Caprolactone기 함유 아크릴수지와 HDI-Trimer에 의한 하이솔리드 도료의 도막물성

Physical Properties of High-Solid Coatings with Acrylic Resins Containing Caprolactone Group and HDI-Trimer

High-solid coatings were prepared by blending of previosly synthesized acrylic resins and hexamethylene diisocyanate-trimer and curing it at room temperature. The characterization of the films of the prepared coatings was performed. The impact resistance, cross-hatch adhesion, 60^{circ}specular gloss, and heat resistance of the films proved to be good, and the pencil hardness and drying time proved to be slightly poor. Especially, there was a remarkable improvement in the heat resistance. This improvement may stem from the regular arrangement of ethyl groups introduced into the acrylic resin. As a result of Rigid-body pendulum visco-elasticity measurement, dynamic Tg values of cured films increased with dynamic Tg values.