Tech Exchange

Viscosity Thickeners for Adhesive Polymer

A client uses sodium and potassium stearates to build body and viscosity in a polymer dispersion intended as an adhesive. The stearates adversely affect shear strength after the dispersion cures. Non-stearate thickeners, or different stearates, are needed. By varying the nature of the fillers and thickeners, and possibly by varying their loading, post-cure compression shear strength of 2000-2500 pounds must be achieved. Lesser strengths may also be of interest. The viscosity thickeners must bond wood and similar porous substrates, as well as nonporous surfaces. The adhesive must be applied smoothly, as though poured.

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New Sensations for Saline Nasal Sprays

New sensations for saline sprays and washes must moisturize dry nasal passages and relieve a stuffy nose. Additives such as eucalyptus or sesame oil, for example, produce coolness or warmth. The desired effects must calm, soften, and relieve symptoms. An antibacterial effect and a physical rinse are of interest. Potential ingredients may include menthol, eucalyptus, lavender, heather, aloe vera, Echinacea, elderberry, and apple cider vinegar. A proposed solution, which must be drug-free, efficacious, and safe, may also feature a differentiated delivery device.

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Acceleration Sensor Enables New Robotics Applications

The Inclinos 3DS inclination and acceleration sensor, based on thermodynamic effects, exhibits no hysteresis in response signal (output lag). A power distribution of four heaters is controlled by a closed loop, and the temperature of each heater is constantly affected by any acceleration. The sensor has no moving parts, no inertial mass, and offers high responsivity from the idle position. Depending on the angle, the Inclinos measures 360-degree inclination on two axes.

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Water-Based Cooling Fluid Reduces Corrosion

A water/propylene glycol-based formulation acts as a heattransfer medium and reduces the corrosion of sensitive metals by 10x to 100x in heat exchangers, radiators, cold plates, and associated plumbing. The water-based cooling fluid can be used with equipment containing a variety of metals, while still providing freeze protection.

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Dissolution Device

To enhance transportability and shelf life, many drugs and pharmaceuticals are distributed as freeze-dried formulations. The formulations must be dissolved before they can be injected. A client therefore seeks a new device or container that helps lyophilized preparations dissolve rapidly and completely with diluents such as water. It is possible to improve dissolution by longer or faster stirring, or by heating, but the proposed solution must not apply heat or create bubbles. The formulation, intended for injection, needs to work with a variety of powdered drug types, thus showing versatility.

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Grab-Bars and Safety Grips

Because of their weight and the weight they bear, most grab-bars must be installed permanently in a home, usually by drilling through the wall material and into a wall stud. In the case of grab-bars installed in a tub enclosure or shower, a permanent hole may need to be drilled through ceramic tile, thus making a change to the material that is difficult to patch if the bar is removed later. A company desires a grab-bar solution that can attach to any surface, including tile or drywall, and later be removed without marring the underlying surface. The grab-bar must support up to 250 pounds and include a consumable or renewable feature.

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Manufacturing Process Supports Cost- Effective TPM Production

Transverse Flux Machines (TFMs) are brushless motors and generators that use permanent magnets. A TFM’s direction of magnetic flux is perpendicular to the direction of force, instead of parallel to it, as in a standard electric motor or generator. The machines are also inherently lighter, smaller, more power dense, and more powerful.

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