-
1.发明授权Electrical circuit protection devices comprising PTC conductive liquid crystal polymer compositions 失效包括PTC导电液晶聚合物组合物的电路保护装置
公开(公告)号：US5691689A
公开(公告)日：1997-11-25
申请号：US514201
申请日：1995-08-11
IPC分类号： C08G69/32 , C08G63/06 , C08G63/181 , C08G63/19 , C08G69/26 , C08G69/44 , H01C7/02 , H01C7/13 , H01G4/12 , H02H3/08 , H02H9/02 , H01C7/10
CPC分类号： H01C7/028 , H01C7/02 , H01G4/1227
摘要： Electrical circuit protection devices containing PTC elements comprised of conductive polymers which exhibit PTC behavior and are used to protect a load in an electrical circuit, in which the PTC conductive polymers are based on highly crystalline and highly ordered liquid crystal polymers and particulate conductive fillers dispersed therein, which are cross-linked by radiation. These circuit protection devices operate as automatically resettable current limiters and are particularly useful for protecting motors, solenoids, telephone lines and batteries, and for enhancing circuit interruption capability when used in conjunction with breakers and contactors. The liquid crystal polymers include aromatic polyesters, e.g., poly(p-phenylene terephthalate) and poly(p-hydroxybenzoate); aromatic copolyesters, e.g., poly(p-hydroxybenzoate-co-2,6-hydroxynaphthoate), poly(deca-methyleneterephthaloyl di-p-hydroxybenzoate, and poly(ethylene terephthalate-co-oxybenzoate); aromatic copolyester amides, e.g., poly(2,6-hydroxy-naphoate-phenoxyaminoterephthoate); aromatic polyamides, e.g., poly(p-phenylene terephthalamide), Kevlar, poly(p-benzamide), poly(2-chloro-1,4-phenylene terephthalamide), poly(p,p'-biphenylamide), and poly(2,6-napthalamide); aromaticpolyazomethines, e.g., poly (nitro-2-methyl-1,4-phenylenenitriloethylidine-1,4-phenylenethylidine), poly(nitrilo-2-methyl-1,4-phenylenenitrilomethylidine-1,4-phenylenemethylidine), and poly(nitrolo-2-chloro-1,4-phenylenenitrilomethylidine-1,4-phenylenemethylidine); and, blends thereof. The particulate conductive fillers include carbon black, carbon fibers, graphite, and metal flakes.
摘要翻译： 电路保护装置包含由导电聚合物组成的PTC元件，其表现为PTC行为并用于保护电路中的负载，其中PTC导电聚合物基于分散在其中的高度结晶和高度有序的液晶聚合物和颗粒状导电填料 ，它们通过辐射交联。 这些电路保护装置作为自动可复位限流器工作，特别适用于保护电动机，螺线管，电话线和电池，并在与断路器和接触器结合使用时增强电路中断能力。 液晶聚合物包括芳族聚酯，例如聚（对苯二甲酸对苯二甲酸酯）和聚（对羟基苯甲酸酯）; 芳族共聚酯，例如聚（对羟基苯甲酸酯 - 共-2,6-羟基萘甲酸酯），聚（对 - 亚甲基对苯二甲酰二对羟基苯甲酸酯和聚对苯二甲酸乙二醇酯 - 共 - 苯氧基苯甲酸酯）;芳族共聚酯酰胺，例如聚（ 聚对苯二甲酰对苯二甲酰胺），聚（对 - 苯甲酰胺），聚（2-氯-1,4-亚苯基对苯二甲酰胺），聚（对 - 苯甲酰胺） ，对联苯酰胺）和聚（2,6-萘二胺）;芳族多取氮甲基，例如聚（硝基-2-甲基-1,4-亚苯基三乙烯基-1,4-苯基亚乙基），聚（亚硝基-2-甲基 - 1,4-亚苯基亚乙基三亚甲基-1,4-亚苯基亚甲基）和聚（亚硝基-2-氯-1,4-亚苯基三亚甲基-1,4-亚苯基亚甲基）;及其混合物，颗粒状导电填料包括炭黑，碳纤维 ，石墨和金属薄片。
-
公开(公告)号：US06238790B1
公开(公告)日：2001-05-29
申请号：US09320202
申请日：1999-05-26
IPC分类号： B32B1500
CPC分类号： H02K3/30 , H01B3/40 , H01B3/421 , H01B3/441 , Y10T428/2927 , Y10T428/2933 , Y10T428/294
摘要： An electrically conducting member (2) is insulated with a thin coating (6) of a resinous insulation composition containing a resin interactive with and bonded to an oligomer containing a metal of at least one of Cr, Sn and Zn, where the oligomer is within a silicate type mica or clay structure.
