Patents Assigned to Dipsol Chemicals Co., Ltd.
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Publication number: 20240384110Abstract: The present invention addresses the problem of providing: a top coating agent which forms a protective film demonstrating a beautiful silvery-white appearance, can be adjusted to suppress increases in the friction coefficient even when heat-treated at a high temperature, stabilizes sliding, is strong, and has excellent water resistance, corrosion resistance, and the like; and a fastening member having the protective film formed using said top coating agent. The present invention provides: a top coating agent that includes a polyoxyalkylene amine-based surfactant, a water-soluble modified organopolysiloxane, aluminum flake, and a diluent containing water; and a silvery-white fastening member having a protective film formed using said top coating agent.Type: ApplicationFiled: April 1, 2021Publication date: November 21, 2024Applicants: DIPSOL CHEMICALS CO., LTD., HONDA MOTOR CO., LTD.Inventors: Satoshi TAKAMATSU, Hiroshi HIRAYAMA, Mayuko SAKASHITA, Yoshiki ASAKA, Bo TONG, Shinsuke MOCHIZUKI, Atsushi MURAKAMI, Hiroyuki YOSHIDA
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Publication number: 20240337041Abstract: The present invention aims to provide an anode for electroplating that can be relatively easily manufactured without the need for ancillary facilities or anolyte management, and without requiring expensive or special metals.Type: ApplicationFiled: November 17, 2023Publication date: October 10, 2024Applicant: Dipsol Chemicals Co., Ltd.Inventors: Kota KOBAYASHI, Nobuya Sugaya
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Patent number: 11987888Abstract: An object is to provide a trivalent chromium chemical conversion treatment liquid for a zinc or zinc alloy base capable of forming an environmentally-friendly chemical conversion coating with high corrosion resistance. The present invention provides a hexavalent chromium-free trivalent chromium chemical conversion treatment liquid for zinc or zinc alloy, the liquid comprising trivalent chromium ions, zirconium ions, nitrate ions, and chain colloidal silica, in which the pH of the treatment liquid is 2.5 to 5.0.Type: GrantFiled: August 16, 2022Date of Patent: May 21, 2024Assignee: Dipsol Chemicals Co., Ltd.Inventors: Ryouji Iwanaga, Manabu Inoue, Tomitaka Yamamoto, Takahiro Fujino
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Publication number: 20230349063Abstract: An object of the present invention is to provide a method and system of electroplating using an anode that can be prepared relatively easily without the need for ancillary equipment or anolyte management, and without the need for expensive metals or special metals. The present invention relates to a method of electroplating an article with metal, the method comprising the steps of: allowing a current to flow in a plating bath containing ions of the metal and an organic compound additive, wherein the plating bath comprises the article as a cathode and a conductive base material as an anode, a part of a surface of the conductive base material is covered with an insulating material, and a remaining part is exposed, and a current flowing portion is dispersedly present in the anode.Type: ApplicationFiled: January 21, 2022Publication date: November 2, 2023Applicant: DIPSOL CHEMICALS CO., LTD.Inventors: Toshihiro NIIKURA, Alec CHAFFEE, Tarek NAHLAWI, Shuntaro TSUKIYAMA
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Publication number: 20230304160Abstract: The present invention addresses the problem of providing a chemical conversion treatment solution that contains zirconium ions and that makes it possible to form a highly corrosion-resistant chemical conversion coating formed with consideration for the environment as well. The present invention provides a chemical conversion treatment solution that contains trivalent chromium ions, zirconium ions, aluminum ions, at least one type of carboxylic acid ions, and at least one type of silicon compound, the chemical conversion treatment solution being free of fluorine ions and fluorine compounds.Type: ApplicationFiled: July 19, 2021Publication date: September 28, 2023Applicant: DIPSOL CHEMICALS CO., LTD.Inventors: Ryuta KASHIO, Masatoshi ISHIKAWA, Tomitaka YAMAMOTO
