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One-Pack Cross-linkable Waterborne Methyl Ethyl Ketoxime-Blocked Polyurethane/Clay Nanocomposite Dispersions  

Subramani Sankaraiah (Department of Chemical Engineering, Yonsei University)
Lee Jung Min (Department of Chemical Engineering, Yonsei University)
Kim Jung Uyun (Department of Chemical Engineering, Yonsei University)
Cheong In Woo (Department of Applied Chemistry, Kyungpook National University)
Publication Information
Macromolecular Research / v.13, no.5, 2005 , pp. 418-426 More about this Journal
Abstract
One-pack cross-linkable nanocomposites of waterborne methyl ethyl ketoxime (MEKO)-blocked aromatic polyurethane dispersion (BPUD) reinforced with organoclay (quaternary ammonium salt of Cloisite 25A) were synthesized by the acetone process using 4,4'-methylenedi-p-phenyl diisocyanate (MDl), poly(tetramethylene) glycol (PTMG), dimethylol propionic acid (DMPA), and methyl ethyl ketoxime (MEKO). Particle size, viscosity, and storage stability of these nanocomposites were investigated. TEM and XRD studies confirmed that the silicate layers of organophilic clay were exfoliated and intercalated at a nanometer-scale in the BPUD matrix.
Keywords
polyaddition; waterborne; polyurethane; dispersions; nanocomposite; morphology; blocked polyurethane.;
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