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http://dx.doi.org/10.12925/jkocs.2003.20.3.7

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

You, Hyuk-Jae (Department of Chemical Engineering, Myongji University)
Chung, Dong-Jin (Department of Chemical Engineering, Myongji University)
Hahm, Hyun-Sik (Department of Chemical Engineering, Myongji University)
Park, Hong-Soo (Department of Chemical Engineering, Myongji University)
Kim, Seong-Kil (Sam-Hwa Paints Ind. Co. Ltd)
Publication Information
Journal of the Korean Applied Science and Technology / v.20, no.3, 2003 , pp. 237-242 More about this Journal
Abstract
The high-solid coatings were prepared by blending the synthesized acrylic resin in the previous paper and hexamethylene diisocyanate-trimer and curing it at room temperature. The characterization of the films of the prepared coatings was performed. The impact resistance, $60^{\circ}C$ specular gloss, cross-hatch adhension, 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. From a viscoelastic measurement using a rigid-body pendulum, curing was accelerated with the $T_g$ value. With the increase in $T_g$, log damp value was lowered and dynamic viscoelasic $T_g$ of a cured film was increased.
Keywords
acrylic resin; HDI-trimer; curing; high-solid coatings;
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