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Patent number: 11643732Abstract: A trivalent-chromium chemical conversion coating from which substantially no hexavalent chromium is released. The trivalent-chromium chemical conversion coating is one formed on the surface of a zinc or zinc-alloy deposit. In a brine spray test, the chemical conversion coating has unsusceptibility to corrosion (time required for white-rust formation) of 96 hours or longer. The chemical conversion coating has a hexavalent-chromium concentration less than 0.01 ?g/cm2 in terms of metal atom amount. The amount of hexavalent chromium released after 30-day standing in a thermo-hygrostatic chamber at a temperature of 80° C. and a humidity of 95% (amount of hexavalent chromium released when the coating is immersed in 100° C. water for 10 minutes) is smaller than 0.05 ?g/cm2.Type: GrantFiled: April 26, 2017Date of Patent: May 9, 2023Assignee: Dipsol Chemicals Co., Ltd.Inventors: Manabu Inoue, Kimitaka Watanabe, Go Nagata, Motoi Nakatani, Keita Ishizu, Toshiki Inomata
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Publication number: 20230041195Abstract: The purpose of the present invention is to provide a zinc-nickel-silica composite plating bath that has been improved in terms of: covering power for articles having a complex shape; and corrosion resistance of a low current density portion where the film thickness is small. The present invention pertains to a zinc-nickel-silica composite plating bath, the plating bath having a pH of 3.5 to 6.9, and containing zinc ions, nickel ions, colloidal silica, and chloride ions. The colloidal silica is a cationic colloidal silica having on the surface thereon at least one species of metal cation selected from the group consisting of trivalent to heptavalent metal cations.Type: ApplicationFiled: November 5, 2020Publication date: February 9, 2023Applicant: DIPSOL CHEMICALS CO., LTD.Inventors: Masayoshi MIKAMI, Manabu INOUE
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Publication number: 20220396884Abstract: An object is to provide a trivalent chromium chemical conversion treatment liquid for a zinc or zinc alloy base capable of forming an environmentally-friendly chemical conversion coating with high corrosion resistance. The present invention provides a hexavalent chromium-free trivalent chromium chemical conversion treatment liquid for zinc or zinc alloy, the liquid comprising trivalent chromium ions, zirconium ions, nitrate ions, and chain colloidal silica, in which the pH of the treatment liquid is 2.5 to 5.0.Type: ApplicationFiled: August 16, 2022Publication date: December 15, 2022Applicant: DIPSOL CHEMICALS CO., LTD.Inventors: Ryouji IWANAGA, Manabu INOUE, Tomitaka YAMAMOTO, Takahiro FUJINO
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Patent number: 11008659Abstract: The present invention provides a chemical conversion liquid for zinc or zinc alloy bases, which contains 2-200 mmol/L of trivalent chromium ions, 1-300 mmol/L of zirconium ions and at least one component selected from among fluorine ions, a water-soluble carboxylic acid and a salt thereof, and which does not contain Co ions and hexavalent chromium ions.Type: GrantFiled: December 25, 2015Date of Patent: May 18, 2021Assignee: DIPSOL CHEMICALS CO., LTD.Inventors: Ayumi Saito, Masatoshi Ishikawa, Takashi Koike
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Patent number: 10538854Abstract: Provided is a copper-nickel alloy electroplating apparatus which is capable of stably forming a copper-nickel plated coating on a workpiece with a uniform composition and which enables a plating bath to be used for a long period. The present invention provides a copper-nickel alloy electroplating apparatus (1), comprising: a cathode chamber (4) in which a workpiece (5) is to be placed; an anode chamber (6); an anode (7) placed in the anode chamber; an electrically conductive diaphragm (14) placed to separate the cathode chamber and the anode chamber from each other; a cathode chamber oxidation-reduction potential adjusting tank (8) for adjusting the oxidation-reduction potential of a plating liquid in the cathode chamber; an anode chamber oxidation-reduction potential adjusting tank (10) for adjusting the oxidation-reduction potential of a plating liquid in the anode chamber; and a power supply unit (36) that provides an electric current to flow between the workpiece and the anode.Type: GrantFiled: June 25, 2015Date of Patent: January 21, 2020Assignee: DIPSOL CHEMICALS CO., LTD.Inventors: Hitoshi Sakurai, Kazunori Ono, Akira Hashimoto, Satoshi Yuasa
