Patents by Inventor Kiyotada Yasuhara
Kiyotada Yasuhara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20020174915Abstract: The objective of the present invention is to impart coating film adhesion, corrosion resistance and rust prevention to magnesium alloys.Type: ApplicationFiled: March 27, 2002Publication date: November 28, 2002Applicant: NIPPON PAINT CO., LTD.Inventors: Masanobu Futsuhara, Satoshi Miyamoto, Katsuyoshi Yamasoe, Kiyotada Yasuhara
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Patent number: 6388021Abstract: A metal surface treatment composition is provided which improves corrosion resistance and film adhesion, and confers slip properties. This composition is an acrylic resin-containing metal surface treatment composition which is water-soluble, water-dispersible or emulsifiable, which comprises an acrylic resin, this resin comprising either or both of an amino group and an ammonium group together with a hydroxyl group and a hydrophobic group, and which further comprises a heavy metal or one of its salts.Type: GrantFiled: April 14, 1999Date of Patent: May 14, 2002Assignee: Nippon Paint Co., Ltd.Inventors: Yasuhiro Shibata, Tomoyuki Kanda, Atsuhiko Tounaka, Susumu Maekawa, Kiyotada Yasuhara
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Patent number: 6146473Abstract: A metal surface treatment composition which can improve the corrosion resistance and the tight adhesion to coating films and impart slipperiness. The composition is an aqueous solution, dispersion or emulsion containing both an acrylic resin having nitrogenous heterocycles, amino and/or ammonium groups and hydrophobic groups and a heavy metal or a salt thereof. The amino or ammonium groups have at least one structure selected from among those represented by general formulae (I) (wherein in R.sub.1, R.sub.2 : hydrogen, hydroxyl, substituted or unsubstituted, linear or branched C.sub.1 -C.sub.5 alkyl, or substituted or unsubstituted, linear or branched C.sub.1 -C.sub.5 hydroxyalkyl) and (II) (wherein R.sub.3, R.sub.4, R.sub.5 : hydrogen, hydroxyl, substituted or unsubstituted, linear or branched C.sub.1 -C.sub.5 alkyl, or substituted or unsubstituted, linear or branched C.sub.1 -C.sub.5 hydroxyalkyl).Type: GrantFiled: April 12, 1999Date of Patent: November 14, 2000Assignee: Nippon Paint Co., Ltd.Inventors: Yasuhiro Shibata, Tomoyuki Kanda, Atsuhiko Tounaka, Susumu Maekawa, Kiyotada Yasuhara
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Patent number: 6059174Abstract: A flux composition for brazing of an aluminum material which can feed a proper amount of flux to an area to be joined at the time of brazing and at the same time can improve working environment, and a method for brazing of an aluminum material. The method comprises: coating an aluminum material to be joined with a flux composition comprising 0.5 to 25 parts by weight of a polymeric compound having a number average molecular weight of 50000 to 5000000 and comprising repeating alkylene oxide units, 5 to 30 parts by weight of a fluoride flux, and water added in such an amount as will provide a total amount of the composition of 100 parts by weight; heating the coated area to remove water; heating the coated area to decompose and remove the polymeric compound; and then conducting heating for brazing.Type: GrantFiled: February 8, 1999Date of Patent: May 9, 2000Assignees: Showa Aluminum Corporation, Nippon Paint Co., Ltd.Inventors: Masahiro Kojima, Futoshi Watanabe, Atsuhiko Tounaka, Kiyotada Yasuhara, Hiroyuki Nojiri, Katsuyoshi Yamasoe
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Patent number: 6013377Abstract: A surface-treated metal material wherein a film comprising an organic polymer compound having 5-100 mg of carbon per m.sup.2 and a phosphoric acid compound having 1-30 mg of phosphorus per m.sup.2 is formed on a metal surface, the ratio C/P of carbon atoms C to phosphorus atoms P in the film lying within the range 2-25.Type: GrantFiled: June 5, 1997Date of Patent: January 11, 2000Assignee: Nippon Paint Co., Ltd.Inventors: Tomoyuki Kanda, Atsuhiko Tounaka, Yasuhiro Shibata, Toshiaki Shimakura, Kiyotada Yasuhara
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Patent number: 5458917Abstract: In a continuous surface treating method and apparatus with an inline centrifugal separator, an object to be treated is contained in a basket and hung from a hanger of an overhead type and a series of surface treatments of the object is carried out by using a continuous conveyer of a power and free type. By using a hanger attach-detach conveyer, the object is moved from a main conveyer to a sub-conveyer and an excessive treating liquid attached to the object in a previous process is separated by using the centrifugal separator. Then, the object is returned from the sub-conveyer to the main conveyer to perform a next process. The surface treating apparatus includes the rotatable basket for containing the object.Type: GrantFiled: June 18, 1993Date of Patent: October 17, 1995Assignees: Showa Aluminum Corporation, Nippon Paint Co., Ltd.Inventors: Tsutomu Motohashi, Masahiro Kojima, Fujio Mikami, Kiyotada Yasuhara, Kageki Fujimoto
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Patent number: 5350445Abstract: The hydrophilic coating composition including, on a solid basis, (a) 0.3-6 parts by weight of polyvinyl pyrrolidone having a polymerization degree of 10-1000; and (b) 1-10 parts by weight of polyvinyl alcohol having a saponification degree of 80% or more and a polymerization degree of 100-1000, a weight ratio of the component (a) to the component (b), (a)/[(a)+(b)], being in the range of 0.1-0.9.Type: GrantFiled: June 11, 1992Date of Patent: September 27, 1994Assignees: Nippon Paint Co., Ltd., Showa Aluminum CorporationInventors: Fujio Mikami, Kiyotada Yasuhara, Masahiro Kojima, Susumu Inoue