摘要翻译： 导电构件（2）用包含树脂绝缘组合物的薄涂层（6）绝缘，所述树脂绝缘组合物包含与包含Cr，Sn和Zn中的至少一种的金属的低聚物相互作用并结合的树脂，其中低聚物在 硅酸盐型云母或粘土结构。
-
公开(公告)号：US6103382A
公开(公告)日：2000-08-15
申请号：US818483
申请日：1997-03-14
CPC分类号： H02K3/30 , H01B3/04 , H01B3/40 , Y10T428/251 , Y10T428/2911 , Y10T428/2936
摘要： A catalyzed mica tape used in insulating electrical conducting devices is made from a mica paper bonded to a backing with a bonding resin. The bonding resin is cross-linkable by an addition reaction. The catalyzed mica tape has distributed therein at least a catalyst at a concentration of greater than 0.01 g/m.sup.2 for every 100 g/m.sup.2 of the bonding resin. The catalyst is an organo-transition metal compound, organo-tin compound, or a combination thereof.
摘要翻译： 用于绝缘导电装置的催化云母带由用粘合树脂粘合到背衬上的云母纸制成。 粘合树脂通过加成反应可交联。 对于每100g / m2的粘合树脂，催化云母带至少分布有浓度大于0.01g / m 2的催化剂。 催化剂是有机过渡金属化合物，有机锡化合物或其组合。
-
4.发明授权
公开(公告)号：US5968419A
公开(公告)日：1999-10-19
申请号：US986889
申请日：1997-12-08
摘要： The present invention is directed to conductive polymer composition that have positive temperature coefficients, electrical devices comprised thereof and methods of making the same. The composition comprises a thermoset polymer matrix containing discretely distributed thermoplastic material and dispersed conductive material. Preferably, the thermoset and thermoplastic polymers are substantially immiscible and have comparable volume transition temperatures, such as bisphenol A liquid epoxy resins and oxidized polyethylene.
摘要翻译： 本发明涉及具有正温度系数的导电聚合物组合物，由其组成的电气装置及其制造方法。 组合物包含含有离散分布的热塑性材料和分散的导电材料的热固性聚合物基质。 优选地，热固性和热塑性聚合物基本上是不混溶的并且具有相当的体积转变温度，例如双酚A液体环氧树脂和氧化聚乙烯。
-
5.发明授权Electrically conductive prepreg for suppressing corona discharge in high voltage devices 失效用于抑制高压设备电晕放电的导电预浸料
公开(公告)号：US5633477A
公开(公告)日：1997-05-27
申请号：US242817
申请日：1994-05-16
摘要： A resin-rich electrically conductive felt material is described. The described conductive felt can be used to suppress corona discharge in high voltage generator coils. The conductive felt is prepared by treatment with electrically conducting polymers, such as polyaniline and polypyrrole, and resistivity values ranging from 4,000 to 100,000 ohms may be obtained. This treated felt can be readily impregnated with thermoset resins, such as epoxies, to provide flexible prepregs suitable for coil bonding applications in turbine generators.
摘要翻译： 描述了一种富含树脂的导电毡材料。 所描述的导电毡可用于抑制高压发生器线圈中的电晕放电。 通过用导电聚合物如聚苯胺和聚吡咯处理来制备导电毡，并且可以获得范围从4,000至100,000欧姆的电阻率值。 该经处理的毡可以容易地用热固性树脂例如环氧树脂浸渍，以提供适用于涡轮发电机中的线圈接合应用的柔性预浸料。
-
6.发明授权
公开(公告)号：US5581192A
公开(公告)日：1996-12-03
申请号：US350299
申请日：1994-12-06
CPC分类号： H01H29/06 , H01H29/004 , H01H33/162 , H01H71/24
摘要： Novel conductive liquid compositions which have low resistivity when carrying an applied steady-state current (I.sub.Steady-State) but exhibit sharp increases in resistivity when subject to an applied fault current (I.sub.Fault). When used in circuit protection devices, the novel conductive liquid compositions having low resistivity are contained within an elongated flexible tube sealed by electrodes electrically connected to a load of an electrical circuit. The conductive liquid compositions carry an applied normal current under steady-state conditions. The flexible tube is deformed by radial contraction transverse to the direction of current flow and axial expansion, when an excessive current of fault magnitude is sensed by an actuator electrically connected to the electrodes and mechanically connected to the flexible tube to apply a deformation force on the tube, thereby causing the current path of the conductive liquid compositions to have high resistivity in order to limit the let through current to a safe value (I.sub.Limited). When the excessive current is removed, the deformation is correspondingly removed and the conductive liquid composition automatically reverts back to its original low resistivity state. The invention has specific applications as automatically resettable fuses or current limiters.
