Abstract: The present invention concerns microcapsules comprising a capsule core and a capsule wall composed of thermoset polymer and also, disposed on the outer surface of the capsule wall, a polyelectrolyte having an average molecular weight in the range from 500 g/mol to 10 million g/mol, and also a process for their production and their use in bindered building materials, textiles, heat transfer fluids and dumped beds.

Abstract: The present invention concerns microcapsules comprising a capsule core and a capsule wall composed of thermoset polymer and also, disposed on the outer surface of the capsule wall, a polyelectrolyte having an average molecular weight in the range from 500 g/mol to 10 million g/mol, and also a process for their production and their use in bindered building materials, textiles, heat transfer fluids and dumped beds.

Abstract: Insecticide composition for application to a textile material or plastics material selected from the group consisting of yarn, fibers, fabric, knitgoods, nonwovens, netting material, foils, tarpaulins and coating compositions, which insecticide composition comprises a mixture including at least one insecticide and/or at least one repellent, and at least one binder; an impregnated textile material or plastics material comprising at least one insecticide and/or at least one repellent, and at least one binder; processes for impregnation of a textile material or plastics material and a process for coating of a textile material or plastics material.

Abstract: Insecticide composition for application to a textile material or plastics material selected from the group consisting of fibers, fabric, knitgoods, nonwovens, netting material, foils, and tarpaulins, which composition comprises a mixture including at least one insecticide and/or at least one repellent, and at least one binder; an impregnated textile material or plastics material comprising at least one insecticide and/or at least one repellent, and at least one binder; processes for impregnation of a textile material or plastics material and a process for coating of a textile material or plastics material.

Abstract: A dimensionally stable, flow-porous fluid treatment element suitable for hot fluid treatment, in particular a filter element, characterized by the following components: (a) inorganic solid particles with inner voids; and (b) hardened binder on a water glass base, (c) the binder holding together the solid particles to form the flow-porous fluid treatment element.

Abstract: A method for redeveloping or renovating sewer conduits and sewer ducts, with which a large amount of scrap rubber can be used. Tube of low inherent stability are produced from scrap rubber and plastic material. These tubes are introduced into old sewer pipes of the sewer ducts, the tube of low inherent stability being supported by the wall of the old sewer pipe.

Abstract: The invention relates to a thermoplastic casting material, especially a thermoplastic casting material for orthopedic and other medical applications for immobilization of extremities and/or joints, that comprise a first textile fabric, a thermoplastic polymer applied to the first textile fabric and at least one second textile fabric applied to this composite. Additionally, the invention relates to a method for the production of this thermoplastic casting material that comprises the following steps: a) application of a thermoplastic polymer on a first textile fabric and b) application of at least one second textile fabric on the first textile fabric from step a) provided with the thermoplastic polymer.

Abstract: For measuring the tread depth of the tyre of a motor vehicle by means of a measuring head containing a laser (67), the laser measuring head is positioned relative to the tyre of the motor vehicle in such a way, that a reference surface or plane adopts a well-defined position with respect to the tyre. The laser beam (66) of the laser (67) is directed through the reference surface (68) at an angle (.alpha.) to the bottom (64) of the tyre tread, whereby a light spot (78) is generated on this bottom (64) of the tyre tread. The position (e) of the light spot (78) is observed by an image resolving sensor (82). Therefrom, a measure (t) of the depth of the tyre tread is gained.

Abstract: For certain applications, such as detecting of glass breakage, it is advantageous to use frequency-selective ultrasonic transducers. In this case, one can dispense with using costly filter configurations to filter out relevant frequency components of the received ultrasonic spectrum. An ultrasonic sandwich transducer, which shows a high sensitivity for certain predetermined frequencies, can be produced by selectively adapting at least one of its geometric dimensions to the frequency selectivity which is required of the transducer. The ultrasonic sandwich transducer preferably has a piezoelectric-ceramic wafer, which is surrounded on at least one of its two wafer surfaces by a layer of low acoustical impedance. The piezoelectric-ceramic wafer is effectively rectangular, resulting in a block-shaped member. One of the dimensions of height, length and width is fixed to correspond to a desired fundamental frequency.

Abstract: A method for producing an ultrasound transformer as a single integral unit that includes a piezoelectric transformer element coupled to an acoustical matching layer formed from an elastomer capable of vibrating. The method includes the steps of: producing an elastomer body from a molded part which has centering contours; positioning the transformer element into the elastomer body; centering the transformer element with the centering contours; and, coupling the transformer element to the matching layer.

Abstract: In an ultrasonic sandwich transducer having an astigmatic sonic lobe, a small rectangular piezoceramic plate is operated on the fourth planar vibrational mode. To prevent the creation of secondary lobes that lead to spurious signals, damping elements are applied to the longitudinal ends of the ultrasonic sandwich transducer. These types of ultrasonic sandwich transducers find application, in ultrasonic proximity switches.

Abstract: A method of sealing cavities open on one side, preferably cavities of electrical equipment housings fitted with various components. A measured quantity of an encapsulant, preferably polyurethane foam, is inserted into the cavity. Thereafter the opening is covered by a permeable, absorbent fabric, preferably of polypropylene, which is covered first by an elastic and then a rigid layer. After hardening, the fabric is removed from the surface of the encapsulant.