Methods for producing submicron polytetrafluoroethylene powder and products thereof
    4.
    发明授权
    Methods for producing submicron polytetrafluoroethylene powder and products thereof 有权
    亚微米聚四氟乙烯粉末的制造方法及其制造方法

    公开(公告)号:US07482393B2

    公开(公告)日:2009-01-27

    申请号:US11024582

    申请日:2004-12-29

    IPC分类号: C08F2/46 C08J3/28

    摘要: 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 μm 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 self-agglomerate. 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.

    摘要翻译: 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1.00μm的颗粒尺寸的粉末。 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。 这种方法的亚微米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“粉尘”或自聚集。 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。

    Composition of matter useful as an oil spill flocculating agent
    5.
    发明授权
    Composition of matter useful as an oil spill flocculating agent 失效
    作为溢油絮凝剂有用的物质组成

    公开(公告)号:US5725805A

    公开(公告)日:1998-03-10

    申请号:US667165

    申请日:1996-06-20

    摘要: An organoclay made by the reaction of smectite clay and a quaternary ammonium compound derived from an oil having 50% or more of its carbon chain lengths consisting of C.sub.14 or lower is described as an effective oil spill remediation agent. Oils used include coconut, babasso and palm-kennel oil. Such organoclay's effectiveness as an oil spill remediation agent, and that of organoclays can be increased by (a) further treatment with a water insoluble compound such as vegetable oil and b) by mixture with an organic fibrous material such as waste paper pulp. The agents produced are particularly effective in polar and arctic waters in maintaining buoyancy of the oil agglomeration formed by their use. Methods of remediating oil spills using organoclays particularly useful in regions such as waters of the Alaska oceans and inlets of the North Sea are also described.

    摘要翻译: 通过蒙皂石粘土和衍生自其碳链长度为C14以下的碳含量的50%以上的油的季铵化合物的反应制成的有机粘土被描述为有效的溢油补救剂。 所用的油包括椰子,巴巴索和棕榈油。 通过(a)用植物油等水不溶性化合物进一步处理,以及b)通过与有机纤维材料如废纸浆的混合,可以提高这种有机粘土作为溢油补救剂和有机粘土的有效性。 生产的试剂在极地和北极水域特别有效,保持了由其使用形成的油组合的浮力。 还描述了使用在阿拉斯加海洋和北海入口等区域特别有用的有机粘土来修复漏油的方法。

    Process for deinking wastepaper utilizing organoclays formed in situ
    6.
    发明授权
    Process for deinking wastepaper utilizing organoclays formed in situ 失效
    使用原位形成的有机粘土脱墨废纸的方法

    公开(公告)号:US5336372A

    公开(公告)日:1994-08-09

    申请号:US944624

    申请日:1992-09-14

    IPC分类号: C01B39/44 D21C5/02 D21F5/02

    摘要: A process for deinking wastepaper, which comprises: (a) forming an organoclay deinking agent in an aqueous system; (b) contacting ink from wastepaper in the aqueous system with an amount of the organoclay deinking agent effective to deink the wastepaper; and ( c ) recovering deinked paper pulp from the aqueous system.

    摘要翻译: 一种废纸脱墨方法,包括:(a)在水性体系中形成有机粘土脱墨剂; (b)将含水体系中废纸的墨水与有效脱墨废纸的有机粘土脱墨剂接触; 和(c)从水系统中回收脱墨纸浆。

    Thermosetting polyurethane structural adhesive compositions and
processes for producing the same
    7.
    发明授权
    Thermosetting polyurethane structural adhesive compositions and processes for producing the same 失效
    热固性聚氨酯结构胶粘剂组合物及其制备方法

    公开(公告)号:US5231147A

    公开(公告)日:1993-07-27

    申请号:US842756

    申请日:1992-02-28

    摘要: The present invention relates to thermosetting polyurethane structural adhesive composites and compositions and processes for producing the same comprising dispersing an amine-terminated solid polyamide resin into a polyurethane base resin to form a nonactivated adhesive composite, and activating the same by heating to form an adhesive composition. Another aspect of the invention relates to dispersing an amine-terminated solid polyamide resin and a water generating compound into the polyurethane base resin and heat-activating the same to form an adhesive composition. The invention also relates to polyurethane base resins suitable for use in the processes of the invention, which may also be moisture cured to form a reactive adhesive composition.

    摘要翻译: 本发明涉及热固性聚氨酯结构粘合剂复合材料及其制备方法,包括将胺封端的固体聚酰胺树脂分散在聚氨酯基础树脂中以形成非活性粘合剂复合材料,并通过加热活化以形成粘合剂组合物 。 本发明的另一方面涉及将胺封端的固体聚酰胺树脂和产水化合物分散到聚氨酯基础树脂中并对其进行热活化以形成粘合剂组合物。 本发明还涉及适用于本发明方法的聚氨酯基础树脂,其也可以湿固化以形成反应性粘合剂组合物。