Abstract: Disclosed are electrorheological (ER) fluids which display improved stability against sedimentation, reduced current density and good ER responses. Thes=e ER fluids are prepared from monomers which are polymerized by dispersion polymerization in a low conductivity medium which also serves as the dispersion medium for the fluid. The ER fluids are further processed by modifying the polymer particles through polymerization of a hydrophilic monomer to form a hydrophilic shell or globule around the particles followed by neutralization through addition of an organic soluble base. The resulting dispersion is then doped with water to obtain a stable ER fluid. The hydrophilic shell or globule constitutes about 15% of the particle. Water dopant is only absorbed by the hydrophilic portion of the particle and does not enter into the core of the particle. The quantity of water is significantly reduced, which in turn results in a significant reduction of the current density at any given comparative voltage.

Abstract: A rheological fluid composition which is responsive to a magnetic field. The composition comprises magnetizable particulate, silica gel as a dispersant and a vehicle. A preferred magnetizable particulate is insulated, reduced carbonyl iron.

Abstract: Disclosed are electrorheological (ER) fluids which display improved stability against sedimentation, reduced current density and good electrorheological response. These ER fluids are prepared from monomers which are polymerized by dispersion polymerization in a low conductivity medium which in most embodiments of the invention serves as the dispersion medium for the fluid. the ER fluids are further processed by modifying the polymer particles through polymerization of a hydrophilic monomer to form a hydrophilic shell or globule around the particles. The resulting dispersion is then doped with water to obtain a stable ER fluid. The hydrophilic shell or globule constitutes a minor part of the particle. Water dopant is only absorbed by the hydrophilic portion of the particle and does not enter into the core of the particle. The quantity of water is significantly reduced, which in turn results in a significant reduction of the current density at any given applied field strength.

Abstract: An electro-rheological fluid comprising a hydrophilic solid and a hydrophobic liquid component wherein the hydrophobic liquid component comprises a fluorosilicone whose average molecular weight is in the range 200-700.

Abstract: Silicone fluid-based electric insulation oils can be imparted with greatly enhanced flame retardancy when the base organopolysiloxane contains 0.1 to 30% by moles of vinyl groups relative to the monovalent hydrocarbon groups bonded to the silicone atoms and is admixed with a platinum compound soluble therein, such as chloroplatinic acid, dissolved thereiin in a specified amount. The flame retardancy of the organopolysiloxane/platinum compound composition can be further improved by the addition of a low-viscosity fluorinated hydrocarbon oil such as an oligomeric polymer of chlorotrifluoroethylene.

Abstract: A gelled dielectric encapsulant material and process therefor for use in reenterable and nonreenterable communication cable splices as well as applications relating to encapsulation of electronic components comprises a plasticizer which does not stress crack polycarbonate, an aliphatic or aromatic carboxylic acid, and a basic oxide or hydroxide.

Abstract: An improved electric field dependent fluid and method of preparing the same for use at temperatures in excess of 100.degree. C. (typically 120.degree. C.) without releasing water comprising: a nonconductive liquid phase; and a dispersed particulate crystalline zeolite phase (e.g., M.sub.(x/n) [AlO.sub.2).sub.x (SiO.sub.2).sub.y ] wH.sub.2 O where M is a metal cation or mixture of metal cations of average valence charge n, x and y are integers and the ratio of y to x is from about 1 to about 5, and w is a variable). Such field dependent fluids are particularly useful in automotive and/or other high temperatures applications.

Abstract: An improved insulating material is provided. The insulating material is a mixture of an insulating fluid and solid insulative bodies. The insulating material exhibits desirable insulating, conformal coating, surface adhesion, and low-viscosity characteristics. For example, when the insulating material is used to fill the cavity of a hollow insulator, the insulating material prevents any moisture that enters the insulator from adhering to the walls that define the cavity; thus maintaining the insulating qualities of the insulator. In the event that some of the fluid is lost through leakage, the insulating material also aids in preserving the insulating qualities of the insulator.

Abstract: An electrorheological fluid which comprises a liquid continuous phase and, dispersed therein, at least one dispersed phase and which is capable of functioning as such when at least the dispersed phase is substantially anhydrous.

Abstract: A method for manufacturing dielectric metal titanate MTiO.sub.3 where M represents Ba and Sr is disclosed, which comprises the steps of preparing aqueous alkaline solution containing at least one metal salt selected from the group of barium and strontium and immersing metal titanium into the solution to form the metal titanate MTiO.sub.3 where M is at least one of barium and strontium.Further, there is disclosed a method for manufacturing dielectric metal titanate MTiO.sub.3 where M represents Ba and/or Sr which comprises the steps of preparing aqueous solution containing at least one metal salt selected from the group of barium and strontium, forming a metal titanium layer on a substrate, and immersing the substrate with the metal titanium layer into the solution to convert the metal titanium layer into the dielectric metal titanate MTiO.sub.3 where M is at least one of barium and strontium.

Abstract: A composition for forming a densified dielectric body at low firing temperatures comprising a mixture of particles consisting essentially of(a) 95.5-99.4% finely divided wt. of a mixture of metal oxides, metal oxide precursors or polynary oxide reaction products thereof in molar proportions corresponding to the formula(Sr.sub.x Pb.sub.1-x TiO.sub.3).sub.a (PbMg.sub.r W.sub.s O.sub.3).sub.b,and(b) 4.5-0.6% wt. of a mixture of metal oxides or precursors thereof consisting essentially of (1) a binary oxide of a transition metal selected from the group consisting of Co, Ni, Cr, Mn and mixtures thereof, (2) Cd titanate, Zn titanate or mixtures thereof, and (3) a polynary oxide selected from the group consisting of Cd zirconate, Zn zirconate, Cd stannate, Zn stannate and mixtures thereof.

Abstract: An oil-impregnated capacitor produced by infiltrating a liquid impregnant containing at least one organometallic compound, represented by organic silane compounds, having a hydrolyzable group represented by alkoxy groups and acyloxy group and an organic functional group represented by vinyl group, epoxy group, mercapto group, methacrylo group, chlorine atom and peroxide group. It shows good characteristics when used under high stress conditions, in particular, at a high temperature and a high voltage.

Abstract: A method and composition for effecting splices of high voltage cable sections for use with a mold placed around the cable sections. The composition comprises a liquid polyolefin, a finely divided solid polyolefin and a chain extension agent capable of reacting to form addition polymer linkages with the liquid polyolefin.

Abstract: A hydrophobic gel composition comprises an aluminium stearate, liquid paraffin and polyisobutylene. The gels are prepared by first blending together aluminium stearate and liquid paraffin. The mix is then heated to 180.degree.-200.degree. C. and a quantity of polybutylene preheated to 150.degree. C. is added, after which the composition is allowed to cool slowly to ambient temperature. The compositions are particularly useful in electrical connectors.

Abstract: A method of reducing electromagnetic re-radiation of harmonic and intermodulation products by metal structures, having at least two adjoining elements, in response to an incident electromagnetic signal (rusty bolt effect). The method comprises the application between the adjoining elements of the structure, at their junction, of a layer of a non-water soluble substance having a dielectric constant greater than 10.

Abstract: A stable liquid composition which comprises a colloidal dispersion of finely-divided particles in a liquid silicone-oil carrier and a dispersing amount of a surfactant, which surfactant comprises a silicone-oil surfactant containing a functional group which forms a chemical bond with the surface of the particles and a tail group which is soluble in the silicone-oil carrier, to provide a stable ferrofluid composition.