Kansai Paint Company, Ltd.

Toyota Jidosha Kabushiki Kaisha

Kansai Print Co., Ltd

Shigeo Nishiguchi

Koji Kamikado

Akihiko Shimasaki

Akira Tominaga

Tadayoshi Hiraki

Hideki Iijima

Reijiro Nishida

Hidenori Sawada

Osamu Isozaki

Reiziro Nishida

Fumiaki Nakao

Yukihiro Nemoto

Susumu Midogochi

Reijirou Nishida

Sinzi Hirato

Akiko Kato

Yasumasa Okumura

Akimasa Nakahata

Hidehiko Haneishi

Satoshi Ikushima

Kazuhiko Ohnishi

Haruhiko Aida

Masami Sugishima

Katsuhisa Sugisaki

Shinji Miyatake

Kiyoshi Kato

Masaharu Shimoda

Eiji Kuwano

Souichi Ikejiri

Naoyuki Yoshikawa

Nobuhita Hirata

Sachio Yamaguchi, Deceased

Susumu Kansai-Paint-Hiratsuka-Cluba204 Midogochi

The present invention provides a cationic electrodeposition coating composition that has excellent throwing power and that can form a thin film with excellent finish and anti-corrosion properties. The composition has a cationic epoxy resin (A) and a blocked polyisocyanate (B), the cationic epoxy resin (A) obtained by reacting an epoxy resin (A1) with an amino group-containing compound (A2). The epoxy resin (A1) having a catechol skeleton structure (a) and obtained by reacting an epoxy resin (a1) containing at least one epoxy group per molecule and having an epoxy equivalent of 180 to 500 with a phenolic hydroxyl group-containing compound (a2) containing at least one phenolic hydroxyl group per molecule in amounts wherein the ratio of the number of moles of epoxy groups in the epoxy resin (a1) to the number of moles of phenolic hydroxyl groups in the phenolic hydroxyl group-containing compound (a2) is 1.3 to 2.0.

Cationic electrodeposition coating composition

This invention discloses cationic electrodeposition paint compositions which comprise specific amino group-containing modified epoxy resin, specific xylene-formaldehyde resin-modified, amino group-containing epoxy resin and blocked polyisocyanate curing agent at specific blend ratios, and which can form coating film of excellent film thickness retention, finished appearance and electrocoatability on galvanized alloy steel sheet and of good corrosion resistance, even when the amount of volatile organic compound in the cationic electrodeposition paint is reduced.

Cationic electrodeposition paint compositions

The present invention provides a coated product having excellent corrosion resistance and excellent finish by a 3-coat 1-bake method;

Method for forming coating film and coated article

A cationic electrodeposition coating composition comprising a cationic resin (A) and a blocked polyisocyanate (B) obtained by reaction between a polyisocyanate compound (b1) with two or more isocyanate groups, castor oil (b2) and a blocking agent (b3). The cationic electrodeposition coating composition has excellent throwing power, suitability for electrodeposition onto hot dip galvanized steel sheets, finished appearance and corrosion resistance.

Cationic electrodeposition coating composition and articles coated with the electrodeposition coating

A cationic electrodeposition coating composition including amino group-containing modified epoxy resin (A), blocked polyisocyanate curing agent (B), metal compound (C), and nitrogen oxide ion (E), wherein metal compound (C) is contained in an amount of 10 to 10,000 ppm calculated as metal, and nitrogen oxide ion (E) is contained in an amount of 50 to 10,000 ppm relative to the mass of the cationic electrodeposition coating composition. A coated article in which an electrodeposition coating film is formed on an untreated steel sheet exhibits excellent corrosion resistance, in particular, excellent hot salt water immersion resistance at 55&#xb0; C.; and a multilayer coating film formed by a 3-coat 1-bake coating method on the electrodeposition coating film, which is formed on the untreated steel sheet, exhibits excellent corrosion resistance in a combined corrosion cycle test.

A cationic electrodeposition coating composition including amino group-containing modified epoxy resin (A), blocked polyisocyanate curing agent (B), phenol resin (C), metal compound (D), and nitrogen oxide ion (E), wherein the metal compound (D) is contained in an amount of 10 to 10,000 ppm calculated as metal and the nitrogen oxide ion (E) is contained in an amount of 50 to 10,000 ppm, relative to the mass of the cationic electrodeposition coating composition. The cationic electrodeposition coating composition exhibits excellent anti-corrosion properties when coated onto untreated steel sheets.

