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1.发明授权
公开(公告)号：US5543495A
公开(公告)日：1996-08-06
申请号：US207733
申请日：1994-03-08
申请人： Colin Anolick , Gregory D. Cramer , Ramdas Dujari , Win-Chung Lee , Sundar M. Rao , Robert C. Wheland
发明人： Colin Anolick , Gregory D. Cramer , Ramdas Dujari , Win-Chung Lee , Sundar M. Rao , Robert C. Wheland
IPC分类号： C08G69/04 , C08G63/78 , C08G63/83 , C08G63/87 , C08G63/88 , C08G69/00 , C08G69/28 , C08G85/00 , C08G69/46 , C08G69/48
摘要： This invention concerns a process for increasing the molecular weight and viscosity of polyamides and other condensation polymers, by first injecting an inert gas into the polymer melt at elevated pressure, then stripping the volatiles from the polymer through the application of reduced pressure, followed by holding the polymer at elevated temperatures long enough for the reaction to occur. Activators may be added to the polymer. Port areas used in the stripping zone, may be kept hot for continuous operation.
摘要翻译： 本发明涉及一种提高聚酰胺和其它缩合聚合物的分子量和粘度的方法，方法是首先将惰性气体在升高的压力下注入聚合物熔体中，然后通过施加减压从聚合物中汽提挥发物，然后保持 聚合物在升高的温度下足以使反应发生。 可以将活化剂加入到聚合物中。 在剥离区使用的端口区域可以保持热持续运行。
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公开(公告)号：US5420230A
公开(公告)日：1995-05-30
申请号：US124142
申请日：1993-09-20
摘要： Disclosed is a process for preparing nylon by adding an amidation catalyst concentrated in "masterbatches" to the process melt resulting in a product with increased molecular weight and viscosity.
摘要翻译： 公开了通过将浓缩在“母料”中的酰胺化催化剂加入到工艺熔体中制备尼龙的方法，得到具有增加的分子量和粘度的产物。
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公开(公告)号：US5539079A
公开(公告)日：1996-07-23
申请号：US388014
申请日：1995-02-14
摘要： Disclosed is a process for preparing nylon by adding an amidation catalyst concentrated in "masterbatches" to the process melt resulting in a product with increased molecular weight and viscosity.
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公开(公告)号：US5955569A
公开(公告)日：1999-09-21
申请号：US757310
申请日：1996-11-27
CPC分类号： C08G69/30 , Y02P20/584
摘要： An improved method for increasing the relative viscosity and molecular weight of a polyamide polymer (such as nylon 6,6, nylon 6, and the like) while in the solid state involving the use of a phosphorus-containing catalyst (such as 2(2'-pyridyl) ethyl phosphonic acid or the like) in combination with an oxygen free gas characterized by a low dew point (typically below 30.degree. C. and preferably below -30.degree. C.). The combination of affording commercial operation at greater through put at lower temperature. Such a process is of particular value during the production of terpolyamide and multipolyamide polymer intended for use in colored nylon fiber manufacture.
摘要翻译： 在涉及使用含磷催化剂的固体状态（例如2（2））中，提高聚酰胺聚合物（例如尼龙6,6，尼龙6等）的相对粘度和分子量的改进方法 乙基膦酸等）与无氧气体组合，其特征在于低露点（通常低于30℃，优选低于-30℃）。 通过在较低温度下提供商业运作的组合。 在制造用于着色尼龙纤维制造中的三聚酰胺和多聚酰胺聚合物的生产期间，这种方法是特别有价值的。
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5.发明授权
公开(公告)号：US5698658A
公开(公告)日：1997-12-16
申请号：US657745
申请日：1996-05-31
摘要： A linear polyamide having a weight average molecular weight above 200,000 is made by heating a lower molecular weight molten polyamide with thorough mixing at a temperature of about 265.degree.-300.degree. C. for at least 5 minutes while an inert gas is swept gently through the reactor, the increase of molecular weight of the polyamide being catalyzed by a particular phosphinic acid derivative.
摘要翻译： 通过在约265℃-300℃的温度下充分混合加热较低分子量的熔融聚酰胺至少5分钟，同时将惰性气体轻轻地扫过该混合物，从而制得重均分子量大于20万的直链聚酰胺 反应器中，由特定次膦酸衍生物催化的聚酰胺的分子量的增加。
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