YUKEN INDUSTRY CO., LTD. Patent applications |
Patent application number | Title | Published |
20140190835 | PLATING APPARATUS, NOZZLE-ANODE UNIT, METHOD OF MANUFACTURING PLATED MEMBER, AND FIXING APPARATUS FOR MEMBER TO BE PLATED - A plating apparatus includes a plating bath, an insoluble anode located in the plating bath, a plating electric power supply being capable of applying a voltage between the insoluble anode and the member to be plated, an anode-displacement mechanism being capable of moving the insoluble anode in the plating bath and of holding the insoluble anode at a predetermined position in the plating bath, and a controller having an anode-position controller being capable of generating a control signal for controlling an action of the anode-displacement mechanism and of outputting the control signal to the anode-displacement mechanism. | 07-10-2014 |
20140130941 | AQUEOUS ACIDIC COMPOSITION FOR FORMING CHROMIUM-CONTAINING CHEMICAL CONVERSION COATING ON IRON-BASED MEMBER, AND IRON-BASED MEMBER HAVING CHEMICAL CONVERSION COATING FORMED USING THE COMPOSITION - An aqueous acidic composition is provided for forming a chromium-containing chemical conversion coating on a member having an iron-based metal surface. The composition contains a water-soluble trivalent chromium-containing substance, a water-soluble zinc-containing substance, and a water-soluble polyvalent carboxylic acid compound. On the total composition basis, the water-soluble trivalent chromium-containing substance has a content of 60 mmol/L or more in terms of chromium, the water-soluble zinc-containing substance has a molar content in terms of zinc such that a ratio of the content is 0.6 or more to a molar content in terms of chromium of the water-soluble trivalent chromium-containing substance, and the water-soluble polyvalent carboxylic acid compound has a content of 55 mmol/L or more in terms of polyvalent carboxylic acid. The composition is free from allylamine, polyallylamine, aromatic sulphonic acid, aromatic sulphonic acid-formaldehyde condensate, and derivatives thereof, and fluorine-based substance, hexavalent chromium-containing substance, and film-forming organic component. | 05-15-2014 |
20140054175 | ACIDIC AQUEOUS COMPOSITION FOR SEMIGLOSSY TIN PLATING AND MEMBER HAVING SEMIGLOSSY TIN PLATING FILM - An acidic aqueous composition for semiglossy tin electroplating has a water-soluble tin (II)-containing substance and a surfactant. The surfactant includes a surfactant (A) comprising N,N′,N′-polyoxyethylene-N-alkyl-1,3-diaminopropane. The surfactant (A) the number of carbon atoms of the alkyl group that bonds to N ranges from 14 to 18. The weight-average molecular weight of the surfactant (A) ranges from 300 to 1500. | 02-27-2014 |
20130177709 | FINISHING AGENT FOR CHEMICAL CONVERSION COATING AND METHOD FOR PRODUCING SAME - The following two means are provided for a finishing agent for a chemical conversion coating wherein the finishing agent is capable of forming a finishing coating having an excellent corrosion resistance and excellent appearance as well as being suppressed in the elution of trivalent chromium: (A) the ratio of the chromium equivalent molar concentration of a water-soluble trivalent chromium-containing substance contained in the finishing agent relative to the phosphorus equivalent molar concentration of a water-soluble phosphoric acid-based compound contained in the finishing agent is 0.5 or more; and (B) a water-soluble aluminum-containing substance and/or a water-soluble zirconium-containing substance are contained in the finishing agent such that the ratio of the total of the chromium equivalent molar concentration of the water-soluble trivalent chromium-containing substance, the aluminum equivalent molar concentration of the water-soluble aluminum-containing substance, and the zirconium equivalent molar concentration of the water-soluble zirconium-containing substance relative to the phosphorus equivalent molar concentration of the water-soluble phosphoric acid-based compound is 0.5 or more. | 07-11-2013 |
20130143034 | Rust-Preventive Coating - A rust-preventive coating comprises a zinc-containing coating obtained by heating a liquid layer comprising a zinc-containing inorganic-based paint that contains: an inorganic binder including an organic silicon compound and an organic titanate compound; and a metal-based powder, wherein the metal-based powder comprises aluminum-based powder and zinc-based powder, and this aluminum-based powder is such that a particle size D50 when a percent passing by weight is 50% in a particle-size accumulation curve is 10 μm or more and 20 μm or less, a leafing value is 70% or more, and a mass ratio to the metal-based powder is 10 mass % or more and 40 mass % or less. | 06-06-2013 |
20130143032 | Rust-Preventive Coating - A rust-preventive coating comprises two layers of coatings contacted with each other, wherein among the two layers of coatings, a first coating as a coating at an inner layer side is obtained from a first paint composition that contains a first metal-based powder and a first binder component, among the two layers of coatings, a second coating as a coating at an outer layer side is obtained from a second paint composition that contains a second metal-based powder and a second binder component, and compositions are different between the first metal-based powder and the second metal-based powder. | 06-06-2013 |
