A PROCESS FOR RECYCLING CONSUMED POLYETHYLENE TEREPHTHALATE (PET) AND PREPARING AN UNSATURATED POLYESTERIMIDE COMPOSITE THEREOF

摘要

A process for recycling consumed polyethylene terephthalate (PET). Used PET is water washed, dried, depolymerised using tris-2-hydroxyethyl isocyanurate (THEIC) and then repolymerised using propylene glycol, ethylene glycol, maleic anhydride or fumaric acid or combinations thereof to obtain unsaturated polyester resins. If desired, the unsaturated polyester resins are further blended with a filler, reactive diluent and compatibilizing agent and optionally, additives, to form a viscous mass which is cured in the presence of methyl ethyl ketone peroxide(MEKP) at room temperature to obtain an unsaturated polyesterimide composite for electrical encapsulation or insulation.