Abstract: The present invention relates to a process for the manufacture of foamed or non-foamed compositions, in which one or more organic or inorganic compounds containing at least two isocyanate groups is or are reacted in the presence of an alkaline aqueous solution, an alkaline aqueous suspension or an alkaline aqueous slurry of an alkali metal hydroxide and/or alkaline earth metal hydroxide, and of one or more catalysts and, optionally, inert fillers and/or, optionally, one or more volatile substances as blowing agents. According to the invention, a mixture of the compound or compounds containing the isocyanate groups and the alkali metal hydroxide or oxide and/or alkaline earth metal hydroxide or oxide is added to a mixture of water and catalyst. The oxide employed is preferably calcium oxide.

Abstract: This invention relates to a feed system for introducing water in the liquid and/or vaporous state into the suction path of an internal combustion engine, consisting of a water stock vessel, of a heat exchanger, to one side of which exhaust gases from the internal combustion engine can be admitted and to the other side of which the water can be admitted, and of the heat barrier upstream of the heat exchanger, which comprises a metering device for metering the quantity of water, which is to be fed into the suction path, and a control device which controls the metering device as a function of at least one operating parameter of the internal combustion engine.

Abstract: A method of producing electrically conductive plastics materials from polymers and electrically conductive particles wherein an aqueous dispersion of polyacrylate, such as a thermally cross-linkable copolymer based upon ethyl acrylate, or a polyisobutylene is mixed with an aqueous dispersion of electrically conductive particles such as noble metals, non-metallic materials coated with noble metals, or carbon, and the resulting mixture is spread out in a thin layer on a support, whereafter the water is evaporated at a temperature above the softening of the plastics material.

Abstract: A process of producing a porous polyurethane resin filter material. A first solution containing an NCO-adduct dissolved in a highly polar organic solvent is admixed into a second solution containing a highly polar organic solvent and at least one hydrazine hydrate, carbodihydrazide, piperazine and 1,4-diaminopiperazine. The first solution is admixed into the second solution over an extended period of time during which time the viscosity of the admixture is monitored and during which time the NCO pre-adduct and the hydrazine (or the like) react to form a polyurethane reaction product. During this time, the viscosity of the admixture increases. Admixture is continued with monitoring of the viscosity of the admixture until a point is reached at which the addition of even the minutest amount of the first solution into the admixture would result in instantaneous gelling thereof. At this point, the solids content of the final admixture is between 15 and 35% by weight.

Abstract: This invention relates to electrically conductive foam moulding manufactures from electrically conductive polystyrene beads containing blowing agent.

Abstract: An organic-inorganic polymer for both porous and non-porous plastic products is produced by reacting a borate, in an aqueous alkaline solution, with a poly functional isocyanate.

Abstract: This invention relates to filter material consisting substantially of a microporous and/or macroporous sheet structure obtained by coagulation of a polymer solution in which at least one surface area of the sheet structure is abraded more or less, depending on the desired pore size and a process for producing said filter materials.

Abstract: This invention relates to a process for preparing organosilicate polymers by reaction of a water glass solution with a compound having at least two isocyanate groups. The reaction is carried out in the presence of a zwitterion compound acting as catalyst and optionally in the presence of propellants and/or water glass hardening agents, the zwitterion compound having in the molecule at least one group with positive charge, at least one group with negative charge, and additionally at least one hydrogen atom with Zerewitinov activity.

Abstract: This invention relates to a process for the manufacture of foams based on phenolic resins, wherein phenolic resins are reacted, in the presence of metal powders and/or metal oxide powders, with organic diisocyanates and/or polyisocyanates.

Abstract: This invention relates to a process for the manufacture of an organo-metallate polymere which comprises reacting in a liquid phase a metallate with a pseudohalide compound and/or other polymerizable compound and allowing the reaction to proceed to completion.

Abstract: This invention relates to a process for producing crosslinked elastomeric shaped polyurethane structures from crosslinked polyurethanes dissolved in solvents produced by the combination of the following steps:1. preparation of an NCO pre-adduct in a non-critical NCO/OH proportion from a treated polyol and the corresponding diisocyanate in a highly polar solvent;2. preparation of a solution containing crosslinked polyurethanes by introducing into the polymerization vessel a chain propagating and/or chain crosslinking agent and/or a combination thereof, and stirring into said vessel the NCO pre-adduct solution from step 1 such that the viscosity becomes an indication of the degree of the instantaneously occurring chain propagation and chain crosslinking reactions. In this way a solution is obtained which is at the borderline state between solution and gel and in which highly crosslinked polymer portions are uniformly distributed;3. molding;4. removal of the solvent by evaporation.

Abstract: This invention relates to a non-flammable homogeneous or foamed organo-red mud polymers, which essentially comprise the reaction product of red mud and a compound possessing at least two isocyanate groups.

Abstract: The generator produces a pulse train with a given pulse duty factor and a relatively small pulse width, and comprises an oscillator including a resonance circuit having multiple frequencies and tuned to the fundamental frequency corresponding to the pulse repetition rate and to at least the first and second harmonics of the fundamental frequency. On the output side, there is generated a sawtooth wave with a steep leading edge having an inflexion point. Differentiation members couple the resonance circuit to a load so that, as a result of matched differentiation of the steep leading edge of each sawtooth of the wave, a pulse, having a pulse width corresponding approximately to the pulse time of the leading edge, acts on the load.

Abstract: This invention relates to a process for producing finished and/or irreversibly embossed microporous sheet structures by coagulation of a polyurethane solution, in which prior to the coagulation of the polyurethane solution a finishing agent is mixed into it or a finishing agent is applied to the free surface of the polyurethane solution which has been spread out flat and embossing is then carried out during or shortly after the coagulation or after the washing, but still before the drying, or else the microporous sheet structure obtained and into which the finishing agent has been mixed previously is, after drying, pressed between two plates or passed under pressure between at least two oppositely rotating rolls, at least one of which is highly polished.