Production process and its constituent and goods of polycyclohexane dimethylene terephthalate copolymer from polyethylene terephthalate

摘要

As for a certain process, 1st temperature under inactive atmosphere and at least by the 1st pressure of 101kPa, the polyethylene terephthalate component which is chosen from the group which is formed from the cyclohexane dimethanol and the polyethylene terephthalate and polyethylene terephthalate copolymer and, heating, the step which forms the melting blend; While the 2nd temperature whose aforementioned 1st is higher than temperature and the period when it is under 2nd decompressing, under the condition in addition for being effective to the formation of below-mentioned copolymer, agitating the aforementioned melting blend, heating, the step which forms the denaturation polycyclohexane dimethylene terephthalate copolymer which includes 1 residues which were induced from the aforementioned polyethylene terephthalate component at least and, it includes.