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POLY(ALKYLENE CO-ADIPATE TEREPHTHALATE) PREPARED FROM RECYCLED POLYETHYLENE TEREPHTHALATE HAVING LOW IMPURITY LEVELS
POLY(ALKYLENE CO-ADIPATE TEREPHTHALATE) PREPARED FROM RECYCLED POLYETHYLENE TEREPHTHALATE HAVING LOW IMPURITY LEVELS
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机译:由低杂质水平的回收聚乙烯对苯二甲酸乙二酯制备的聚乙烯(烷基共己二酸对苯二甲酸乙二酯)
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摘要
This disclosure relates to an aliphatic-aromatic copolyester of poly(butylene-co-adipate terephthalate) that is prepared from recycled polyethylene terephthalate in the presence of titanium catalyst and a phosphorous containing compound. The copolyester is contaminated with little or no ethylene glycol and/or isophthalic acid, which are artifacts of preparing the copolyester from recycled PET. Advantageously, because there is little or no contamination from ethylene glycol and/or isophthalic acid in the copolyester, there is essentially no depression in the material's melting temperature.
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