Nippon Paint Compnay, Ltd.

Toyo Kohan Co., Ltd.

Other

Showa Denko K.k.

Toyo Seikan Group Holdings, Ltd.

Chemetall Gmbh

Toyo Seikan Co., Ltd.

Nippon Paint Surf Chemicals Co., Ltd.

Fujirebio Inc. (Fujirebio Kabushiki Kaisha)

Nippon Print Co., Ltd.

Masahiko Matsukawa

Toshio Inbe

Tatsuo Yoshida

Katsuyoshi Yamasoe

Wataru Kurokawa

Kunihiro Yoshimura

Fujio Mikami

Hidekimi Hirasawa

Kotaro Kikuchi

Toshiaki Shimakura

Kazuhiro Makino

Shintaro Nakagawa

Miwa Iida

Keisuke Yoshida

Seitaro Kanazawa

Mitsuhide Aihara

Shinichi Taya

Munemitsu Hirotsu

Kouji Mizohata

Naomi Iida

Yoshihiro Ashihara

Kentaro Saito

Takashi Sudo

Yuko Wada

Yusuke Wada

Masahisa Okada

Motohiro Sasaki

Masahiro Kojima

Masanobu Futsuhara

Masanobu Matsubara

Katsuaki Yoshioka

Mitsuo Isomura

Marie Sasaki

Miwa Uchikawa

Satoko Harada

Kousuke Sasaki

Kasuyoshi Yamasoe

Makoto Anan

Hitoshi Kayama

Jiping Yang

The present invention provides a heat exchanger which is imparted with high deodorizing properties in terms of cigarettes. A heat exchanger which has a hydrophilic coating film on the surface of a substrate that is formed from aluminum, and wherein the hydrophilic coating film is formed using a hydrophilizing agent that contains 0.8-1.8% by mass of a vanadium compound in terms of elemental vanadium, while containing 90% by mass or more of a resin which contains 38-40% by mass of a polyvinyl alcohol having an ethylene chain, 22-24% by mass of a radically polymerizable monomer having a carboxylic acid, 15-17% by mass of a radically polymerizable monomer represented by general formula and 22-24% by mass of a polyethylene glycol.

Heat exchanger and method for hydrophilizing heat exchanger

A surface-treated steel sheet for cans forming a coating of a compound containing chiefly Zr and containing F, the amount of Zr being 80 to 200 mg/mand the amount of F being not less than 12 mg/min the coating on the surface that becomes the outer surface side of the can. The surface-treated steel sheet is capable of effectively preventing the resin coating from peeling on the outer surface side of the can at dented portions.

Surface-treated steel sheet, process for producing the same and resin-coated surface-treated steel sheet

Provided is a method for producing a surface-treated steel sheet including the step of forming a layer mainly composed of an oxygen compound containing Al onto a tin-plated steel sheet by conducting cathode electrolytic treatment to the tin-plated steel sheet using an electrolytic treatment solution containing Al ions and nitrate ions. For the electrolytic treatment solution, an electrolytic treatment solution not containing F ions and where the amount of nitrate ions contained is 11,500 to 25,000 ppm by weight is used.

Method for producing surface-treated steel sheet, surface-treated steel sheet, and organic resin coated metal container

To provide a bath for surface treatment capable of forming a surface-treating film having excellent corrosion resistance by a high-speed electrolytic treatment, and a method of producing a surface-treated steel plate having excellent corrosion resistance and closely adhering property to the coating maintaining good productivity. A bath for surface treatment used for forming a surface-treating film on the surface of a steel plate by cathodic electrolysis, the bath for surface treatment containing Zr and/or Ti, and a polycarboxylic acid.

Bath for surface treatment, method of producing surface-treated steel plate by using the bath for surface treatment, and surface treated steel plate produced by the same method

A method for surface treating a heat exchanger, a hydrophilizing treatment agent used in this method, and an aluminum heat exchanger obtained from this method are provided that excel in the initial adherence, hydrophilicity, and odor suppressibility, and can maintain these abilities for an extended time, while having little burden on the environment and the human body. The method for surface treating an aluminum heat exchanger that is brazed includes (1) a pickling treatment step; (2) a chemical conversion treatment step; and (3) a hydrophilization treatment step, in which the acidic cleaning agent contains nitric acid and sulfuric acid and contains ferric salt in a predetermined amount, the hydrophilizing treatment agent contains silica grains coated with a vinyl alcohol polymer and a polyallylamine resin.

Method for surface treating a heat exchanger, hydrophilizing treatment agent, and aluminum heat exchanger

A surface-treated steel plate obtained by forming, on at least one surface of the steel plate by cathodic electrolysis, a surface-treating film which contains a mixed oxide of an oxide of Fe and at least one of an oxide of Zr or an oxide of Ti, and a polycarboxylic acid, the amount of Zr or Ti, or the total amount of Zr and Ti if both of them are present, being from 3 to 300 mg/mand the amount of C being from 0.1 to 5.0 mg/m.

