Thirty2 Degrees

In addition, the use of styrofoam waste has important ecological value, since we are talking about reducing the waste in the human ecosphere. Most technological foundry sand compositions of mixtures on a 40-percent solution containing 2% polystyrene in the bottom line. These blends perfectly molded and cured by drying at a short-term temperatures up to 200 degrees. S. Institute received a patent for the invention of Ukraine on the composition of these mixtures, together with the now patented composition of the mixture, cured at room temperature. In the development of the technology of recycling waste polystyrene by obtaining its solutions in gum turpentine, and then use as a binder in foundry offered flowsheet development of an industrial process with a list of simple equipment, which includes the reactor as a hermetically sealed vessel equipped with a stirrer to accelerate the dissolution of polystyrene and obtaining homogeneous concentration. As shown by experiments in solutions of polystyrene in gum turpentine, regardless of the concentration of the solution, there is a small sedimentation pollution listed waste polystyrene.

After preparing a solution of a given concentration operation carried out advocacy for the deposition of these pollutants and their subsequent removal. In the industrial recycling may serve as a convenient way to clean polystyrene solution. Physical and mechanical properties of the molding core mixtures based on polystyrene binder surpass or equal the same characteristics cold-hardening mixtures based on sodium silicate, phenol-formaldehyde, urea-furan resins. This fact allowed to recommend polyester tie with gum turpentine to replace the above binders and, in particular, expensive resins (the cost is much higher solution of polystyrene), in the production process from casting of ferrous and nonferrous alloys. In Physico-Technological Institute of Metals and Alloys in addition to creating new bonding sand mixtures are searching for partners to participate in programs of development of technology for production of dissolved polystyrene rigid plastics and products, as well as its use as raw materials for production of inexpensive high-strength adhesives, insulating foam and construction. Bactericidal properties of the softwood gum turpentine with adhesive properties of the solution described can be used for the production of plaster, sealant, as well as at factories producing food and medicine.