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    • 91. 发明授权
    • Conductive polyurethane foam and its manufacture
    • 导电聚氨酯泡沫及其制造
    • US5591482A
    • 1997-01-07
    • US197983
    • 1994-02-17
    • Fei-feng HeToshihiro YamamotoMiwako Yamamoto
    • Fei-feng HeToshihiro YamamotoMiwako Yamamoto
    • C08G61/10C08G61/12C08J9/36C08J9/40H01B1/12B05D5/12B05D3/00
    • C08J9/405C08G61/124H01B1/127C08J2375/04
    • A method of manufacturing a conductive polyurethane foam in which the polymerization is made easy, the refinement of pyrrole or the like is not required, the recovery rate of a solvent is enhanced, and the pre-treatment is not required at all; and a conductive polyurethane foam having excellent performances. This method includes a process: of coating an oxidizer solution (methanol solution containing FeCl.sub.3 and FeCl.sub.2) on surfaces of cells of a soft polyurethane foam; a process of perfectly removing the solvent of the oxidizer solution by vacuum drying; a process of polymerizing a compound (pyrrole or the like) with conjugated double bonds on the surfaces of cells of the continuous forming type polyurethane foam after being coated with the oxidizer in a vapor-phase atmosphere for forming a conductive electronic conjugated polymer layer (polypyrrole layer or the like) of the compound on the surfaces of the cells; a process of dipping the polyurethane foam formed with the polymer layer in a solvent for extracting the pyrrole and the oxide; and a process for vacuum-drying it. A conductive polyurethane foam can be continuously manufactured by this process. The conductive polyurethane foam thus manufactured has an electric conductivity ranging from 10.sup.-7 to 10.sup.-2 S/cm.
    • 制造其中使聚合变得容易的导电性聚氨酯泡沫体的方法,不需要精制吡咯等,溶剂的回收率提高,并且根本不需要预处理; 和具有优异性能的导电聚氨酯泡沫。 该方法包括在软质聚氨酯泡沫体的表面上涂布氧化剂溶液(含有FeCl 3和FeCl 2的甲醇溶液)的方法; 通过真空干燥完全除去氧化剂溶液的溶剂的方法; 在形成导电性电子共轭聚合物层(聚吡咯)的气相气氛中用氧化剂涂布后,在连续成型型聚氨酯泡沫体的表面上使具有共轭双键的化合物(吡咯等)聚合的方法 层等)化合物在细胞表面上; 将由聚合物层形成的聚氨酯泡沫浸渍在萃取吡咯和氧化物的溶剂中的方法; 以及真空干燥方法。 可以通过该方法连续制造导电聚氨酯泡沫。 由此制造的导电聚氨酯泡沫具有10-7至10-2S / cm的电导率。
    • 92. 发明授权
    • Method for producing a dimensionally graded conductive foam
    • 制造尺寸均匀的导电泡沫的方法
    • US5523119A
    • 1996-06-04
    • US405524
    • 1995-03-16
    • Urszula G. WettermarkGregory H. Worrell
    • Urszula G. WettermarkGregory H. Worrell
    • C08J9/40H01B1/12B05D5/12B05D1/18B05D1/36B05D3/04
    • C08J9/405H01B1/127C08J2375/04Y10T428/249953Y10T428/249961Y10T428/249987
    • A dimensionally graded electroconductive and electromagnetically responsive composite material is produced by contacting a polyurethane open cell foam substrate with a solution of an oxidatively polymerizable compound, such as pyrrole, that is polymerized to form a thin electroconductive polymer coating on the foam's surfaces. The reaction, wherein the compound is oxidized and polymerized to form a conductive polymer occurs over time. By varying the amount of time the porous foam substrate is in contact with the reacting solution a graded amount of electroconductive polymer is deposited on the foam substrate. The electrical activity of the resultant electrically conducting polyurethane/polypyrrole composite foam is measured as a Free Field Transmission loss at the microwave frequency of 10 GHz and expressed in "-dB". The polyurethane/polypyrrole composite foam with dimensionally graded electrical conductivity/activity constitutes a new bulk absorber.
    • 通过将聚氨酯开孔泡沫基材与可聚合的化合物如吡咯的溶液接触,制得尺寸分级的导电和电磁响应的复合材料,其被聚合以在泡沫表面上形成薄的导电聚合物涂层。 其中化合物被氧化和聚合以形成导电聚合物的反应随时间发生。 通过改变多孔泡沫基材与反应溶液接触的时间量,将分级量的导电聚合物沉积在泡沫基材上。 所得导电聚氨酯/聚吡咯复合泡​​沫体的电活性在10GHz的微波频率下测量为自由场传输损耗,并以“-dB”表示。 具有尺寸分级电导率/活性的聚氨酯/聚吡咯复合泡​​沫体构成新的散料吸收体。
    • 95. 发明授权
    • Method of improving foam fire resistance through the introduction of
inorganic particles thereinto
    • 通过引入无机颗粒来改善泡沫耐火性的方法
    • US5011558A
    • 1991-04-30
    • US478825
    • 1990-02-21
    • Francis U. HillLola E. Crosswhite
    • Francis U. HillLola E. Crosswhite
    • C08J9/40
    • C08J9/40C08J2379/08Y10S521/918
    • A method of improving the flame resistance of foams, such as open cell polyimide foams, through the introduction of finely divided non-metallic inorganic particles which are gel forming and insoluble in water and polar organic liquids into the foam cells. A stable liquid suspension or gel, preferably aqueous is prepared using these particles. An opacifier such as finely divided titanium dioxide or tin oxide may also be added. An open cell foam product is placed in the gel until the cells fill with the gel. Excess gel is removed and the foam is dried, leaving the particles trapped in the cells. If desired, the foam may be post treated, such as by compression at the stabilizing temperature, resulting in a densified foam which further mechanically traps the particles and further improves the flame resistance.
    • 通过引入凝胶形成并且不溶于水和极性有机液体的细碎的非金属无机颗粒进入泡沫单体,提高泡沫的阻燃性,例如开孔聚酰亚胺泡沫的方法。 使用这些颗粒制备稳定的液体悬浮液或凝胶,优选水溶液。 还可以加入诸如细分二氧化钛或氧化锡的遮光剂。 将开细胞泡沫产物置于凝胶中,直到细胞充满凝胶。 除去过量的凝胶,干燥泡沫,留下细胞中的颗粒。 如果需要,泡沫可以进行后处理,例如通过在稳定温度下的压缩,导致致密的泡沫,其进一步机械地捕获颗粒并进一步提高阻燃性。