Surface-treated steel plate

A method for surface treating a heat exchanger and an aluminum heat exchanger obtained from this method are provided that can effectively suppress the foul odor characteristic to flux that emanates following degradation of a hydrophilic coating film and a chemical conversion coating film in a non-corrosive flux brazed heat exchanger on which flux easily remains. The method for surface treating a non-corrosive flux brazed heat exchanger made of an aluminum material conducts a pickling treatment step, a chemical conversion treatment step, and a deodorizing treatment step on the heat exchanger, in which the acidic cleaning agent contains nitric acid and sulfuric acid as well as a predetermined amount of ferric salt, and the surface treatment agent contains silica grains coated by a vinyl alcohol polymer and polyallylamine resin such that the total content of the silica grains and the vinyl alcohol polymer is a predetermined amount.

Method for surface treating a heat exchanger, surface treatment agent, and aluminum heat exchanger

A surface-conditioning composition includes a particle of a phosphate of a bivalent or trivalent metal and has a pH value ranging from 3 to 12. The particle has a Dvalue of 3 &#x3bc;m or less. The composition additionally includes (1) at least one metal alkoxide selected from a silane alkoxide, a titanium alkoxide and an aluminum alkoxide and (2) a stabilizing agent.

Surface-conditioning composition comprising metal phosphate particles, metal alkoxide and stabilizer, and method of production thereof

It is an object of the present invention to provide a pretreatment method for coating, which does not limit a coating method, places a less burden on the environment and can apply good chemical conversion treatment to all metals such as iron, zinc, aluminum and so on. A pretreatment method for coating comprising treating a substance to be treated by a chemical conversion coating agent to form a chemical conversion coat, wherein the chemical conversion coating agent comprises: at least one kind selected from the group consisting of zirconium, titanium and hafnium; fluorine; and at least one kind selected from the group consisting of amino group-containing silane coupling agents, hydrolysates thereof and polymers thereof.

Pretreatment method for coating

A surface conditioning composition is provided in which a titanium phosphate compound can be stored in the state of a dispersion liquid for a long period of time while being stably present in the dispersion liquid, with favorable stability also in the bath, and with the composition being capable of forming a conversion coating film in a sufficient amount of the film even in the case of application to conversion resistant metal materials such as high-tensile steel sheets.

Surface conditioning composition and surface conditioning method

A composition for surface conditioning includes bivalent or trivalent metal phosphate particles having a pH of 3 to 12, with Dof the particles being 3 &#x3bc;m or less and including an amine compound having a MW of 1000 or less, plus at least one metal alkoxide in a content of from 0.01 to 1000 parts by weight per 100 parts by weight of the solid content of the metal phosphate particles.

Composition for surface conditioning and a method for surface conditioning

A surface-conditioning composition can form a denser phosphate coating film having more satisfactory coating weight on the surface of a metal material compared to a conventional one and, therefore, can reduce the electrolytic corrosion of a metal material during a chemical conversion treatment, form a chemical conversion coating film having a satisfactory coating weight even when applied to a hardly convertible metal material (e.g., an aluminum metal material, a high tensile strength steel plate), improve the productivity rate of the chemical conversion treatment, resulting in the reduction of the time required for the chemical conversion treatment, and enables a metal phosphate particle to be dispersed in a surface-conditioning solution highly stably. This composition includes a particle of a phosphate of a bivalent or trivalent metal and has a pH value ranging from 3 to 12. The particle has a Dvalue of 3 &#x3bc;m or less. The composition additionally includes (1) a phenolic compound and (2) a stabilizing agent.

Surface-conditioning composition, method for production thereof, and surface conditioning method

The present invention disclosure provides a chemical conversion coating agent which places a less burden on the environment and can apply good chemical conversion treatment to all metals such as iron, zinc and aluminum, and a surface-treated metal obtained using the same. The chemical conversion coating agent comprising: at least one kind selected from the group consisting of zirconium, titanium and hafnium; fluorine; and a water-soluble resin, wherein said water-soluble resin has, in at least a part thereof, a constituent unit expressed by the chemical formula (1): and/or the chemical formula (2): 

Chemical conversion coating agent and surface-treated metal

It is an object of the present invention to provide a pretreatment method for coating, which places a less burden on the environment and can apply good chemical conversion treatment to all metals such as iron, zinc and aluminum. A pretreatment method for coating comprising

A treatment agent for hydrophilicity preferable for aluminum materials used for heat exchanger parts and air filter parts of air cleaner which can maintain the deodorizing property and hydrohilicity even after a long-time use, and a method of preparing said treatment agent. A treatment agent for hydrophilicity according to this invention comprising silica particulates and polymer of vinyl alcohol series in the weight ratio in the range 30:70&tilde;70:30, amounting to 0.2&tilde;25 weight percent in total of both relative to the entire treatment agent, in which said silica particulates are coated with said polymer of vinyl alcohol series, and dispersed in aqueous medium as coated particles having the average particle diameter 5&tilde;1000 nm.

Treatment agent for hydrophilicity and method for preparing thereof

Growing community of inventors

Tokyo, Japan

Masahiko Matsukawa