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http://dx.doi.org/10.12925/jkocs.2005.22.4.10

Curing Reaction and Physical Properties of High-Solid Acrylic/Isocyanate Coatings  

Park, Hong-Soo (Department of Chemical Engineering, Myongji University)
Shim, Il-Woo (Department of Chemical Engineering, Myongji University)
Jo, Hye-Jin (Department of Chemical Engineering, Myongji University)
Kim, Seong-Kil (R&D Center, Samhwa Paints Ind. Co. Ltd.)
Kim, Myung-Soo (Department of Chemical Engineering, Myongji University)
Publication Information
Journal of the Korean Applied Science and Technology / v.22, no.4, 2005 , pp. 371-378 More about this Journal
Abstract
In the previous study, three kinds of monomers and the functional monomer, acetoacetoxyethyl methacrylate (AAEM), which could improve the film property and cross-linkage, were polymerzied into acrylic resin copolymers (HSA-98-20, HSA-98-0, HSA-98+20) containing 80% solid content. In this study, the high-solid coatings(HSA-98-20C, HSA-98-0C, HSA-98+20C) were prepared by the curing reaction between acrylic resins containing 80% solid content and isocyanate at room temperature. Various properties were examined for the film coated with the prepared high-solid coatings. The introduction of AAEM in the coatings enhanced the abrasion resistance and solvent resistance of coatings, which indicated the possible use of high-solid coatings for top-coating materials of automobile. The curing times measured by viscoelastic measurement were 350, 264, and 212 min for HSA-98-20C, HSA-98-0C, and HSA-98+20C, respectively. This shows that the curing times become shorter with increasing $T_g$ values.
Keywords
high-solid coatings; film properties; top-coating; curing time;
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