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1. 发明申请

US20090054618A1 Polybutylene terephthalate and process for producing thereof 审中-公开
标题翻译：聚对苯二甲酸丁二醇酯及其制造方法
公开(公告)号：US20090054618A1
公开(公告)日：2009-02-26
申请号：US11990916
申请日：2006-08-28
申请人： Kenji Noda , Masanori Yamamoto , Shinichiro Matsuzono , Toshiyuki Hamano , Yoshio Akahane , Hidekazu Shouji
发明人： Kenji Noda , Masanori Yamamoto , Shinichiro Matsuzono , Toshiyuki Hamano , Yoshio Akahane , Hidekazu Shouji
IPC分类号： C08G63/183 , C08G63/85
CPC分类号： C08G63/85 , C08G63/80
摘要： An object of the present invention is to provide polybutylene terephthalate which has excellent color tone, hydrolysis resistance, heat stability, transparency and moldability as well as a less content of impurities, can be produced with maintaining its productivity while preventing from generation of tetrahydrofuran as a by-product, and can be suitably applied to films, monofilaments, fibers, electric and electronic parts, automobile parts, etc.In an aspect of the present invention, there is provided a process for continuously producing polybutylene terephthalate from terephthalic acid and 1,4-butanediol in a presence of a catalyst comprising a titanium compound and a compound of at least one metal selected from Group 1 and Group 2 of the Periodic Table, which process satisfies such the following requirements (a) to (c) that: (a) an oligomer is obtained by conducting a continuously esterification reaction of terephthalic acid and 1,4-butanediol in the presence of titanium catalyst in an amount of not more than 460 μmol as a titanium atom based on 1 mol of terephthalic acid unit; (b) polycondensation reaction of the said oligomer is continuously conducted in the presence of compound of at least one metal selected from Group 1 and Group 2 of the Periodic Table as the catalyst in an amount of not more than 450 μmol as the metal atom based on 1 mol of terephthalic acid unit; and (c) the said compound of at least one metal may be added to a stage before obtaining an oligomer having esterification conversion of not less than 90% in an amount of not more than 300 μmol as the metal atom based on 1 mol of terephthalic acid unit, and the said compound of at least one metal may be added to a stage on or after obtaining an oligomer having esterification conversion of not less than 90% in an amount of not less than 10 μmol as the metal atom based on 1 mol of terephthalic acid unit.
摘要翻译：本发明的目的是提供具有优异色调，耐水解性，热稳定性，透明性和成型性以及较少杂质含量的聚对苯二甲酸丁二醇酯，同时保持其生产率，同时防止产生四氢呋喃作为副产物，可适用于薄膜，单丝，纤维，电气电子部件，汽车部件等。在本发明的一个方面，提供了一种从对苯二甲酸和1，在包含钛化合物和选自元素周期表第1族和第2族中的至少一种金属的化合物的催化剂存在下，该方法满足以下要求（a）至（c）：（ a）通过在钛催化剂的存在下进行对苯二甲酸和1,4-丁二醇的连续酯化反应获得低聚物相对于1摩尔对苯二甲酸单元，钛原子为460摩尔以下的量; （b）所述低聚物的缩聚反应在作为催化剂的至少一种选自元素周期表第1族和第2族的金属的化合物存在下连续进行，其金属原子数不超过450μmol 在1mol对苯二甲酸单元上; 和（c）所述至少一种金属的化合物可以在获得具有不低于90％的酯化转化率的低聚物之后的阶段中加入到作为金属原子的不超过300μmol的量，基于1mol对苯二甲酸酸单元，并且所述至少一种金属的化合物可以在获得基于1摩尔的金属原子的不少于10摩尔的酯化转化率为90％以上的低聚物或其后添加的对苯二甲酸单元。

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