申请人:Shtarov Alexander Borisovich
公开号:US20110009668A1
公开(公告)日:2011-01-13
Current methods for making polyfluorosulfonamido amines, which involve the use of a diamine reactant, provide low yields and produce an undesirable fluorine containing bis-sulfonamide by-product representing an economic loss. The bis-sulfonamide by-product is particularly undesirable because it shares very similar physical properties with the desired monoamine product thus making isolation of the desired polyfluorosulfonamido amine product difficult and costly. Furthermore, instead of the efficient incorporation of fluorine to make the desired polyfluorosulfonamido amine product, the bis-sulfonamide by-product constitutes a substantial loss of costly fluorinated starting material. The bis-sulfonamide by-product also constitutes an undesirable impurity that can worsen surfactancy, repellency, or other performance characteristics of the desired polyfluorosulfonamido amine product. The present invention provides a method of making a polyfluorosulfonamido amine without the production of a bis-sulfonamide by-product by reacting a polyfluoroalkylsulfonic compound with a monoamino amide rather than with a diamine reactant as in previously known methods.
目前制备聚氟磺酰胺胺的方法涉及使用二胺反应剂,产率低且会产生不良的含氟双磺酰胺副产物,造成经济损失。双磺酰胺副产物特别不受欢迎,因为它与所需的单胺产物具有非常相似的物理性质,因此使得隔离所需的聚氟磺酰胺胺产品变得困难和昂贵。此外,双磺酰胺副产物不仅不能有效地将氟元素纳入制备所需的聚氟磺酰胺胺产品中,而且还构成了昂贵的含氟起始物质的重大损失。双磺酰胺副产物还构成了不良杂质,可能会恶化所需的聚氟磺酰胺胺产品的表面活性、防水性或其他性能特征。本发明提供了一种制备聚氟磺酰胺胺的方法,不会产生双磺酰胺副产物,而是使用聚氟烷基磺酸化合物与单胺酰胺反应,而不是像以前已知的方法中使用二胺反应剂。