Patents Assigned to Rock Paint Co., Ltd.
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Patent number: 8192840Abstract: A spring with high durability has a coating film composed of an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of the coating film. A method of coating a spring with high durability comprises a coating step of making an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of a coating film adhere to a surface on which the coating film is formed, and a baking step of baking the epoxy resin powder coating containing softening agent adhered to the surface.Type: GrantFiled: June 21, 2010Date of Patent: June 5, 2012Assignees: Chuo Hatsujo Kabushiki Kaisha, Rock Paint Co., Ltd.Inventors: Yasuhiko Kunita, Takayuki Sakakibara, Masami Wakita, Yuichi Kondo, Norio Sawatari
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Publication number: 20100255296Abstract: A spring with high durability has a coating film composed of an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of the coating film. A method of coating a spring with high durability comprises a coating step of making an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of a coating film adhere to a surface on which the coating film is formed, and a baking step of baking the epoxy resin powder coating containing softening agent adhered to the surface.Type: ApplicationFiled: June 21, 2010Publication date: October 7, 2010Applicants: Chuo Hatsujo Kabushiki Kaisha, Rock Paint Co., Ltd.Inventors: Yasuhiko KUNITA, Takayuki Sakakibara, Masami Wakita, Yuichi Kondo, Norio Sawatari
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Patent number: 7776440Abstract: A spring with high durability has a coating film composed of an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of the coating film. A method of coating a spring with high durability comprises a coating step of making an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of a coating film adhere to a surface on which the coating film is formed, and a baking step of baking the epoxy resin powder coating containing softening agent adhered to the surface.Type: GrantFiled: January 26, 2007Date of Patent: August 17, 2010Assignees: Chuo Hatsujo Kabushiki Kaisha, Rock Paint Co., Ltd.Inventors: Yasuhiko Kunita, Takayuki Sakakibara, Masami Wakita, Yuichi Kondo, Norio Sawatari
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Publication number: 20070172665Abstract: A spring with high durability has a coating film composed of an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of the coating film. A method of coating a spring with high durability comprises a coating step of making an epoxy resin powder coating containing softening agent which contains an epoxy resin and a softening agent comprising a thermoplastic resin for improving impact resistance of a coating film adhere to a surface on which the coating film is formed, and a baking step of baking the epoxy resin powder coating containing softening agent adhered to the surface.Type: ApplicationFiled: January 26, 2007Publication date: July 26, 2007Applicants: Chuo Hatsujo Kabushiki Kaisha, Rock Paint Co., Ltd.Inventors: Yasuhiko Kunita, Takayuki Sakakibara, Masami Wakita, Yuichi Kondo, Norio Sawatari
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Publication number: 20070116963Abstract: A spring with high durability, which is excellent in corrosion resistance and chipping resistance, is provided. And the coating method for forming such a spring is provided. Dual-layer coating films composed of an undercoat layer and a topcoat layer are formed on a surface of the spring to obtain the spring with high durability, which is excellent in corrosion resistance and chipping resistance. The coating method includes an undercoating step of making an epoxy resin powder coating which contains 75 wt % or more of zinc adhere to the surface of the spring, a topcoating step of making an epoxy polyester resin powder coating adhere to an undercoat film composed of the epoxy resin powder coating, and a baking step of baking the undercoat film and the epoxy polyester resin powder coating adhered thereto.Type: ApplicationFiled: December 7, 2004Publication date: May 24, 2007Applicants: Chuo Hatsujo Kabushiki Kaisha, Rock Paint co., Ltd.Inventor: Takayuki Sakakibara