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Effects of Blending Fatty Acid-Glycerol-pMDI with Urea-Formaldehyde Resin Adhesives to Their Adhesion for the Use of Soybean Oil  

You, Young-Sam (Department of Forest Science, Konkuk University)
Choi, Jin-Lim (Department of Forest Science, Konkuk University)
Seo, Jun-Won (Department of Forest Science, Konkuk University)
Park, Heon (Department of Forest Science, Konkuk University)
Publication Information
Journal of the Korean Wood Science and Technology / v.34, no.4, 2006 , pp. 31-36 More about this Journal
Abstract
This study was conducted to improve the bond strength of plywood bonded with F/U molar ratio urea-formaldehyde (UF) resins modified with the selected FGMDI prepolymer contents for various purposes. The amount of FGMDI was mixed with liquid UF resin at 0 wt% (as control), 2 wt%, 5 wt%, 10 wt%, 25 wt%, and 50 wt% based on the resin solids. As results, in bonding strength, plywood with F/U molar ratio of 1.4 showed the highest value in Type 2 test and all molar ratio UF resins modified with over 25 wt% of the FGMDI showed more than $11kgf/cm^2$, which was satisfied the minimum requirement of KS standard, $7.5kgf/cm^2$, after Type1.5 testing. As F/U molar ratio was increased and the FGMDI addition in the UF resin was increased, average reduction rate of Type 1.5 bonding strength compared with Type 2 was significantly decreased.
Keywords
Isocyanate prepolymer; urea-formaldehyde resin; bonding strength; Type 1.5; Type 2;
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Times Cited By KSCI : 1  (Citation Analysis)
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