20130085093 | AQUEOUS CLEANING AGENT COMPOSITION - As a general-purpose aqueous cleaning agent composition which has excellent oil separability adaptable even to water soluble machining oils, the present invention provides an aqueous cleaning agent composition including an emulsifying agent that removes an oil component from a member subjected to cleaning to which the oil component is adhering and emulsifies the oil component, a separating agent comprised of an anionic polymer and a separating auxiliary agent comprised of a cationic surfactant. It is preferred that the molecular weight of the anionic polymer is 1500 to 50000. It is also preferred that the HLB value of the separating auxiliary agent is a value of 26 or more as defined by the Davies' method. | 04-04-2013 |
20120141686 | Rust-Proof Paint Composition And Method Of Manufacturing A Member Having A Rust-Proof Coating Using The Rust-Proof Paint Composition - A rust-proof coating, which does not contain a hazardous metal such as chromium and is able to form a thin coating in which crack generation is inhibited even after a baking treatment at a high temperature, including based on the whole composition, 5 to 40% by weight of an organic silicon compound, 0.05 to 5.0% by weight of an organic titanium compound, 20 to 60% by weight of one or more metal powders selected from the group of zinc powder, zinc alloy powder, and aluminum powder, and 10 to 60% by weight of an organic solvent. A coating having excellent anticorrosive properties can be formed by coating the above-mentioned paint composition followed by heating at a temperature of from 200 to 400 degrees C. | 06-07-2012 |
20120138473 | ZINC PLATING BATH ADDITIVE AND ALKALINE NON-CYANIDE ZINC PLATING BATH - Provided is a zinc plating bath additive enabling the rapid formation of a zinc coating having small variations in the thickness depending on the position on the surface of an object to be plated. The zinc plating bath additive contains a water soluble copolymer having, as the structural units, two amine compounds. | 06-07-2012 |
20120115766 | DEGREASING COMPOSITION AND PRODUCTION METHOD THEREOF - As a method for producing a degreasing composition in the form of a slurry, crystallization of the composition during low-temperature storage being suppressed and the composition being used for preparing a cleaning liquid having little environmental impact, provided is a method including a step of obtaining a slurry by mixing a first liquid and a powdery silicate having a particle diameter ranging from 0.2 mm to 10 mm, wherein the first liquid contains an alkaline component composed of at least one of sodium hydroxide and potassium hydroxide, an alcohol having three or fewer carbon atoms, and water; and the degreasing composition contains, with respect to the total composition, 10 mass % to 60 mass % of the alkaline component, 0.1 mass % to 5 mass % of the alcohol, 1 mass % to 50 mass % of the silicate, and 20 mass % to 50 mass % of water including hydration water of the silicate, and contains no chelating agent. | 05-10-2012 |
20120018053 | COMPOSITION FOR CHEMICAL CONVERSION TREATMENT, AND PROCESS FOR PRODUCING A MEMBER HAVING AN ANTICORROSIVE FILM FORMED FROM THE COMPOSITION - As an acidic liquid composition capable of forming an anticorrosive film having an appearance and corrosion resistance comparable to the anticorrosive film formed by chromate treatment on a substrate which has a metallic surface and a complicated shape, a chromium-free acidic liquid composition for reactive chemical conversion treatment for use in forming an anticorrosive film on a metallic surface is provided, the composition comprising: at least one oxidative substance selected from a nitric ion and hydrogen peroxide; at least one carboxylic acid compound selected from the group consisting of carboxylic acids, carboxylate ions, carboxylates, and derivatives of carboxylic acids; an aluminum-containing substance; a zirconium-containing substance; and a sulfate ion, wherein the composition does not substantially contain an organic film-forming component. The composition may further contain a water-soluble metal-containing substance as a film-forming component, the water-soluble metal-containing substance containing one or more elements selected from the group consisting of V, Fe, Cu, Sn, Mo, W, Ce, Co, Ni, Mg, Ca, Mn, and Li. | 01-26-2012 |
20110210007 | ZINCATE ZINC PLATING BATH - To provide a zincate zinc plating bath capable of efficiently forming a zinc plating film with high brightness and high qualities even at a low current density. The zincate zinc plating bath is used in electroplating for depositing a metal containing at least zinc and forming a zinc plating film. It contains a primary brightener having a function of reducing the size crystals of the metal to be deposited and a plating accelerator containing a heterocyclic compound having a predetermined structure such as 2,5-dimercapto-1,3,4-thiadiazole. | 09-01-2011 |
