-Awarded for: Invention of new paint technology for the Three-Layer Wet Paint System (Patent number: 3831266)
-Recipients: Takakazu Yamane, Technical Research Center, Mazda Motor Corporation & Tsutomu Shigenaga, Technical Research Center, Mazda Motor Corporation
The Three Layer Wet Paint System is a one-step baking and drying coating method that applies three layers of paint in succession - primer coat, colored base coat and clear top coat - while still wet, without drying in between. Compared to the previous painting system, Volatile Organic Compound (VOC) emissions from the paint shop are reduced 45 percent and CO2 emissions are reduced 15 percent.
In order to achieve the reduction in VOC emissions, Mazda developed new low-solvent paints with reduced VOC content for use with its Three Layer Wet Paint System. Generally, reducing the volume of solvent in paint raises its viscosity and makes the paint unsuitable for coating. To maintain a low paint viscosity, Mazda managed to reduce the size of the paint molecules. However, when low-viscosity, low-solvent paints are applied in three successive layers, the layers tend to mix, causing a deterioration in glossiness and cloudy discoloration. Mazda overcame this issue by developing an interface control resin and adding it to the primer coat. The resin forms a barrier at the interface of the paint layers to ensure a high quality coating. Thanks to the newly developed paints, Mazda was able to eliminate the drying process previously required after applying the primer coat. By directly applying the color base coat and clear top coat after the primer, CO2 emissions were significantly reduced.
Since completing development of the Three Layer Wet Paint System in 2002, Mazda has introduced it to all of its paint shops in Japan and overseas. Following its utilization for mass production at Mazda, the coating method has spread through the automobile industry. More recently, Mazda has successfully developed the Aqua-tech Paint System, a new version of this technology that uses water-based paint, further reducing paint shop VOC emissions. Currently, Mazda is progressively rolling out the Aqua-tech Paint System to its production facilities.
The JIII award presentation ceremony will take place on Monday, June 20, 2011 at the Hotel Okura Tokyo. The following two researchers outside Mazda will share the award:
Joint recipients: Masakazu Watanabe, Nippon Paint Co., Ltd. & Takuhiro Kakii, Nippon Paint Co., Ltd.
For further information on the JIII, please visit: http://www.jiii.or.jp/english/e.htm
For further information on Mazda's environmental technologies, please visit: http://www.mazda.com/mazdaspirit/env/
Mazda Motor Corporation (TSE: 7261) started manufacturing tools in 1929 and soon branched out into production of trucks for commercial use. In the early 1960s, Mazda launched its first passenger car models and began developing rotary engines. Still headquartered in Hiroshima in western Japan, Mazda today ranks as one of Japan's leading automakers, and exports cars to the United States and Europe for over 30 years. For more information, please visit www.mazda.com.
Mazda Motor Corporation, Japan Corporate Communications Division +81-3-3508-5056 [Tokyo] +81-82-282-5253 [Hiroshima]
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