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    • 4. 发明申请
    • METHODS FOR PRODUCING SUBMICRON POLYTETRAFLUOROETHYLENE POWDER AND PRODUCTS THEREOF
    • 生产亚磷酸三氟乙烯粉末及其制品的方法
    • WO03106540A3
    • 2004-05-13
    • PCT/US0307978
    • 2003-03-14
    • SHAMROCK TECH INCCODY CHARLES ANEUBERG WILLIAMSUI MANSHIAWAD YOUSSEF
    • CODY CHARLES ANEUBERG WILLIAMSUI MANSHIAWAD YOUSSEF
    • C08J3/12C08J3/28B29B9/00
    • C08J3/28C08J3/12C08J2327/18Y10T428/2982
    • A method for producing submicron polytetrafluoroethylene ("PTFE") powder in a free-flowing, readily dispersible form. The irradiated PTFE starting material is placed in a desired solvent and undergoes grinding until the PTFE particles reach submicron size. The submicron particles are subsequently recovered from the solvent and dried to form a powder that may have particles less than 1.00 [tm in size. The dry PTFE powder may then be readily dispersed to submicron size into a desired application system. The submicron PTFE powder of this method is free-flowing, readily dispersible in various application systems, tends not to "dust" or selfagglomerate. Improved aqueous and organic dispersions of submicron PTFE particles may also be formed that display increased stability and require much less agitation than other processes of forming such dispersions. Such improved PTFE dispersions may be formed with or without the addition of surfactants, wetting agents, rheology modifiers, pH-adjusting agents, and the like.
    • 以自由流动,容易分散的形式生产亚微米聚四氟乙烯(“PTFE”)粉末的方法。 将被照射的PTFE原料置于所需的溶剂中并进行研磨直到PTFE颗粒达到亚微米尺寸。 亚微米颗粒随后从溶剂中回收并干燥以形成可以具有小于1.00 [tm]的颗粒的粉末。 然后可以将干燥的PTFE粉末容易地分散到亚微米尺寸到所需的应用系统。 该方法的亚微米PTFE粉末是自由流动的,易于分散在各种应用系统中,倾向于不会“灰尘”或自聚结。 还可以形成改进的亚微米PTFE颗粒的水性和有机分散体,其显示出增加的稳定性并且需要比其它形成这种分散体的方法少得多的搅拌。 这种改进的PTFE分散体可以在添加或不添加表面活性剂,润湿剂,流变改性剂,pH调节剂等的情况下形成。