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456 条记录 (耗时 0.018 秒)

    Process for the crystallizing, drying and aftercondensation of polycondensates
    61.
    发明授权
    Process for the crystallizing, drying and aftercondensation of polycondensates 失效
    缩聚物的结晶，干燥和缩聚方法

    公开(公告)号：US4584366A

    公开(公告)日：1986-04-22

    申请号：US683963

    申请日：1984-12-20

    申请人： Luder Gerking ,  Dieter O. Taurat

    发明人： Luder Gerking ,  Dieter O. Taurat

    IPC分类号： B01J8/08 ,  B29B13/00 ,  B29B13/06 ,  B29C71/00 ,  C08G63/00 ,  C08G63/78 ,  C08G63/80 ,  C08G69/00 ,  C08G69/04 ,  C08G69/46 ,  C08G63/70 ,  C08G63/74

    CPC分类号： B01J8/08 ,  B29B13/00 ,  B29B13/065 ,  C08G63/785 ,  C08G63/80 ,  B29C71/0063

    摘要： Described are a process and an apparatus for the aftercondensation of polycondensates, wherein moist and amorphous polymer in a granular or powderous form is continuously introduced from above into a single reactor. The granulate flows downward under gravity, with a hot gas being caused to flow in counter-current relation thereto. The reactor is formed as a continuous shaft or column which has positioned in the upper portion thereof an agitating element acting to prevent agglutination of the granulate. The granulate is crystallized and pre-dried in the upper portion of the shaft or column. In a further (subsequent) portion of the shaft or column, drying and aftercondensation take place without separation from the remainder of the shaft or column.

    摘要翻译： 描述了缩聚物的缩聚方法和设备，其中将粒状或粉末状的湿和无定形聚合物从上面连续引入单个反应器中。 颗粒在重力作用下向下流动，导致热气体以与其成逆流的方式流动。 反应器形成为连续的轴或柱，其在其上部定位有用于防止颗粒凝集的搅拌元件。 颗粒在轴或柱的上部结晶并预干燥。 在轴或柱的另外（后续）部分中，进行干燥和缩聚而不与轴或柱的其余部分分离。

    Process for the condensation of poly(alkylene terephthalates)
    62.
    发明授权
    Process for the condensation of poly(alkylene terephthalates) 失效
    聚（对苯二甲酸亚烷基酯）缩合的方法

    公开(公告)号：US4434276A

    公开(公告)日：1984-02-28

    申请号：US481111

    申请日：1983-03-31

    申请人： Gernot Horlbeck ,  Horst Heuer

    发明人： Gernot Horlbeck ,  Horst Heuer

    IPC分类号： C08G63/80 ,  C08G63/87 ,  C08K5/524 ,  C08G63/26

    CPC分类号： C08G63/87 ,  C08G63/80 ,  C08K5/524

    摘要： A process for the post condensation of poly(alkylene terephthalate) in the solid phase is carried out in the presence of esters of phosphorous acid at 25.degree.-65.degree. C. below the melting point of the poly(alkylene terephthalate) while passing an inert gas stream through the reaction mixture.

    摘要翻译： 聚（对苯二甲酸亚烷基酯）在固相中后凝结的方法是在低于聚对苯二甲酸亚烷基酯的熔点25-65℃的亚磷酸酯的存在下进行，同时通过惰性 气流通过反应混合物。

    Process for the production of high molecular weight polyester
    63.
    发明授权
    Process for the production of high molecular weight polyester 失效
    生产高分子量聚酯的方法

    公开(公告)号：US4374975A

    公开(公告)日：1983-02-22

    申请号：US345172

    申请日：1982-02-02

    申请人： Ben Duh

    发明人： Ben Duh

    IPC分类号： C08G63/00 ,  C08G63/78 ,  C08G63/80 ,  C08G63/70

    CPC分类号： C08G63/80

    摘要： A process for the continuous production of high molecular weight polyethylene terephthalate wherein the crystallized prepolymer having an intrinsic viscosity of at least 0.3 is dried, preheated and polymerized in a single moving bed reaction zone. The method is characterized by an inert gas atmosphere and a reaction zone with a temperature gradiant ranging from about 170.degree. C. at the uppermost portion and a higher temperature of about 225.degree. C. at the lowermost portion.

