Analysis of Commercial Unsaturated Polyester Repair Resins

Report No. ARL-TR-4872
Authors: Kevin Andrews; Scott Bingham; Ian McAninch; Casey Greer; James M. Sands; John J. La Scala; Xing Geng; Giuseppe R. Palmese; Vincent Crisostomo; Steven Suib
Date/Pages: July 2009; 50 pages
Abstract: The basic rheological, thermal, and mechanical properties of commercially available repair putties have been determined in this study, as has the composition of these products. These products contain 33% to 40% unsaturated polyester resin, 10% to 20% styrene, and 45% to 57% inorganic fillers. The fillers are made up of hollow glass microspheres, talc, magnesium carbonate, calcium carbonate, fumed silica, glass fibers, and various other minerals. These products have a glass transition temperature of roughly 25 ¿C and a room temperature storage modulus of 2 to 4.6 GPa. These putties display shear thinning behavior as a result of the fillers. All of these properties provide important benchmark characteristics that must be more or less met by U.S. Army Research Laboratory/Drexel-invented environmentally friendly, hazardous air pollutant-free repair resins utilizing renewable fatty acid-based monomers.
Distribution: Approved for public release
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Last Update / Reviewed: July 1, 2009