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Patent number: 10316421Abstract: The present invention provides a copper-nickel alloy electroplating bath which contains (a) a copper salt and a nickel salt, (b) a metal complexing agent, (c) a conductivity imparting agent, (d) a sulfur-containing organic compound and (e) a redox potential regulator.Type: GrantFiled: July 10, 2015Date of Patent: June 11, 2019Assignee: DIPSOL CHEMICALS CO., LTD.Inventors: Hitoshi Sakurai, Kazunori Ono, AKira Hashimoto, Satoshi Yuasa
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Patent number: 10309025Abstract: The purpose of the present invention is to provide an electrical Al plating bath that poses little danger of exploding or igniting as a result of contacting air or water, and contains no benzene, toluene, xylene, naphthalene, or 1,3,5-trimethylbenzene, which have detrimental effects to humans. The present invention provides an electrical aluminum or aluminum alloy fused salt plating bath that is obtained by heat treatment of an electrical aluminum or aluminum alloy fused salt plating bath containing (A) a halogenated aluminum as the primary component and (B) at least one other type of halide after adding (C) one, two or more reducible compounds selected from the group consisting of hydrides of elements in Group 1 Periods 2 through 6 of the Periodic Table of Elements and/or hydrides of Group 13 Periods 2 through 6 of the Periodic Table of Elements and amine borane compounds.Type: GrantFiled: February 9, 2018Date of Patent: June 4, 2019Assignee: DIPSOL CHEMICALS CO., LTD.Inventors: Manabu Inoue, Akira Hashimoto, Tadahiro Onuma, Toshiki Inomata, Keisuke Nonomura, Naruaki Konno
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Patent number: 10240237Abstract: Provided is a black coupling member for vehicles, comprising a trivalent chromium black chemical conversion film and a black coating film upon the trivalent chromium black chemical conversion film, on the surface of a zinc-plated metal substrate. The trivalent chromium black chemical conversion film is formed using a hexavalent chromium-free trivalent chromium black chemical conversion treatment solution having a Zn ion concentration of no more than 20 g/L. The lightness (L) of the trivalent chromium black chemical conversion film is no more than 33. The black coating film includes a black chemical conversion component, a modified organopolysiloxane, and a friction coefficient-adjustment component. The black chemical conversion component content is 2-25 wt % relative to 100 wt % of the black coating film. The lightness (L) is no more than 28.Type: GrantFiled: August 19, 2014Date of Patent: March 26, 2019Assignees: DIPSOL CHEMICALS CO., LTD., HONDA MOTOR CO., LTD.Inventors: Yasuhiro Kato, Toshiki Inomata, Manabu Inoue, Hiroyuki Yoshida, Hiroshi Hirayama, Shinsuke Mochizuki, Toshiyasu Nagai
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Patent number: 10156020Abstract: The present invention provides a zinc alloy electroplating method comprising applying a current through an alkaline zinc alloy electroplating bath comprising a cathode and an anode, wherein a cathode region including the cathode and an anode region including the anode are separated from each other by an anion exchange membrane, a catholyte contained in the cathode region is an alkaline zinc alloy plating liquid, and an anolyte contained in the anode region is an aqueous alkaline solution.Type: GrantFiled: July 22, 2015Date of Patent: December 18, 2018Assignee: DIPSOL CHEMICALS CO., LTD.Inventors: Toshihiro Niikura, Takahiro Fujimori, Akira Hashimoto, Manabu Inoue
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Patent number: 10023968Abstract: Disclosed is an electric Al—Zr alloy plating bath containing an aluminum halide (A), one or more compounds (B) selected from the group consisting of N-alkylpyridinium halides, N-alkylimidazolium halides, N,N?-alkylimidazolium halides, N-alkylpyrazolium halides and N,N?-alkylpyrazolium halides, and a zirconium halide (C). The molar ratio between the aluminum halide (A) and the compounds (B) is from 1:1 to 3:1. The electric Al—Zr alloy plating bath further contains an aromatic organic solvent (D), an organic polymer (E) and one or more additives (F) selected from brightening agents.Type: GrantFiled: February 8, 2008Date of Patent: July 17, 2018Assignees: Dipsol Chemicals Co., Ltd., Honda Motor Co., Ltd.Inventors: Manabu Inoue, Tadahiro Ohnuma, Tsutomu Miyadera