    摘要翻译： 连续生产高分子量聚对苯二甲酸乙二醇酯的方法，其中特性粘度至少为0.3的结晶预聚物在单个移动床反应区中被干燥，预热和聚合。 该方法的特征在于惰性气体气氛和在最下部分具有约170℃的温度梯度和约225℃的较高温度的反应区。

    Polyethylene terephthalates which crystallize rapidly and a process for their preparation
    65.
    发明授权
    Polyethylene terephthalates which crystallize rapidly and a process for their preparation 失效
    聚对苯二甲酸乙二醇酯快速结晶，其制备方法

    公开(公告)号：US4314928A

    公开(公告)日：1982-02-09

    申请号：US164458

    申请日：1980-06-30

    申请人： Peter Bier ,  Rudolf Binsack

    发明人： Peter Bier ,  Rudolf Binsack

    IPC分类号： C08G63/78 ,  C08G63/00 ,  C08G63/181 ,  C08G63/183 ,  C08G63/80 ,  C08L67/00

    CPC分类号： C08G63/80 ,  C08G63/183

    摘要： The present invention relates to a polyethylene terephthalate copolyester which crystallizes rapidly and a process to synthesize such a polymer. The polymer is produced by melt homogenizing pure polyethylene terephthalate segments (with minimum intrinsic viscosities above about 0.2 dl/g) with certain specified C.sub.4-10 diols, allowing the mixture to solidify and subjecting the solid product to a solid phase post-condensation reaction. The copolyester has a minimum intrinsic viscosity of 0.4 dl/g and crystallizes more rapidly than either pure polyethylene terephthalate of equivalent molecular weight or copolyester from the same acid and diol units wherein the pure polyethylene terephthalate segments are not significantly prepolymerized before reaction with the co-diols. In a preferred embodiment about 0.23 to 9.1 parts of co-diol per 100 parts of polyethylene terephthalate segment are melt homogenized in an extruder and the extrudate is subject to solid state condensation by the application of elevated temperatures and reduced pressure.

    摘要翻译： 本发明涉及一种快速结晶的聚对苯二甲酸乙二醇酯共聚酯和一种合成这种聚合物的方法。 通过将纯聚对苯二甲酸乙二醇酯片段（具有最高特性粘度高于约0.2dl / g）与某些特定的C 4-10二醇熔融均匀来制备聚合物，使混合物固化并使固体产物进行固相缩合反应。 共聚多酯具有0.4dl / g的最小特性粘度并且比来自相同的酸和二醇单元的当量分子量的纯聚对苯二甲酸乙二醇酯或共聚多酯结晶得更快，其中纯聚对苯二甲酸乙二醇酯链段在与共聚酯反应之前没有显着预聚， 二醇。 在优选的实施方案中，每100份聚对苯二甲酸乙二醇酯链段约0.23至9.1份共二醇在挤出机中熔融均化，并通过施加升高的温度和减压使挤出物进行固态冷凝。

    Chain couplers for polyesterification and novel polyesters
    68.
    发明授权
    Chain couplers for polyesterification and novel polyesters 失效
    用于聚酯和新型聚酯的链条联轴器

    公开(公告)号：US3962190A

    公开(公告)日：1976-06-08

    申请号：US449012

    申请日：1974-03-07

    申请人： Robert L. Wear

    发明人： Robert L. Wear

    IPC分类号： C08G63/20 ,  C08G63/80

    CPC分类号： C08G63/20 ,  C08G63/80

    摘要： Addition of polycarboxylic chain coupling compounds of the formula: ##SPC1##To a polyesterification reaction mixture of at least one polyol and at least one polycarboxylic compound (other than the polycarboxylic chain coupling compound) after polyesterification has begun increases the polymerization rate and does not diminish physical properties of the polyester.