Abstract

In this study, wastes bottles of Polyethylene Glycol Terephthalate (PET) were recycled via glycolysis process using Pentaerethretol, to be reused as starting ingredients for new production polymer. It is shown that, the chemically recycled PET by esterifying the polyester with an excess of reactant such as Pentaerethretol (Per) in the attendance of zinc acetate as a developer at 190-220 OC for 8 hrs. The produced (PEGPEr) oligoester from PET waste glycolysis was introduced as a starting material in the manufacturing of High Branched Poly (hydroxy ethylene terephthalate pentaerythritol bis-phenol A) resin (HBPHETPErBPAT), its happened through the reaction of PET-GPEr oligoesters with bis phenol epoxy A at 200-220 oC for 5hrs, the composite product of which is suitable to produce a High Branched Polyurethane (HBPU) coating. A possibility of new application of HBPHETPErBPAT resin and Toluene Di-Isocyanate (TDI) as curing agent coatings are applied on the prepared surface of steel specimen. The physical, mechanical and chemical characteristics of the obtained high branched polyurethane films are there investigated. Also salt spray test and cathodic disbandment be present estimated of formed dry films on carbon steel specimens, the obtained HPPU coating films from this reason should be increasing the film strength and durability.

Keywords:PET waste; HBPHETPErBPAT composite resins; TDI; HBPU coating; Corrosion protection and cathodic disbondment