Dow technology cuts noise levels

September 2015

An advanced product from Dow Coating Materials that helps reduce noise was one of the main attractions at a conference on noise and vibrations in the US.

Accousticryl liquid-applied sound damping (LASD) technology embodying an advanced noise mitigation coatings system, for cars, white goods and a range of other applications reflects the new focus on quieter, greener and more congenial products of everyday use.

“We developed Acousticryl LASD technology based on feedback from customers who indicated a need for flexible, easy-to-apply, low-VOC capable coatings solutions to reduce noise and vibration in home appliances, cars and commercial architecture,” said Raymond Somich II, North America marketing manager, Dow Coating Materials. “The shift from steel-frame to unibody construction in automotive manufacturing and recent auto industry growth has increased the need for noise reduction materials that help original equipment manufacturers (OEMs) achieve faster model redesigns and line flexibility.”

Acousticryl LASD was the focus of live demos and a technical presentation at the premier noise, vibration and harshness conference in late June in Grand Rapids, Michigan (US).

Traditionally, bitumen pads are placed between door frames, under floor boards and other vibrating parts of a car to help dampen sound by reducing the mechanical vibrations that create unwanted noise.

These pads need to be stocked in various shapes and sizes, then trimmed before application. In contrast, Acousticryl acrylic resins require less inventory and storage space, generate a smaller amount of material waste and are compatible with automated application for reduced labour cost. These waterborne acrylic binders can also help to reduce workers’ exposure to VOC emissions.

“Using a one-step spray process, OEMs can apply these at various thicknesses depending on the levels of sound damping needed,” Somich said. “This flexibility enables complete coverage on multiple configurations, including areas that would otherwise be hard to reach.”

Acousticryl acrylic resins can help decrease vehicle weight for increased gas mileage, improved safety ratings and heightened passenger protection. They can be used in any application that could benefit from sound management and reduced noise, vibration and harshness. These include commercial transportation (marine, rail, bus); agriculture and construction equipment; appliances (washing machine, dishwasher, air conditioner); and infrastructure (roof, floor, wall, duct, service conduit).

For optimised performance, Acousticryl technology may be combined with Avanse acrylic emulsion technology from Dow for an improved dispersion quality.

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