Kansai Paint Company, Ltd.

Fujikura Limited

Jfe Steel Corporation

Nkk Corporation

Matsuo Sangyo Co., Ltd.

Hiroyasu Matsuki

Masaaki Yamashita

Akira Matsuzaki

Takahiro Kubota

Naoto Yoshimi

Kaoru Sato

Tatsuya Miyoshi

Satoru Ando

Masaru Sagiyama

Kazuo Sanada

Reijiro Nishida

Tsutomu Maruyama

Shoichi Tanaka

Hisato Noro

Haruo Nakamichi

Yasuhiko Haruta

Akihiko Furuta

Masahiro Murata

Takafumi Yamaji

Sadao Chigira

Atsushi Akiyama

Atsushi Shioda

Reijirou Nishida

Masanobu Hidaka

Shingo Amaki

Yoshikazu Morohoshi

Tohru Iwamoto

Kenichi Tomita

Okai Kazuhisa

The invention is to provide a surface-treated steel sheet of good white rust resistance with no chromium in its surface treatment film, and it has realized a surface-treated steel sheet of higher-level corrosion resistance by forming a reaction layer of plating metal with a barrier layer effective for anticorrosion not in a two-layered film but in a single-layered film. The surface-treated steel sheet is fabricated by applying a surface-treating composition that contains:

Surface-treated steel sheets of good white rust resistance, and method for producing them

A resin composition, which is obtained by quaternary salt-formation reaction, in the presence of a tertiary amine, of a copolymer and an amine-modified epoxide resin. Also disclosed herein is a water-borne coating comprising the resin. The coating composition can form superior coating film in surface appearance, adhesion, fabrication, coating film hardness, yellowing resistance and retort resistance, and has good coatability, and low organic solvent content.

Resin composition for water borne coatings and water borne coating composition

A coated steel sheet having excellent corrosion resistance comprises: a zinc or a zinc alloy plated steel sheet or an aluminum or an aluminum alloy plated steel sheet; a composite oxide coating formed on the surface of the plated steel sheet; and an organic coating formed on the composite oxide coating. The composite oxide coating contains a fine particle oxide and a phosphoric acid and/or a phosphoric acid compound. The organic coating has thickness of from 0.1 to 5 &mgr;m.

Coated steel sheet having excellent corrosion resistance and method for producing the same

A method for reading of information, which comprises printing information on a metal substrate or a substrate capable of transmitting infrared rays of 2-10 .mu.m wavelength, with a marking ink containing tin oxide, indium-tin mixed oxide or a mixture of tin oxide or indium-tin mixed oxide and at least one compound selected from the group consisting of alumina, barium sulfate, silicon dioxide and calcium carbonate, as necessary coating a clear coating or a coloring ink on at least the information-printed area of the substrate, and identifying the information by the use of a CCD camera sensitive to infrared rays of 2-10 .mu.m wavelength or an infrared detector. No noise is generated even when the reflectance of a light from the substrate surface is large, and the information can be identified (read) easily.

Method for reading of invisible marking

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Hiratsuka, Japan

Hiroyasu Matsuki