摘要翻译： 新型导电液体组合物在承载施加的稳态电流（ISteady-State）时具有低电阻率，但在受到施加的故障电流（IFault）时呈现电阻率的急剧增加。 当用于电路保护装置时，具有低电阻率的新型导电液体组合物被包含在由电连接到电路的负载的电极密封的细长柔性管中。 导电液体组合物在稳态条件下携带施加的正常电流。 柔性管通过横向于电流和轴向膨胀方向的径向收缩而变形，当故障幅度的过大电流被电连接到电极的致动器感测并机械地连接到柔性管以在其上施加变形力时 从而导致导电液体组合物的电流路径具有高电阻率，以便将通过电流限制到安全值（ILimited）。 当去除过大的电流时，相应地去除变形，并且导电液体组合物自动地回复到其原始的低电阻率状态。 本发明具有可自动复位的保险丝或电流限制器的具体应用。
-
公开(公告)号：US06193904B1
公开(公告)日：2001-02-27
申请号：US09041220
申请日：1998-03-12
IPC分类号： C01G102
CPC分类号： C01G49/009 , C01P2002/30 , C01P2002/88 , C01P2004/03 , C01P2006/60 , C04B35/26 , H01F1/344
摘要： Methods of preparing ferrite powders for use in microwave elements such as isolators, circulators, phase shifters and transmission line elements. In one method separate precipitations of metal dicarboxylate salts such as oxalates or malonates are mixed with a ferrous dicarboxylate. This is followed by mixing and calcining of the precipitated dicarboxylates to form the ferrite powder. In another method metal acetates in a solution of concentrated acetic acidare mixed with iron powder to form a solution which is mixed with malonic acid. The resulting mixed metal malonates are processed into a powder which is calcined to obtain the ferrite. To form a lithium ferrite, lithium carbonate is added to prepared powders prior to the calcining step.
摘要翻译： 制备用于微波元件（如隔离器，循环器，移相器和传输线元件）的铁氧体粉末的方法。 在一种方法中，将金属二羧酸盐如草酸盐或丙二酸盐的分离的沉淀物与二羧酸亚铁混合。 然后将沉淀的二羧酸盐混合并煅烧以形成铁氧体粉末。 在另一种方法中，将浓缩乙酸溶液中的乙酸乙酯与铁粉混合以形成与丙二酸混合的溶液。 将得到的混合金属丙二酸酯加工成粉末，煅烧得到铁素体。 为了形成锂铁氧体，在煅烧步骤之前将碳酸锂加入到制备的粉末中。
-
8.发明授权
公开(公告)号：US5471185A
公开(公告)日：1995-11-28
申请号：US350291
申请日：1994-12-06
CPC分类号： H01H29/06 , H01H29/004 , H01H71/24
摘要： The invention provides an electrical circuit protection device using a conductive liquid contained in a flexible tube contacted and sealed at each end by an annular metal electrode capped by a flexible membrane. The flexible tube is further sealed inside a solid insulating tube which contains a ferromagnetic liquid. The ferromagnetic liquid surrounds the flexible tube and remains in intimate contact with the outside of the flexible tube and is connected to a load sensing element which generates a magnetic field in the ferromagnetic fluid in response to excessive currents applied in the current path through the conductive liquid between the electrodes. This assembly is contained inside a tubular resistor. Under normal current conditions, a current flows through the conductive liquid which has relatively low resistivity. Upon a fault condition, a self generated magnetic field from the fault current causes the ferromagnetic fluid to rapidly constrict and pinch off current flow in the conductive liquid by constricting the current path in the liquid through deformation of the flexible capsule, i.e., by radial contraction and axial expansion. The current is then preferably commutated to the cylindrical resistor to limit the let through current to a safe value. Once the fault is limited, the magnetic field is dissipated and the flexible membranes force the conductive liquid and ferromagnetic fluid back to its their original position and the conductive liquid accordingly automatically reverts back to low resistivity for normal current conduction.
