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Preparation and Characterization of Novel Organic Montmorillonite-Reinforced Blocked Polyurethane Nanocomposites

This paper presents a proprietary process developed to manufacture organic montmorillonite (OMMT)- reinforced and isocyanate (-NCO) -blocked pouring-type polyurethane (BPPU) nanocomposites. The BPPU polymer was prepared from phenol- blocked blends of toluene diisocyanate (TDI), polyethylene glycol and 3,3'-dichloro-4,4'-diamido diphenyl methane (MOCA). The physical and mechanical properties of OMMT reinforced BPPU composites have been studied. BPPU samples containing 4 phr OMMT exhibited excellent mechanical properties because of the exfoliation and intercalation of the organic silicate layers.