20110159315 | Finishing Agent and Member Having an Overcoat Formed from the Finishing Agent - A finishing agent, which can provide a chromium-free surface treatment layer for use in forming an overcoat on an oxidation-resistant layer on a substrate, comprises an aluminum-containing substance in the form of at least one of a cation, a salt of the cation, and a coordination compound containing the cation; a zinc-containing substance in the form of at least one of a cation, a salt of the cation, and a coordination compound containing the cation; a chelating agent which is able to form a coordination compound with an aluminum ion; and a film-forming substance containing a first element selected from the group consisting of P, Mo, W, Ce, Mn, Si, Ti, Zr, and V. The preferable chelating agent is citric acid. The finishing agent may further contain an organic binder. | 06-30-2011 |
20110155286 | Composition for Chemical Conversion Treatment and Method of Manufacturing a Member Having a Black Film Formed from the Composition - The present invention provide a composition for a chemical conversion treatment capable of forming a chemical conversion film having both an excellent black appearance such that the L-value of the film is 28 even when the film is formed from the composition which has been aged, and good corrosion resistance. The composition is a water-soluble composition and comprising a trivalent chromium-containing substance, a cobalt-containing substance, a sulfur compound, and an organic phosphonate compound consisting of one or more compounds selected from the group consisting of organic phosphonic acids, ions of organic phosphonic acids, and organic phosphonates, and a nickel-containing substance as needed. It is preferable that the content of the trivalent chromium-containing substance be 1 to 10 g/L in chromium content equivalent, that the content of the cobalt-containing substance be 0.1 to 10 g/L in cobalt content equivalent, that the content of the sulfur compound be 0.1 to 10 g/L, and that the content of the organic phosphonate compound be 0.1 to 20 g/L. When the composition further contains a nickel-containing substance, the content in nickel content equivalent is preferably 0.10 to 10 g/L. | 06-30-2011 |
20110132498 | Composition for Chemical Conversion Treatment and Member Having a Chemical Conversion Film Formed by the Treatment - A chemical conversion treatment solution comprising, based on the total composition, 0.1 g/L to 3.0 g/L of an aqueous cobalt-containing substance in cobalt equivalent, 0.05 g/L to 3.0 g/L of a pyrogallol compound in pyrogallol equivalent, and at least 1.5 g/L of an aqueous trivalent chromium-containing substance in chromium equivalent, the composition being acidic and the ratio of the content of the pyrogallol compound in pyrogallol equivalent to the content of the aqueous cobalt-containing substance in cobalt equivalent being 0.015 to 10, wherein a chemical conversion film formed on the metallic surface of a member by contacting the metallic surface with the composition for chemical conversion treatment has a content of hexavalent chromium of 0.050 μg/cm | 06-09-2011 |
20100285226 | Rust-Proof Paint Composition and Method of Manufacturing a Member Having a Rust-Proof Coating Using the Rust-Proof Paint Composition - A rust-proof coating, which does not contain a hazardous metal such as chromium and is able to form a thin coating in which crack generation is inhibited even after a baking treatment at a high temperature, including based on the whole composition, 5 to 40% by weight of an organic silicon compound, 0.05 to 5.0% by weight of an organic titanium compound, 20 to 60% by weight of one or more metal powders selected from the group of zinc powder, zinc alloy powder, and aluminum powder, and 10 to 60% by weight of an organic solvent. A coating having excellent anticorrosive properties can be formed by coating the above-mentioned paint composition followed by heating at a temperature of from 200 to 400 degrees C. | 11-11-2010 |
20100212542 | Composition for Chemical Conversion Treatment and Member Having a Chemical Conversion Coating Formed by the Treatment - The object of this present invention is to provide novel means for inhibiting elution of hexavalent chromium from a chemical conversion coating. A composition for chemical conversion treatment comprises at least 0.1 g/L of a polyphenol and at least 1.5 g/L in chromium ion equivalent of an aqueous trivalent chromium compound and has a pH of 6 or less. A chemical conversion coating formed on a metallic surface of a member by contacting the surface with the composition for chemical conversion treatment has a hexavalent chromium content of 0.04 μg/cm | 08-26-2010 |
20100151257 | Member Having an Anticorrosive Coating, Method of Manufacturing the Member, and Paint Composition for Manufacturing the Member - A coating film capable of attaining excellent corrosion resistance which is provided with both the first coat formed on a member having a metal surface by heating the first coating composition which comprises, based on the whole composition, 5 to 40% by mass of an organosilicon compound, 0.05 to 5.0% by mass of an organotitanate compound, 20 to 60% by mass of one or more metal powders selected from the group consisting of zinc powder, zinc alloy powders and aluminum powder, and 10 to 60% by mass of an organic solvent in such a way to cover the surface including the metal surface and the second coat formed on the first coat by heating the second coating composition which is an aqueous one comprising, based on the whole composition, 5 to 16% by mass of a silane coupling agent and 30 to 60% by mass of an alkali silicate. | 06-17-2010 |