摘要翻译： 本发明提供了一种电路保护装置，其使用包含在柔性管中的导电液体，每个端部由柔性膜覆盖的环形金属电极接触和密封。 柔性管进一步密封在含有铁磁性液体的固体绝缘管内。 铁磁液体围绕柔性管并且保持与柔性管的外部紧密接触并且连接到负载感测元件，该负载感测元件响应于在电流路径中施加的过大电流而在铁磁流体中产生磁场，该电流通过导电液体 在电极之间。 该组件包含在管状电阻器内。 在正常电流条件下，电流流过具有较低电阻率的导电液体。 在故障状态下，来自故障电流的自产生的磁场使得铁磁性流体通过使柔性胶囊的变形（即通过径向收缩）收缩液体中的电流路径，迅速收缩并夹紧导电液体中的电流 和轴向膨胀。 然后，电流优选地换向圆柱形电阻器，以将通过电流限制到安全值。 一旦故障受到限制，磁场就会消散，柔性膜会迫使导电液体和铁磁性流体回到其原始位置，导电液体会自动回复到低电阻，以保持正常的电流传导。
-
9.发明授权Process for making a positive temperature coefficient conductive polymer from a thermosetting epoxy resin and conductive fillers 有权从热固性环氧树脂和导电填料制造正温度系数导电聚合物的方法公开(公告)号：US06375867B1
公开(公告)日：2002-04-23
申请号：US09543469
申请日：2000-04-05
IPC分类号： C08L6300
摘要： A process for making an improved current limiting composition comprising mixing an epoxy thermosetting resin containing more than one 1,2 epoxy groups per molecule with an acid anhydride curing agent, an epoxy reactive diluent, first and second co-accelerators and conductive additive particles to form a liquid mixture. The liquid mixture is heated at a first temperature range below gelation temperature while drawing a vacuum to drive off volatiles and gases. Continued heating at a second temperature range promotes gelation and heating a third temperature range effects a final cure. A first co-accelerator becomes effective during the gelation temperature range and a second co-accelerator does not become effective until the final cure temperature range. Gelation takes about 2 to 4 hours at about 130° C. to 140° C. and final cure takes about 13 to 18 hours at about 140° C. to 160° C. The epoxy resin is preferably a diglycidyl ether of bisphenol A, the epoxy reactive diluent is preferably a diglycidyl ether of neopentyl glycol, the acid anhydride hardener is preferably 1-methyl tetrahydrophthalic anhydride and the conductive additive particles are selected from the group consisting of carbon black, nickel fiber, nickel flake, nickel beads and copper flake. An effective amount of said alumina trihydrate is employed in the mixture to prevent dielectric breakdown, arcing and carbon tracking under high voltage conditions in current limiting compositions. The first co-accelerator is 1-methyl imidazole and the second co-accelerator is chromium acetylacetonate.
摘要翻译： 一种制备改进的限流组合物的方法，包括将每分子含有多于一个1,2-环氧基的环氧热固性树脂与酸酐固化剂，环氧反应性稀释剂，第一和第二共同加速剂和导电添加剂颗粒混合以形成 液体混合物。 将液体混合物在低于凝胶化温度的第一温度范围内加热，同时抽真空以驱除挥发物和气体。 继续加热在第二温度范围促进凝胶化和加热第三温度范围实现最终固化。 第一共同促进剂在凝胶化温度范围内变得有效，而第二共促进剂直到最终固化温度范围才有效。 胶凝在约130℃至140℃下需要约2至4小时，最终固化在约140℃至160℃下约13至18小时。环氧树脂优选为双酚A的二缩水甘油醚， 环氧反应性稀释剂优选为新戊二醇的二缩水甘油醚，酸酐硬化剂优选为1-甲基四氢邻苯二甲酸酐，导电性添加剂粒子选自碳黑，镍纤维，镍片，镍珠，铜片 。 在混合物中使用有效量的所述三水合氧化铝以防止在限流组合物中的高电压条件下的电介质击穿，起弧和碳追踪。 第一共同促进剂是1-甲基咪唑，第二共促进剂是乙酰丙酮铬。
-
公开(公告)号：US5904984A
公开(公告)日：1999-05-18
申请号：US734375
申请日：1996-10-17
CPC分类号： C09K19/388 , C08G59/22 , H01B3/40 , Y10T428/2971 , Y10T428/31525
摘要： Liquid crystal thermoset epoxy resin is used as an electrical insulator on electrical conducting devices such as coils and transformers. The linear epoxy/mesogen/epoxy molecule of the liquid crystal thermoset epoxy resin results in a electrical insulator with a high degree of crystallinity. This results in an electrical insulator with mechanical and electrical properties suitable for use in high temperature, high stress environments.
摘要翻译： 液晶热固性环氧树脂用作诸如线圈和变压器的导电装置上的电绝缘体。 液晶热固性环氧树脂的线性环氧/介晶/环氧分子产生具有高结晶度的电绝缘体。 这导致具有适于在高温，高应力环境中使用的机械和电气性质的电绝缘体。
-
-
-
-
-
-
-
-
-
搜索结果
20 条记录 (耗时 0.027 秒)
