Toyota Jidosha Kabushiki Kaisha

Kansai Paint Company, Ltd.

Nihon Parkerizing Co., Ltd.

Daihatsu Motor Company, Ltd.

Nippon Paint Automotive Coatings Co., Ltd

Eisaku Okada

Hirokazu Hayashi

Masaharu Shimoda

Takaomi Nakayama

Tadashi Matsushita

Fumiya Yoshida

Katsuhiro Shiota

Hiroyuki Sato

Masahiko Ishii

Minoru Hanatani

Kouji Takezoe

Kazuhiro Ishikura

Yoshikazu Kasahara

Yoshinobu Watanabe

Takashi Irie

Hideki Ichimura

Michiro Kurosawa

Tetsuo Ootsuki

An intermediate coating composition used in forming an intermediate coating layer directly overlaid on a surface of an electrodeposition coating layer constructing a vehicle outer panel, the coating composition containing as resin components: (a) 1% to 27% by mass of a polycaprolactonetriol; (b) 20% to 60% by mass of a blocked isocyanate; and (c) 1% to 20% by mass of a melamine resin, each at a percentage content in entire resin components, and the coating composition further containing as a pigment component: (d) 1% to 10% by mass of talc in terms of pigment mass concentration. As the resin component, (e) greater than 0% to 10% by mass of an epoxy resin is preferably contained. A urethane curing catalyst is preferably contained in an amount of greater than 0.01 parts to 2 parts by mass with respect to 100 parts by mass of the entire resin components.

Intermediate coating composition, multilayered coating film, and method for forming the multilayered coating film

The present invention provides a cationic electrodeposition coating composition comprising: a specific amino group-containing modified epoxy resin (A); a blocked polyisocyanate curing agent (B); a water-soluble zirconium compound (C); and sulfamic acid, wherein the water-soluble zirconium compound (C) is present in an amount of 10 to 10,000 ppm, calculated as the mass of the elemental zirconium, relative to the mass of the cationic electrodeposition coating composition.

Cationic electrodeposition coating composition and coated article

This invention concerns a method for forming a coating film on a metallic substrate by a multistage energization method at no less than two stages using an electrodeposition bath which comprises a water-based film-forming agent comprising zirconium compound and, as the base resin, an amino group-containing modified epoxy resin which is obtained through reaction of an epoxy resin with an amino group-containing compound, said epoxy resin having been obtained through reaction of a diepoxide compound, a bisphenol epoxy resin and bisphenols; whereby coated articles excelling in corrosion resistance are offered.

Method for forming coating film

This invention relates to a method for forming on a metal substrate a surface treating film excelling in corrosion resistance and stability of film-forming agent, by applying a film-forming agent thereto by a multistage electrification system comprising at least two stages.

Method for forming surface-treating film

A composition for surface treatment of aluminium, aluminum alloys, magnesium or magnesium alloys and the treating solutions being diluted to the desired concentration are defined. The composition contains (1) compound A containing at least one metal element selected from the group consisting of Hf(IV), Ti(IV) and Zr(IV), (2) a fluorine-containing compound of sufficient amount to make fluorine exist in the composition in an amount of at least 5 times the molarity of the total molarity of the metal contained in the above-mentioned compound A, (3) at least one metal ion B selected from the group of alkaline earth metals, (4) at least one metal ion C selected from the group consisting of Al, Zn, Mg, Mn and Cu, and (5) nitric ion and the mol concentration of compound A is 0.1-50 mmol/L as the metal element of Hf(IV), Ti(IV) and Zr(IV). A metal treated with the treating method of the present invention solution has an excellent resistance to various corrosive environments.

Surface treating solution for surface treatment of aluminum or magnesium metal and a method for surface treatment

This invention relates to a method for forming on a metal substrate a surface treating film excelling in corrosion resistance and stability of film-forming agent, by applying a film-forming agent by a multistage electrification system comprising at least two stages.

The present invention is the method for surface treatment of a metal material containing iron and/or zinc, containing component (A) and component (B); where

Treating solution for metal surface treatment and a method for surface treatment

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Toyota, Japan

Eisaku Okada