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1. 发明授权

US5656719A Condensation injection molding process for producing bottle preforms of polyethylene terephthalate and/or its copolyesters and resultant preforms 失效
标题翻译：用于生产聚对苯二甲酸乙二醇酯和/或其共聚酯和所得预制品的瓶坯的冷凝注塑方法
公开(公告)号：US5656719A
公开(公告)日：1997-08-12
申请号：US601580
申请日：1996-02-14
申请人： Werner Stibal , Werner Kaegi , Joachim Ensinger , Klaus Nothhelfer
发明人： Werner Stibal , Werner Kaegi , Joachim Ensinger , Klaus Nothhelfer
IPC分类号： B29B11/08 , B29C45/00 , B29C49/06 , B29K67/00 , C08G63/88 , C08J3/00
CPC分类号： C08G63/88 , B29C45/0001 , B29K2067/00 , B29K2105/0002 , B29K2105/253 , B29K2667/00 , Y02P20/544
摘要： A process for producing bottle preforms from the melt of polyethylene terephthalate and/or its copolyesters, includes selectively introducing an inert gas into the continuous flow or partial flow of the polyester melt from a poly-condensation having an intrinsic viscosity between 0.5 and 0.75 dl/g, subsequently bringing the melt to an acetaldehyde content below 10 ppm in a melt after-condensation reactor and to an intrinsic viscosity of 0.75 to 0.95 dl/g and thereafter guiding the melt into an injection molding tool and processing same.
摘要翻译：从聚对苯二甲酸乙二醇酯和/或其共聚酯的熔体生产瓶预成型件的方法包括选择性地将惰性气体从特性粘度在0.5至0.75dl / g之间的聚缩合物引入到聚酯熔体的连续流动或部分流动中，随后在熔融缩合反应器中使熔体的乙醛含量低于10ppm，特性粘度为0.75至0.95dl / g，然后将熔体引入注模工具并进行加工。

2. 发明授权

US5656700A Process for preparing linear copolyesters containing omega-hydroxycarboxylic acid units 失效
标题翻译：制备含有ω-羟基羧酸单元的线性共聚酯的方法
公开(公告)号：US5656700A
公开(公告)日：1997-08-12
申请号：US516177
申请日：1995-08-17
申请人： Werner Kagi , Klaus Nothhelfer , Werner Stibal
发明人： Werner Kagi , Klaus Nothhelfer , Werner Stibal
IPC分类号： C08G63/20 , C08G63/60 , C08G63/78 , C08G63/91 , C08L67/00 , D01F6/84
CPC分类号： C08G63/60 , C08G63/78 , Y10T428/2913
摘要： A process for preparing linear copolyesters which contain omega-hydrocarboxylic acid units, from polyesters that contain at least 90 mol % polyethylene terephthalate units, as well as the usual amount of diethylene glycol units and possibly the known catalysts and stabilizers, includes adding to the already prepared polyester melt at least one compound of the group of lactones, optionally along with further additives but without additional catalysts in a system sealed off from gas exchange and at a higher pressure than the lactone vapor pressure in a proportion of up to 10 mol %, referred to the final melt, and mixed intensively with the melt. The resultant copolyesters, after a total dwell time of less than 30 minutes and a temperature in the range of 265.degree. to 310.degree. C., are further processed or discharged, granulated and subsequently further processed, wherein the copolyesters are identical in viscosity to the starting polyesters and contain randomly distributed omega-hydroxycarboxylic acid units in the polymer chains and whereby the sealed system is a pipe which is under pressure and is provided with a dosing opening and with a mixer downstream of the dosing opening.
摘要翻译：制备含有ω-羟基羧酸单元的线性共聚酯的方法，其由含有至少90mol％聚对苯二甲酸乙二醇酯单元的聚酯以及通常量的二甘醇单元以及可能已知的催化剂和稳定剂组成，包括加入已经制备的聚酯熔融内酯的至少一种化合物，任选地与另外的添加剂一起，但在气体交换密封的体系中并且在比内酯蒸气压更高的压力下，以高达10mol％的比例，不含另外的催化剂，称为最终熔体，并与熔体密集地混合。在总停留时间少于30分钟，温度在265至310℃之间的所得共聚酯进一步加工或排出，造粒并随后进一步加工，其中共聚酯的粘度与起始聚酯并且在聚合物链中含有随机分布的ω-羟基羧酸单元，由此密封系统是处于压力下的管并且具有计量开口并且在配量开口下游具有混合器。

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