A high temperature, flame resistant polyimide foam material and methods of making open and closed cell, rigid and flexible foams from common precursors. An aromatic tetracarboxylic dianhydride is reacted with an amino acid and an alcohol or mixture of alcohols to produce an N-substituted imido acid ester. The product is then reacted with an aromatic diamine. The resulting liquid is dri

A method for the production of polyolefin resins containing both an organic amide and a zinc compound. One composition is prepared which contains the polyolefin and the amide, but which does not contain the zinc compound. Another composition is prepared which contains the polyolefin and the zinc compound, but which does not contain the amide. The two compositions are extruded separately, and the i...

This invention describes a method of producing a silicone elastomer from an emulsion. When the ingredients are mixed together, the resulting latex can be used immediately. Removing the water from the latex results in a silicone elastomer. The method combines (A) an anionically stabilized, hydroxyl endblocked polydiorganosiloxane, present as an emulsion of dispersed particles in water, the emulsion...

High strength and modulus articles, such as filaments, fibers, tapes, films, tubes, bars or profiles, are prepared by irradiating a solid, particular, lamellar, disentangled polyethylene with a Mw>4x105, transforming this polyethylene above the melt temperature into an article, cooling said article to below the melting point and stretching it in several steps at rising temperature but below the me...

A change-speed transmission for a motor vehicle which includes as input shafts a central shaft supported in an intermediate plate of the transmission housing and a hollow shaft supported on the central shaft near the intermediate plate. An output shaft for the axle drive is supported in the transmission housing parallelly to the input shafts. The transmission housing is constructed two-partite or ...

Liquid bitumen at a temperature of 120 - 160C is mixed with 1-3% by weight of water in a mixing device (8) at a pressure which is higher than the saturation pressure of water vapor at the temperature of the hot bitumen. From the mixing device the mixture is allowed to expand through a valve (10) such as a throttle valve, the resulting evaporation of the water in the mixture causing the desired ...

Synthesis gas is produced from solid fuels, using endothermally (32 to 38) and exothermally (40 to 47) reacting gasifying agents, in a reactor (10) with a fluidised bed (14), a post-reaction chamber (18) located above and a fixed bed (20) located below. The rate at which the solid gasification residues forming the fixed bed (20) are taken off from the reactor (10) is controlled as a function of th...

Films comprising alpha-olefin polymers, such as polypropylene consisting essentially of recurring propylene units and having a substantial crystalline polypropylene content, and in particular isotactic polypropylene, are rendered low adhesive to the welding bars of automatic and semi-automatic machines conventionally used for the manufacture of containers, evelops, bags, vessels and, in general, o...

METHOD AND APPARATUS FOR BOREHOLE FLUID INFLUX DETECTION The infusion of fluid from the formation being drilled into a borehole is detected by modulating the drilling fluid stream in the drill pipe and detecting pressure variations commensurate with the modulation at the surface in the annulus between the drill pipe and wall of the well. The detected pressure variations are compared in phase and/o...

Docket No. A-8107 Paper No. 1 A PROCESS FOR PREPARING AN AQUEOUS ADHESIVE COMPOSITION A process for preparing an aqueous adhesive composition which comprises preparing a solvent dispersion by mixing rubber, carbon black, vulcanizing agent, tackifying resin and accelerator with sufficient organic solvent to form a solvent dispersion and -thereafter emulsifying the solvent dispersion in the presence...

LOW DENSITY SILICONE FOAM COMPOSITION AND METHOD FOR MAKING A method of reducing the density of a silicone foam is provided comprising mixing with a foamable silicone composition having a base polydiorganosiloxane, an effective amount of a resinous copolymer selected from the group consisting of resinous copolymers of R3SiO0.5 units and SiO2 units, and ratio of R3SiO0.5 units ranging from 0.25 to ...

Hydrocarbon fuels, especially diesel fuel compositions, contain cyclic aldehyde polymers and orthoesters to reduce particulate emissions therefrom when combusted in an internal combustion engine.

A fuel composition containing an acid anhydride as an anti-knock additive.

A gypsum composition for denture investment comprises 100 parts by weight of a mixture of 50-90 parts by weight of alpha -Gypsum hemihydrate ( alpha -CaSO4.1/2H2O) with 10-50 parts by weight of beta -Gypsum hemihydrate ( beta -CaSO4.1/2H2O) and 0.2-2.0 parts by weight of a soluble potassium salt and 0.5-3.0 parts by weight of mannitol. As the soluble potassium salt, use may be made of one or more...

A dental cement composition consisting of a composition A and a composition B, said composition A comprising at least two powders, (a) 100 parts by weight of a powder containing more than 20% by weight to 70% by weight of calcium oxide and 30% by weight to less than 80% by weight of aluminium oxide and treated on the surface with 0.01 to 5% by weight of at least one selected from the group consist...

An electroluminescent device wherein a light-emitting layer is formed between electrode layers, and a selenium layer is formed between the light-emitting layer and at least one of the electrode layers. Each of the crystals in the selenium layer grows in a columnar shape in the direction extending at right angles to the light-emitting layer.

An inductive magnetic field article surveillance system includes a generator for a first magnetic field. Articles to be monitored include a structure responsive to the first magnetic field for deriving a second inductive magnetic field having a predetermined frequency. An inductive magnetic field receiver responsive to the second magnetic field includes a receiver coil arrangement for deriving a s...

An article control system has an encoded marker associated with an article appointed for passage through an interrogation zone. The marker resonates upon interrogation to provide a signal which is detected and compared against a code list containing at least one predefined code. A signal generated upon verification of parity between marker resonance and the predefined code triggers an alarm or act...

M.A.N. Maschinenfabrik Augsbura-N?rnberg Aktiengeselischaft N?rnberg, December 20, 1983 A B S T R A C T ============================= Instead of teeth or similar cutting or loosening means, oscillating nozzles are arranged on the outer back and the outer side walls of the buckets of the bucketwheel of a bucketwheel excavator, said nozzles being capable of being supplied with liquid, in particular ...

An electric shaver comprising a housing, a fixed cutter installed in the housing, a moving cutter, a driving motor for driving said moving cutter, a power supply circuit of said driving motor, a starting switch provided in said supply circuit, and a knob for operating said starting switch, said power supply circuit further comprising a circuit for changing the voltage applied to said driving motor...