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28 条记录 (耗时 0.04 秒)

    Method of post-polymerization stabilization of high activity catalysts in continuous polyethylene terephthalate production
    26.
    发明授权
    Method of post-polymerization stabilization of high activity catalysts in continuous polyethylene terephthalate production 失效
    高活性催化剂在连续聚对苯二甲酸乙二醇酯生产中的后聚合稳定化方法

    公开(公告)号：US5898058A

    公开(公告)日：1999-04-27

    申请号：US650291

    申请日：1996-05-20

    申请人： Carl S. Nichols ,  Tony Clifford Moore ,  Walter Lee Edwards

    发明人： Carl S. Nichols ,  Tony Clifford Moore ,  Walter Lee Edwards

    IPC分类号： C08G63/78 ,  C08G63/82 ,  C08G63/88 ,  C08K5/49 ,  C08K5/524 ,  C08L67/02

    CPC分类号： C08K5/49 ,  C08G63/78 ,  C08G63/82 ,  C08G63/88 ,  C08K5/524

    摘要： A continuous process for producing polyethylene terephthalate polyester from terephthalic acid and ethylene glycol uses a stabilizer, preferably containing phosphorous, to produce a high quality polyethylene terephthalate polyester which is relatively free of the acetaldehyde and discoloration which are associated with the post-polymerization activity of a polymerization catalyst. The stabilizer is preferably added at or after the end of the polymerization reaction prior to polymer processing to deactivate the polymerization catalyst and can increase the throughput of the polyester without adversely affecting the thermal stability of the polyethylene terephthalate polyester. Alternatively, the late addition of the stabilizer can increase the thermal stability of the polyester without adversely affecting the throughput of the polyethylene terephthalate polyester.

    摘要翻译： 从对苯二甲酸和乙二醇生产聚对苯二甲酸乙二醇酯聚酯的连续方法使用优选含有磷的稳定剂来生产相对不含乙醛和变色的高品质聚对苯二甲酸乙二醇酯聚酯，其与后聚合活性相关 聚合催化剂。 稳定剂优选在聚合反应结束之前或之后在聚合物加工之前加入以使聚合催化剂失活，并且可以增加聚酯的生产量而不会不利地影响聚对苯二甲酸乙二醇酯聚酯的热稳定性。 或者，稳定剂的晚期添加可以增加聚酯的热稳定性，而不会对聚对苯二甲酸乙二醇酯聚酯的生产量产生不利影响。

    Food quality polyester recycling
    28.
    发明授权
    Food quality polyester recycling 失效
    食品质量聚酯回收

    公开(公告)号：US5876644A

    公开(公告)日：1999-03-02

    申请号：US703491

    申请日：1996-08-27

    申请人： Carl S. Nichols ,  Tony Clifford Moore

    发明人： Carl S. Nichols ,  Tony Clifford Moore

    IPC分类号： B29B9/16 ,  B29B17/00 ,  B29B17/04 ,  B29C47/00 ,  B29C47/36

    CPC分类号： B29B17/0412 ,  B29B17/0026 ,  B29B9/06 ,  B29B9/16 ,  B29C2793/009 ,  B29C47/00 ,  B29C47/0011 ,  B29K2067/00 ,  B29K2067/003 ,  B29K2105/26 ,  Y02W30/62 ,  Y02W30/625 ,  Y10S264/92 ,  Y10T428/1352

    摘要： A method of recycling post-consumer polyester to obtain recycled polyester of sufficiently high purity to meet food packaging requirements is disclosed. The method includes cleaning comminuted pieces of post-consumer polyester to remove surface contaminants; melting the surface-cleaned post-consumer polyester pieces; extruding the post-consumer melt; blending the melt of post-consumer polyester with a melt of virgin polyester prepolymer; solidifying and pelletizing the blended melt while the virgin polyester prepolymer remains as prepolymer; and polymerizing the solid blended pellets in the solid state.

    摘要翻译： 公开了一种回收消费后聚酯以获得足够高纯度的回收聚酯以满足食品包装要求的方法。 该方法包括清洁粉碎的消费后聚酯片以除去表面污染物; 熔化表面清洁的消费后聚酯片; 挤出消费后的熔体; 将消费后聚酯的熔体与原始聚酯预聚物的熔体混合; 固化和造粒混合的熔体，而原始聚酯预聚物保留为预聚物; 并以固态聚合固体混合的颗粒。