Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Chuo Kenkyusho

Toagosei Company, Ltd.

Kanji Mori

Kazuyuki Tachi

Takeshi Narita

Eiichi Okazaki

Atsuo Nabeshima

Keiji Ambo

Shuji Yomo

Kazuo Okamoto

Mamoru Kouzaki

Masao Tsuji

Akira Nishimura

Kazuyuki Kuwano

Satoshi Kodama

Katsunobu Mochizuki

Kazuki Ofusa

Nobuaki Koike

Shinya Kanbe

The present invention provides an electron beam curable coating composition comprising: an electron beam curable component (A) which contains 10% by mass or more of a multifunctional (meth)acrylate; and a room temperature curable component (B) which contains 1 to 15% by mass of an isocyanate group and is not cured by electron beam irradiation, wherein a solid content mass ratio of the component (B) to a total amount of the components (A) and (B) is 20 to 55% by mass.

Electron beam curable coating composition

An object of the present invention is to provide a method for producing a coated material by using a composition that can be spray-coated, and that does not run downward after coating (i.e., rheology controllable). The method for producing a coated material includes step (1) of applying an electron beam-curable composition containing an ethylenically unsaturated group-containing compound to a substrate to form a coating film that has a surface viscosity of 1 Pa&#xb7;s to 300 Pa&#xb7;s as measured based on an electric-field pickup method, step (2) of drying the coating film obtained in step (1) to form a dry coating film when the electron beam-curable composition contains a volatile component, and step (3) of irradiating the substrate that has the coating film obtained in step (1) or the dry coating film obtained in step (2) with electron beams in an inert gas atmosphere to form a cured coating film.

Method for producing coated material by using electron beam-curable composition

Provided is a method of applying an electron beam curable aqueous coating material, including coating a surface of a material to be coated with the electron beam curable aqueous coating material to form a wet coating film; drying the wet coating film until a time integration value of a reciprocal of an average value of viscosities of a region from a surface of the wet coating film to a depth of one half a film thickness of the wet coating film is in a range of 0.30 (Pa&#xb7;s)&#xb7;min to 0.90 (Pa&#xb7;s)&#xb7;min, which is acquired by an electric field pick-up method, and a solid content concentration of the wet coating film is 90% by mass or greater; and curing the obtained dry coating film by irradiation with an electron beam after the wet coating film is dried.

Method of applying electron beam curable aqueous coating material

A coating method is a method for forming a multilayer coating film including at least one lower layer formed on a substrate and an uppermost layer formed on the lower layer, and the coating method comprises the steps of: preparing a certain curable coating material as an uppermost layer-coating material for forming the uppermost layer, and preparing a certain coating material as at least one lower layer-coating material for forming the lower layer; forming an uncured multilayer coating film by applying the lower layer-coating material and the uppermost layer-coating material on the substrate using a wet-on-wet technique; and curing at least the uppermost layer-coating material by subjecting the uncured multilayer coating film to a curing treatment.

Coating method and coated article obtained by the same

A weathering test method comprising making active oxygen and light simultaneously act on a test piece, a weathering test method comprising successive and/or alternate steps of making active oxygen and light simultaneously act on a test piece and making at least one of light, oxygen, and water to act on the test piece, and apparatus for carrying out the methods are disclosed. In evaluating weatherability of organic materials, articles made of organic materials or articles coated with organic materials, the methods and apparatus achieve acceleration of deterioration of test pieces to greatly reduce the testing time.

Weathering test apparatus

Weathering test method

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Aichi, Japan

Kanji Mori