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http://dx.doi.org/10.12925/jkocs.2008.25.3.7

Application of Acrylic Resins Containing Acetoacetoxy Group and 90% Solid Contents to High-Solid Coatings  

Park, Hong-Soo (Department of Chemical Engineering, Myongji University)
Kim, Bo-Bae (Department of Chemical Engineering, Myongji University)
Kim, Ji-Hyun (Department of Chemical Engineering, Myongji University)
Park, Eun-Su (Department of Chemical Engineering, Myongji University)
Yoon, Hyun-Don (Department of Chemical Engineering, Myongji University)
Lee, Young-Jun (Department of Chemical Engineering, Myongji University)
Yeon, Je-Won (Department of Chemical Engineering, Myongji University)
Ka, Eun-Ji (Department of Chemical Engineering, Myongji University)
Lee, Ji-Soo (Department of Chemical Engineering, Myongji University)
Publication Information
Journal of the Korean Applied Science and Technology / v.25, no.3, 2008 , pp. 322-331 More about this Journal
Abstract
In order to synthesize high-solid coatings, acrylic resins (HSAs) containing 90% solid content were first synthesized, then the synthesized HSAs were cured with a curing agent, isocyanate, at room temperature to obtain high-solid coatings. In the HSAs synthesis, conversion was in a range of $82{\sim}87%$, and viscosities and number-averaged molecular weight ($M_n$) of the HSAs were in a range of $4380{\sim}8010$ cP and $1540{\sim}1660$, respectively. From the correlation between $T_g$ value, viscosity and $M_n$, it was found that, with increasing $T_g$ value, viscosity increases rapidly and molecular weight increases slowly. From the visco-elasity measured by the pendulum method, it was found that the curing time decreased with increasing $T_g$ values. From the tests of physical properties of the coatings' film, $60^{\circ}$ specular gloss, impact resistance and heat resistance were proved to be good and pencil hardness, drying time and pot-life were proved to be poor.
Keywords
high-solid coatings; acrylic resin; acetoacetoxy group; physical property; rigid-body pendulum method;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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