환경친화성 하이솔리드 도료의 제조 및 고형분 함량에 따른 도막물성 변화

Preparation of Environmental Friendly High-Solid Coatings and Their Property Changes with Solid Contents

Room temperature cure type of acryl-urethane coatings with high solid content were prepared in this study. Acrylic resins with 80% solid content were cured with hexamethylene diisocyanate (Desmodure N-3600). The cure time of prepared coatings BEHCC-84 (BEHC-84 : T_g=0^{circ}C) and BEHCC-87 (BEHC-87 : T_g=30^{circ}C), measured by rigid-body pendulum method, was recorded 8.3 hours and 3.8 hours, respectively. Dynamic viscoelastic experiment also revealed the glass transition temperature of BEHCC-84 and BEHCC-87 to be T_g=40.3^{circ}C and T_g=43.3^{circ}C, respectively. It was found that the adhesion and flexural properties among various propeties of coatings were enhanced by the incorporation of caprolactone acrylate monomer into the acrylic resins.