 함량을 감소시킬 수 있는 가장 좋은 방법이고 저염 육제품 개발을 위한 기초자료로 활용될 수 있을 것이라 사료된다.

PU type flame-retardant coatings (TBAO/L-75, TBAOL ; TBAO/N-100, TBAON) were prepared by blending bromine-containing modified polyester (TBAO) which was synthesized in our earlier work. with two kinds of isocyanate curing agents, Desmodur L-75 and Desmodur N-100. Physical properties of the prepared flame-retardant coatings were tested. TBAOL shows better hardness than TBAON, while TBAON shows better viscosity, accelerated weathering resistance, yellowness index and lightness index difference than TBAOL. There were no remarkable differences in fineness of grind, 60˚ specular gloss, cross-hatch adhesion, and abrasion resistance of TBAOL and TBAON. There was no discernable difference in flame-retardancy between the two flame-retardant coatings, TBAOL and TBAON. When the content of tribromo acetic acid, which is flame-retarding component, was 30wt% the LOI value was in a range of 29~30%, which indicates that the two coatings are good flame-retardant coatings.