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1. 发明授权

US06787630B1 Process for the preparation of heat-stable, antimony-free polyesters of neutral color and the products which can be prepared by this process 失效
标题翻译：用于制备中性色热稳定，无锑聚酯的方法以及可通过该方法制备的产品
公开(公告)号：US06787630B1
公开(公告)日：2004-09-07
申请号：US08520662
申请日：1995-08-28
申请人： Ligia Dominguez De Walter , Banks Bryan Moore , Peter Klein
发明人： Ligia Dominguez De Walter , Banks Bryan Moore , Peter Klein
IPC分类号： C08G6382
CPC分类号： C08G63/20 , C08G63/60 , C08G63/82 , C08G63/85 , C08G63/87
摘要： Process for the preparation of heat-stable, antimony-free polyesters of neutral color and the products which can be prepared by this process A process for the preparation of heat-stable, antimony-free polyesters of neutral color by esterification of aromatic dicarboxylic acids or transesterification of lower aliphatic esters of aromatic dicarboxylic acids with aliphatic diols and subsequent polycondensation in which a possible transesterification is carried out in the presence of 20 to 120 ppm, based on the catalyst metal, of a transesterification catalyst, after the esterification or transesterification has ended, phosphoric acid, phosphorous acid and/or phosphonic acids or a derivative thereof are added to the esterification or transesterification batch as a completing agent in an amount which is 100% of the amount equivalent to the transesterification catalyst employed and up to 99% of the amount equivalent to the cobalt to be employed, up to 80 ppm of cobalt in the form of a cobalt compound are then added to the batch, and the polycondensation is carried out without the addition of antimony, in the presence of 1 to 10 ppm of titanium, which is added in the form of a titanium compound, and if appropriate in the presence of up to 1000 ppm of organic compounds which donate crosslinking structural groups (pentaerythritol) and if appropriate up to 50 ppm of an optical brightener, is described. The polyester obtainable by this process is furthermore described.
摘要翻译：用于制备中性色的热稳定，无锑聚酯的方法以及可通过该方法制备的产品一种通过芳族二羧酸酯化或酯交换反应制备中性色热稳定的无锑聚酯的方法的芳族二羧酸的低级脂族酯与脂肪族二醇的混合物，随后缩聚，其中在酯化或酯交换反应结束后，基于催化剂金属，酯交换催化剂为20〜120ppm，可能进行酯交换反应，将磷酸，亚磷酸和/或膦酸或其衍生物作为完成剂加入酯化或酯交换批次中，其量为与所用酯交换催化剂相当的量的100％，高达99％的量相当于所用的钴，高达80ppm的钴形式的钴然后将化合物加入到批料中，并且在1至10ppm的钛的存在下，不加入锑进行缩聚，钛以钛化合物的形式加入，并且如果合适的话，在上述的存在下至1000ppm的赋予交联结构基团（季戊四醇）的有机化合物，如果合适，则为高达50ppm的荧光增白剂。此外还描述了可通过该方法获得的聚酯。

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