수분산 polyaspartic 수지와 blocked isocyanate를 이용한 친환경 코팅제의 제조 및 물성

Abstract

Polyaspartic coating is well known as one of popular eco-friendly coatings because of non VOC and excellent mechanical properties such as fast curing, abrasion resistance, chemical resistance, light resistance and so on. Despite of a number of advantages applying polyaspartic coating to industries, there are limitations to replace conventional polyurea coatings and waterborne coatings in particularly continuous processing lines because of its very short pot-life and relatively high price. To improve short pot-life, polyaspartic resin was dispersed in water using emulsifier and blocked isocyanate as a curing agent. was used. The curing reaction between -NH of aspartics and -NCO of blocked isocyanate and properties of coatings were analysed by measuring viscosity, pencil hardness, FT-IR, weatherometer, yellowing, etc. The results showed that the pot life of waterborne polyaspartic coating agent became longer than that of conventional polyaspartic one without the change in light resistance. These results indicate that newly developed waterborne polyaspartic coating agent could replace current waterborne polyurethane coating agent without the change of the equipments.