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Patent number: 9926638Abstract: The purpose of the present invention is to provide an electrical Al plating bath that poses little danger of exploding or igniting as a result of contacting air or water, and contains no benzene, toluene, xylene, naphthalene, or 1,3,5-trimethylbenzene, which have detrimental effects to humans. The present invention provides an electrical aluminum or aluminum alloy fused salt plating bath that is obtained by heat treatment of an electrical aluminum or aluminum alloy fused salt plating bath containing (A) a halogenated aluminum as the primary component and (B) at least one other type of halide after adding (C) one, two or more reducible compounds selected from the group consisting of hydrides of elements in Group 1 Periods 2 through 6 of the Periodic Table of Elements and/or hydrides of Group 13 Periods 2 through 6 of the Periodic Table of Elements and amine borane compounds.Type: GrantFiled: January 4, 2012Date of Patent: March 27, 2018Assignee: DIPSOL CHEMICALS CO., LTD.Inventors: Manabu Inoue, Akira Hashimoto, Tadahiro Onuma, Toshiki Inomata, Keisuke Nonomura, Naruaki Konno
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Patent number: 9903038Abstract: The present invention provides a zinc alloy electroplating method comprising applying a current through an alkaline zinc alloy electroplating bath comprising a cathode and an anode, wherein a cathode region including the cathode and an anode region including the anode are separated from each other by a separator comprising an electrically conductive electrolyte gel.Type: GrantFiled: July 22, 2015Date of Patent: February 27, 2018Assignee: DIPSOL CHEMICALS CO., LTD.Inventors: Toshihiro Niikura, Hirofumi Shiga, Manabu Inoue
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Patent number: 9828686Abstract: The present invention provides a copper-nickel alloy electroplating bath which is characterized by containing (a) a copper salt and a nickel salt, (b) a metal complexing agent, (c) a plurality of conductivity-imparting salts that are different from each other, (d) a compound that is selected from the group consisting of disulfide compounds, sulfur-containing amino acids and salts of these compounds, (e) a compound that is selected from the group consisting of sulfonic acid compounds, sulfimide compounds, sulfamic acid compounds, sulfone amides and salts of these compounds, and (f) a reaction product of a glycidyl ether and a polyhydric alcohol. This copper-nickel alloy electroplating bath is also characterized by having a pH of 3-8.Type: GrantFiled: April 19, 2013Date of Patent: November 28, 2017Assignee: DIPSOL CHEMICALS CO., LTD.Inventors: Manabu Inoue, Satoshi Yuasa, Hitoshi Sakurai
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Publication number: 20170241030Abstract: Provided herein is an electric Al—Zr—Mn alloy-plating bath which comprises (A) an aluminum halide; (B) one or at least two kinds of compounds selected from the group consisting of N-alkylpyridinium halides, N-alkylimidazolium halides, N,N?-dialkyl-imidazolium halides, N-alkyl-pyrazolium halides, N,N?-dialkyl-pyrazolium halides, N-alkylpyrrolidinium halides and N,N-dialkyl-pyrrolidinium halides; (C) a zirconium halide; and (D) a manganese halide, in which the molar ratio of the aluminum halide (A) to the compound (B) ranges from 1:1 to 3:1. The plating bath never involves any risk of causing an explosion and can provide a smooth and fine Al—Zr—Mn alloy-plated film. Moreover, the resulting film has high resistance to corrosion even when it does not contain any chromium and therefore, it is quite suitable from the viewpoint of the environmental protection and it can thus be used in a wide variety of applications including the plating of parts for motorcars, and the plating of parts for electrical appliances.Type: ApplicationFiled: December 10, 2013Publication date: August 24, 2017Applicants: Honda Motor Co., Ltd., DIPSOL CHEMICALS CO., LTD.Inventors: Manabu Inoue, Tadahiro Ohnuma, Tsutomu Miyadera
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Publication number: 20170241031Abstract: The present invention provides a copper-nickel alloy electroplating bath which contains (a) a copper salt and a nickel salt, (b) a metal complexing agent, (c) a conductivity imparting agent, (d) a sulfur-containing organic compound and (e) a redox potential regulator.Type: ApplicationFiled: July 10, 2015Publication date: August 24, 2017Applicant: Dipsol Chemicals Co., LTD.Inventors: Hitoshi SAKURAI, Kazunori ONO, Akira HASHIMOTO, Satoshi YUASA