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Patent number: 5248399Abstract: A cleaning agent is used to wash surfaces of aluminum products in a cleaning bath. The cleaning agent is a water-soluble acid containing ferric ions. During the cleaning process, the ferric ions are reduced to ferrous ions. The used cleaning agent is sent to an electrolytic tank so that the ferrous ions are subject to the electrolytic oxidation to be converted into ferric ions. The regenerated cleaning agent is returned to the cleaning bath.Type: GrantFiled: June 5, 1992Date of Patent: September 28, 1993Assignee: Nippon Paint Co., Ltd.Inventors: Shigeyuki Meguro, Kiyotada Yasuhara
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Patent number: 5096958Abstract: A hydrophilic surface treatment chemicals comprising, on a solid basis,(a) 1-10 parts by weight of at least partially saponified polyvinyl acetate having a saponification degree of 45 or more and a polymerization degree of 100-600,(b) 0.3-15 parts by weight of water-soluble nylon, and(c) 0.1-5 parts by weight of a water-soluble amino resin,a weight ratio of the component (b) to the total of the components (a) and (c), (b)/[(a)+(c)], being in the range of 1-1/4, and a weight ratio of the component (a) to the component (c), (a)/(c), being in the range of 1/0.05-1/0.5. The hydrophilic surface treatment bath is prepared by properly diluting the chemicals for surface-treating aluminum members.Type: GrantFiled: August 10, 1990Date of Patent: March 17, 1992Assignee: Nippon Paint Co., Ltd.Inventors: Shigeyuki Meguro, Kiyotada Yasuhara
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Patent number: 4851148Abstract: In chromium-free aqueous acidic washing solutions for cleaning the surfaces of aluminum and aluminum-alloy particles, so as to remove therefrom smut and lubricating oil left on the surfaces thereof after metal forming operations, which solutions contain from 0.2 to 4 g/l ferric ion and sufficient sulfuric and/or nitric acid to impart a pH of 2 or less to the solutionh (and which optionally may also contain fluoride ions up to a concentration of 0.5 g/l) there is provided a method of controlling the effectiveness of the washing solution in which the ferric ion concentration therein is monitored, conveniently by the oxidation-reduction potential of the washing solution, as shown in FIG. 3, and is controlled within the desired limits by adding when appropriate suitable amounts of oxidant capable of oxidizing ferrous ions to ferric ions and, separately or in conjunction therewith, a replenisher containing a source of iron ions.Type: GrantFiled: April 3, 1986Date of Patent: July 25, 1989Assignee: Amchem Products, Inc.Inventors: Katsuyoshi Yamasoe, Satoshi Ikeda, Kiyotada Yasuhara
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Patent number: 4756846Abstract: A degreasing detergent composition for tin surfaces and a method for its use, wherein the composition is an aqueous solution having a pH of 9 to 13 and containing at least one surfactant, at least one alkali metal detergent builder, and at least an alkaline earth metal salt at a concentration of at least 0.003 g/l.Type: GrantFiled: March 9, 1987Date of Patent: July 12, 1988Assignee: Amchem Products, Inc.Inventors: Yasuo Matsuura, Kiyotada Yasuhara, Satoshi Ikeda
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Patent number: 4717497Abstract: A detergent degreasing composition for DI-process tin-plated cans, comprising an alkali metal or ammonium salt of orthophosphoric acid, an alkali metal salt of nitrous acid, an optional surfactant, sufficient of at least one alkali metal salt of carbonic acid to adjust the pH to 9 to 11, and water.Type: GrantFiled: March 8, 1985Date of Patent: January 5, 1988Assignee: Amchem Products, Inc.Inventors: Kiyotada Yasuhara, Masae Adachi
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Patent number: 4338141Abstract: An acidic aqueous zinc-containing coating solution containing about 0.4 to about 1 g/l of zinc, about 5 to about 40 g/l of phosphate, about 2 to about 5 g/l of chlorate, and about 0.01 to about 0.2 g/l of nitrite, and useful for forming on metal surfaces zinc phosphate coatings that exhibit excellent adhesion to a paint film and excellent corrosion resistance after painting when used as an undercoat for the cationic electrodeposition of a paint film, and a process for applying coating composition, including continuous spray or intermittent spray.Type: GrantFiled: May 1, 1980Date of Patent: July 6, 1982Inventors: Takashi Senzaki, Ryoichi Murakami, Kiyotada Yasuhara, Masashi Takahashi
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Patent number: 4311535Abstract: An acidic aqueous zinc-containing coating solution containing about 0.08 to about 0.2 weight percent of zinc, about 0.8 to about 3 weight percent of phosphate, about 0.05 to about 0.35 weight percent of chlorate, about 0.001 to about 0.1 weight percent of nitrite, and a complex fluoride ion having the following concentration:0.4.gtoreq.y.gtoreq.0.63x-0.042wherein x is the concentration of the zinc in weight percent and y is the concentration of the complex fluoride ion in weight percent. The coating solution is useful for forming on metal surfaces zinc phosphate coatings that exhibit excellent alkali resistance, good adhesion to a paint film, and good corrosion resistance after painting when used as an undercoat for the cationic electrodeposition of a paint film.Type: GrantFiled: May 1, 1980Date of Patent: January 19, 1982Inventors: Kiyotada Yasuhara, Masashi Takahashi, Ryoichi Murakami, Takashi Senzaki