Nissan Motor Company Limited

Nippon Light Metal Company, Ltd.

Yushiro Chemical Industry Co., Ltd.

Tsutomu Hattori

Hirofumi Masui

Katsuo Iizuka

Satoru Nishigaki

Toshiya Anami

Toshio Hayashi

Pizhi Zhao

Yasuyuki Hirata

Takeshi Handa

Tomoyuki Hirayama

Koji Itakura

Yusuke Nagaishi

Kiyoshi Taki

Hirokazu Miyagawa

Shigenori Yoshizawa

Akio Yoshizawa

Shinichi Hashimoto

Mitsuyoshi Kitano

Shigeki Ebayashi

Hiromichi Tomihari

Hiroaki Tamura

An aluminum alloy sheet includes an aluminum alloy substrate having a composition containing, by mass percentage, 3.0 to 4.0% of magnesium, 0.2 to 0.4% of manganese, 0.1 to 0.5% of iron, not less than 0.03% but less than 0.10% of copper, and less than 0.20% of silicon, with the remainder being aluminum and unavoidable impurities. A peak concentration of a copper concentration distribution in a thickness direction in a region at a depth of 15 nm to 200 nm from the surface of the aluminum alloy substrate is equal to or more than 0.15%, and the aluminum alloy substrate has a recrystallized structure with an average grain size of 15 &#x3bc;m or less.

Aluminum alloy sheet and method for manufacturing same

The present invention relates to an undercoating composition and more particularly to an undercoating composition which has good application property and provides a coating film of low density having good resistance to corrosion, chipping, and secondary run. It will be used for automotive floor undercoating. The present invention of an undercoating composition which comprises (a) 100 parts by weight of a wax, (b) 10-200 parts by weight of a basic organic-inorganic dispersion composed of a metal salt of organic sulfonic acid, basic alkaline earth metal salt, and organic solvent, (c) 2-50 parts by weight of an .alpha.-olefin oligomer, and (d) 2-50 parts by weight of a metal salt of lanolin fatty acid. And another invention may be a composition in which (e) 1-30 parts by weight of an inorganic powder for 100 parts by weight of the total nonvolatile matter of the composition is added to the above-mentioned composition.

Undercoating composition

A cationic electrodeposition paint composition suitable for a wheel of an automotive vehicle. The paint composition contains an amine-modified epoxy resin and a blocked isocyanate as main components. The paint composition further contains a nonionic emulsified and dispersed type acrylic resin within a range from 6 to 30% by weight in resinous solid content relative to the total resin content of the paint composition, a colloidal silica-containing gelled particulate within a range from 10 to 30 PHR in solid content in paint composition, and an alkyltin ester compound of an aliphatic carboxylic acid within a range from 0.1 to 10 PHR in solid content in the paint composition, thereby improving corrosion resistance of an edge portion of the wheel and a weatherability of a paint film coated on the surface of the steel plate of the wheel.

Cationic electrodeposition paint composition containing colloidal

A cationic electrodeposition paint composition suitable to be coated on a road wheel of an automotive vehicle. The paint composition is composed of an acrylic cationic resin (A), a urethanated epoxy cationic resin (B) a hardner resin (C) of a blocked isocyanate, and a cationic cross-linked resin particulate (D) having an average particle size ranging from 0.01.mu. to 1.mu.. In the paint composition the acrylic cationic resin (A), the urethanated epoxy system cationic resin (B), the blocked isocyanate hardner resin (C) and the cationic cross-linked resin particulate are respectively in amount of 20 to 70 parts by weight, 5 to 50 parts by weight, 10 to 40 parts by weight and 1 to 20 parts by weight relative to 100 parts by weight of a total solid content of the resins and particulate (A), (B), (C) and (D), thereby improving the corrosion resistance of the paint composition to the cut edge portion of the road wheel and the weatherability of coated paint film.

Acrylic, urethanated epoxy and particulate amine-epoxy/polybutadiene

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Zama, Japan

Tsutomu Hattori