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Bayer developed UV protection for polycarbonate

February 14/2012

(press.bayer) -- AURA infusion technology, developed by Bayer MaterialScience LLC, offers a cost-effective and environmentally responsible way to improve the UV protection of injection molded or extruded polycarbonate parts. The company has licensed the technology exclusively to Radco Infusion Technologies LLC, for worldwide use.

Because ultraviolet (UV) light attacks polycarbonate at the surface, UV protection is most effective when concentrated there. Yet, with traditional compounding of additives it is not possible to concentrate protection at the surface. This limits UV absorber effectiveness in outdoor applications, such as lenses and covers for lighting fixtures, where protection from sunlight is essential to durability and clarity.

The new dimension of AURA infusion technology, made possible by Radco, can be used with any of Bayers Makrolon  transparent polycarbonate lighting grades, said Kevin Dunay, market segment leader, Electrical/Electronics (EE) Polycarbonates, Bayer MaterialScience LLC. He continued, Its a breakthrough for lighting manufacturers, since it helps overcome the issue of yellowing after extended UV exposure.

The infusion of UV additives via AURA infusion technology utilizes the same process used to add custom colorants. In this new twist, finished plastic parts are immersed in a mostly aqueous solution containing UV additives. The parts are removed from the solution after a short period of time, rinsed with water to remove excess solution from the surface and then dried to produce a market-ready product.

In addition to being efficient and cost-effective, it is also an eco-friendly process. AURA Infusion Technology works in a water-based medium with a minimum of organic additives. The liquid, constantly recycled and reused, does not add to the waste stream. Processing solvents are reclaimed and reused within the system, and the process produces no hazardous waste.

Author:Anna Larionova
Category:General News
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