Abstract
The industry of powder coatings, for base polyester/epoxy, produces about 300 kg.day−1 of residue in a production of 6,000 kg.day−1 (5% residue). Powder coatings with equal or lower to 10 μm of granulometer are considerate residues. The use of these residues in the formulation of adhesives is studied in the present work. Portions of residue with 0.1 a 0.5 g.mL−1 were tested with 7 solvents and 5 kinds of elastomers. Two solvents compatible with the residue and three elastomers, so, three mixtures were obtained: A, B and C; then, 15 g of a petroleum derivated was additioned. The mass of mixtures was homogenized in a mechanic stirrer for 15 minutes. The preliminary tests have demonstrated that the adhesives A, B and C had effective adherence in carpet on cement slab and HDF® (High Density Fiber). The formulations of A, B and C show superior to other 8 tested specially in: fast drying, migration of adhesive upon the surface (carpet) and adherence to the slab. According to the rules ASTM D2094 and D2095 the results of tension test are compared to commercial adhesives, resulting that adhesive C had an efficiency similar to a commercial adhesive for the same utilization.
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