An object of the present invention is to provide a coating composition that has excellent electrodeposition coating applicability onto hot dip galvanized steel sheets, and that provides a cationic electrodeposition coating film having a superior finish and excellent anti-corrosion properties. The present invention provides a cationic electrodeposition coating composition having: amino group-containing modified epoxy resin (A), phenolic hydroxy group-containing resin (B), and blocked polyisocyanate curing agent (C), the components (A), (B), and (C) being contained in amounts of 5 to 50 mass %, 20 to 75 mass %, and 10 to 40 mass %, respectively, based on the total solids mass of the components (A), (B), and (C).

This invention discloses a cationic electrodeposition paint composition containing an amino group-containing modified epoxy resin which is obtained through reaction of specific modified epoxy resin with xylene formaldehyde resin having phenolic hydroxyl groups and amino group-containing compound. The cationic electrodeposition paint composition excels in film thickness retention, finished appearance of coating film and electrocoatability of galvanized alloy steel sheet and can form coating film having good corrosion resistance, even when its content of volatile organic compound (VOC) is reduced.

Reaction product of epoxy resins, bisphenol, xylene-formaldehyde and amine in cationic electrodeposition paint

A coated article is obtained by electrodeposition coating using an electrodeposition coating composition, which comprises: (A) a resin component obtained by reacting an epoxy resin, an amino compound and/or a phenolic compound; (B) a resin component having a specific structural unit; (C) a blocked polyisocyanate compound; and (D) at least one rust inhibiting component selected from the group consisting of metal ions selected from zirconium, titanium, cobalt, vanadium, tungsten and molybdenum, oxymetal ions of the metal, and fluorometal ions of the metal.

Electrodeposition coating composition, coating method and coated article

A cationic electro-deposition coating composition, comprises: Component (A): an amino-containing epoxy resin (A) obtained by adding an amino-containing compound (a-2) to an epoxy resin (a-1) having an epoxy equivalent of from 400 to 3000, Component (B): an amino-containing acrylic resin (B) obtained by adding an amino-containing compound (b-4) to a copolymer resin obtained by radical copolymerization of, as essential components, a polylactone-modified hydroxyl-containing radical copolymerizable monomer (b-1), which is obtained by adding a lactone to a hydroxyl-containing acrylic monomer (b), and glycidyl (meth)acrylate (b-2), and another radical copolymerizable monomer (b-3); and Component (C): a blocked polyisocyanate curing agent (C) as a curing component, the component (A), component (B) and component (C) being added in amounts of 5 to 80 wt %, 5 to 80 wt % and 10 to 40 wt %, respectively, based on the total solid content of the components (A), (B) and (C).

Cationic electro-deposition coating compositions

The present invention provides a cationic paint composition containing, as a vehicle component, a xylene-formaldehyde resin-modified amino group-containing epoxy resin obtained by reacting an epoxy resin having an epoxy equivalent of 180 to 2,500 with an alkyl phenol and/or a carboxylic acid, a xylene-formaldehyde resin, and an amino group-containing compound.

Cationic paint composition

The present invention provides a cationic resin composition comprising a cationic resin (A) and a blocked polyisocyanate (B) obtained by reacting an active hydrogen-containing component comprising a diol (a) which has two hydroxyl groups having different reactivities from each other and which has a molecular weight of 76 to 150 and a carboxyl group-containing diol (b) having a molecular weight of 106 to 500 with a polyisocyanate compound (c).

Cationic resin composition

The present invention provides a cationic coating composition capable of forming a coating film which is excellent in an electrodepositablly coating property and an adhesive property toward a rust preventive steel plate, a corrosion resistance and a low temperature curability. The cationic coating composition described above comprises as a vehicle component, a xylene-formaldehyde resin-modified, amino group-containing epoxy resin obtained by reacting an epoxy resin (A) having an epoxy equivalent of 180 to 2500 with a xylene-formaldehyde resin (B) and an amino group-containing compound (C).

Cationic coating composition

The present invention provides a cationic paint composition containing as resin component a polyol-modified amino group-containing epoxy resin obtained by reacting an epoxy resin with epoxy equivalent 180-2500 with a alkyl phenol and/or a carboxylic acid; a polyol obtained by adding a caprolactone to a compound containing a plurality of active hydrogen groups and an amino group-containing compound.

This invention relates to cationic electro-coating composition which comprises blending which an aqueous dispersion or an aqueous dispersion paste which contains an organic acid-modified bismuth compound in a non-water-soluble state, and which is obtained by mixing and grinding a bismuth compound and an organic acid in an aqueous medium. Said cationic electro-coating composition, although containing no lead compounds, is capable of forming an electrocoated film which is excellent in corrosion resistance, appearance, etc.

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Hiratsuka, Japan

Shigeo Nishiguchi