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5 条记录 (耗时 0.016 秒)

    Method for the preparation of aqueous dispersions of polytetrafluoroethylene with halogenated hydrocarbon as stabilizing agent
    3.
    发明授权
    Method for the preparation of aqueous dispersions of polytetrafluoroethylene with halogenated hydrocarbon as stabilizing agent 失效
    用卤代烃作为稳定剂制备聚四氟乙烯水分散体的方法

    公开(公告)号：US4025481A

    公开(公告)日：1977-05-24

    申请号：US580033

    申请日：1975-05-22

    申请人： Claude Tournut ,  Edouard Grimaud

    发明人： Claude Tournut ,  Edouard Grimaud

    IPC分类号： C08F14/26 ,  C08L27/18

    CPC分类号： C08F14/26 ,  C08F2438/01

    摘要： This invention relates to a method for the preparation of aqueous dispersions of polytetrafluoroethylene comprising polymerizing tetrafluoroethylene in an aqueous medium containing a polymerization initiator and an appropriate emulsifying agent as well as other necessary additives in the presence of a stabilizing amount of a stabilizing agent selected to be a saturated halogenated acyclic or cyclic hydrocarbon containing less than about 20 carbon atoms or an unsaturated halogenated acyclic or cyclic hydrocarbon containing less than about 20 carbon atoms which is not copolymerizable with the tetrafluoroethylene under the reaction conditions, or a mixture of said halogenated hydrocarbons.

    摘要翻译： 本发明涉及一种制备聚四氟乙烯水分散体的方法，其包括在稳定剂量的稳定剂存在下，在含有聚合引发剂和合适的乳化剂的水性介质中聚合四氟乙烯以及其它必需的添加剂，所述稳定剂选自 或含有少于约20个碳原子的饱和卤代无环或环状烃或含有少于约20个碳原子的不饱和卤代无环或环烃，其在反应条件下不与四氟乙烯共聚，或所述卤代烃的混合物。

    Process for providing a polytetrafluoroethylene coating on the walls of a metal body
    4.
    发明授权
    Process for providing a polytetrafluoroethylene coating on the walls of a metal body 失效
    在金属体的壁上提供聚四氟乙烯涂层的方法

    公开(公告)号：US4368217A

    公开(公告)日：1983-01-11

    申请号：US265788

    申请日：1981-05-21

    申请人： Claude Tournut

    发明人： Claude Tournut

    IPC分类号： B05D3/12 ,  B05D7/22 ,  B29C43/00 ,  B29C51/00 ,  B29C63/00 ,  B29C63/34 ,  B29C67/04 ,  B05D3/02 ,  B05D7/24

    CPC分类号： B05D7/222 ,  B29C67/04 ,  B05D1/42 ,  B05D2506/15 ,  B05D3/0254 ,  B05D3/12 ,  B05D5/083 ,  B29C43/006

    摘要： The invention relates to a process for providing an adherent coating of polytetrafluoroethylene (PTFE) on the inner walls of a hollow metal body wherein a flexible membrane is used to form a space between the inner walls of the hollow metal body and the inner walls of a flexible membrane, filling the space with PTFE, compressing the PTFE by deformation of the membrane under isostatic pressure, removing the membrane, filling the inner cavities of the hollow metal body with a substantially incompressible solid substance having fluid flow characteristics and being thermally stable at the temperatures to which the PTFE is to be heated, heating the thus-formed assembly to a temperature above the melting point of the polytetrafluoroethylene for a period of time sufficient for the latter to lose its crystallinity.

    摘要翻译： 本发明涉及一种在中空金属体的内壁上提供聚四氟乙烯（PTFE）的粘合涂层的方法，其中柔性膜用于在中空金属体的内壁和内壁之间形成空间 柔性膜，用PTFE填充空间，通过在等压下的膜的变形来压缩PTFE，去除膜，用具有流体流动特性的基本上不可压缩的固体物质填充中空金属体的内腔，并且在 加热PTFE的温度，将由此形成的组件加热到高于聚四氟乙烯熔点的温度一段足以使其失去其结晶度的时间。

    Positively charged aqueous dispersions of polytetrafluoroethylene and method for preparing the same
    5.
    发明授权
    Positively charged aqueous dispersions of polytetrafluoroethylene and method for preparing the same 失效
    聚四氟乙烯的带正电荷的水分散体及其制备方法

    公开(公告)号：US3968069A

    公开(公告)日：1976-07-06

    申请号：US505066

    申请日：1974-09-11

    申请人： Edouard Grimaud ,  Claude Tournut

    发明人： Edouard Grimaud ,  Claude Tournut

    IPC分类号： C08J3/03 ,  C08L27/18

    CPC分类号： C08J3/03 ,  C08J2327/18 ,  Y10T428/3154

    摘要： This invention relates to aqueous dispersions of positively charged polytetrafluoroethylene.This inventon also relates to a process for preparing aqueous dispersions of positively charged polytetrafluoroethylene which comprises adding an aqueous dispersion of negatively charged polytetrafluoroethylene containing an anionic emulsifier to an aqueous solution of a cationic emulsifier kept under light agitation while maintaining a ratio of the molar concentration of cationic emulsifier to that of the anionic emulsifier greater than 1:1.

    摘要翻译： 本发明涉及带正电的聚四氟乙烯的水分散体。