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Properties of solvent based polyurethane adhesives containing fumed silicas
Authors:José   M. Martí  n-Martí  nez,Trinidad G. Maciá  -Agulló  ,Juan C. Ferná  ndez-Garcí  a,A. cé  sar Orgilé  s-Barceló  ,Ana Torró  -Palau
Abstract:Five hydrophilic and two hydrophobic fumed silicas of different surface area and particle size were added to solvent based polyurethane adhesives. Silica addition produced a noticeable increase in the adhesive viscosity, imparted negative thixotropy, increased the storage modulus (G') and improved the green adhesion of chlorinated rubber/PU adhesive/chlorinated rubber joints. Those modifications were more pronounced in the adhesives which contain hydrophilic silicas.
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