Patents by Inventor Tetsuro Agawa
Tetsuro Agawa 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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Patent number: 7960475Abstract: A powder coating composition of the present invention includes, as essential components, an epoxy group-containing vinyl copolymer (A) with a glass transition temperature of 40° C. or higher, an epoxy group-containing vinyl copolymer (B) that contains organosiloxane side chains and has a glass transition temperature of 0° C. or lower, and a polyvalent carboxylic acid (C), and is able to form a coating film with excellent external appearance and scratch resistance.Type: GrantFiled: March 9, 2005Date of Patent: June 14, 2011Assignee: DIC CorporationInventors: Naoyuki Seike, Koichi Yamaguchi, Yutaka Furuya, Tetsuro Agawa
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Publication number: 20070240613Abstract: A powder coating composition of the present invention includes, as essential components, an epoxy group-containing vinyl copolymer (A) with a glass transition temperature of 40° C. or higher, an epoxy group-containing vinyl copolymer (B) that contains organosiloxane side chains and has a glass transition temperature of 0° C. or lower, and a polyvalent carboxylic acid (C), and is able to form a coating film with excellent external appearance and scratch resistance.Type: ApplicationFiled: March 9, 2005Publication date: October 18, 2007Applicant: DAINIPPON INK AND CHEMICALS, INC.Inventors: Naoyuki Seike, Koichi Yamaguchi, Yutaka Furuya, Tetsuro Agawa
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Publication number: 20070149755Abstract: This thermosetting powder coating composition is a thermosetting powder coating composition which contains a coating forming component which can crosslink and harden by an ester exchange reaction between a carboxylic ester group and a hydroxyl group, and an ester exchange reaction catalyst, in which the ester exchange reaction catalyst is constituted from an organic sulfonate (X) derived from a carboxylic amide and an organic sulfonic acid having fluorine atoms.Type: ApplicationFiled: December 14, 2004Publication date: June 28, 2007Applicant: Dainippon Ink and Chemicals Inc.Inventors: Yutaka Furuya, Koichi Yamaguchi, Tetsuro Agawa, Kazuo Yamamura
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Patent number: 6914087Abstract: A powder coating is provided which does not require a long complicated production process, can be produced easily and with no danger of gelling occurring during production, and which forms a paint film with superior smoothness and with no film defects such as bubbles or pinholes. A powder coating raw materials solution comprising as essential constituents a room temperature solid main constituent resin (A) with a curable reactive group, a room temperature solid curing agent (B) which reacts with the curable reactive group of the main constituent resin (A), and an organic solvent (C), is spray dried at a temperature at which the main constituent resin (A) and the curing agent (B) undergo no substantial curing reaction.Type: GrantFiled: March 29, 2001Date of Patent: July 5, 2005Assignees: Dainippon Ink and Chemicals, Inc., Liquid Gas Co., Ltd.Inventors: Katsuhiko Okada, Tetsuro Agawa, Kouji Shinohara, Yoshitaka Konishi
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Patent number: 6844397Abstract: The present invention provides a powder coating composition, which can ensure excellent smoothness, scratch resistance, water resistance and humidity resistance, when formed into a thin film, and a coating film forming method. The powder coating composition contains an epoxy group-containing vinyl copolymer (A) having a glass transition temperature of 40° C. or higher and a number-average molecular weight of 1,000 to 2,500, an epoxy group-containing vinyl copolymer (B) having a glass transition temperature of 0° C. or lower, and a polycarboxylic acid (C). 30 to 90% by weight of a polymerization unit of the epoxy group-containing vinyl copolymer (B) originates in a methacrylic acid alkyl ester (b-1) which has an alkyl group having 8 or more carbon atoms.Type: GrantFiled: May 13, 2002Date of Patent: January 18, 2005Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Naoyuki Seike, Koichi Yamaguchi, Katsuhiko Okada, Tetsuro Agawa
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Patent number: 6710137Abstract: The present invention provides a resin composition for a powder coating, which can form a coating film having superior appearance, superior flexibility and superior weatherability while maintaining the storage stability of the coating, and to provide a powder coating and an article coated therewith. The resin composition comprises a polyester resin (A) having a hydroxyl group or having a hydroxyl group and an acid group, isophthalic acid accounting for 50 mol % or more of a polycarboxylic acid unit constituting the polyester resin; a crystalline polyurethane resin (B); and a curing agent (C-1) made of a compound having a functional group reactive with the hydroxyl group or a combination of a curing agent (C-1) made of a compound having a functional group reactive with the hydroxyl group and a curing agent (C-2) made of a compound having a functional group reactive with the acid group.Type: GrantFiled: February 1, 2002Date of Patent: March 23, 2004Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Akira Matsumoto, Tetsuro Agawa
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Thermosetting powder coating composition, method of preparation thereof and coated article therewith
Patent number: 6649267Abstract: A thermosetting powder coating composition has an average particle diameter of entire particles is within a range from 5 to 50 &mgr;m, an average circularity of the particles is 0.90 or more, and a circularity of particles having a maximum number frequency in circularity distribution is within a range from 0.98 to 1.00, prepared by spray-drying an organic solvent solution containing, as a coating film forming component, an epoxy group-containing vinyl copolymer (A) having a glass transition temperature of 40° C. or higher, an epoxy group-containing vinyl copolymer (B) having a glass transition temperature of 0° C. or lower and a polycarboxylic acid (C) as an essential component.Type: GrantFiled: June 11, 2002Date of Patent: November 18, 2003Assignees: Dainippon Ink and Chemicals, Inc., Liquid Gas Co., Ltd.Inventors: Tetsuro Agawa, Katsuhiko Okada, Hiroo Tanaka, Masaya Hashimoto, Takaaki Asakura -
Publication number: 20030211326Abstract: The present invention provides a powder coating composition, which can ensure excellent smoothness, scratch resistance, water resistance and humidity resistance, when formed into a thin film, and a coating film forming method. The powder coating composition contains an epoxy group-containing vinyl copolymer (A) having a glass transition temperature of 40° C. or higher and a number-average molecular weight of 1,000 to 2,500, an epoxy group-containing vinyl copolymer (B) having a glass transition temperature of 0° C. or lower, and a polycarboxylic acid (C). 30 to 90% by weight of a polymerization unit of the epoxy group-containing vinyl copolymer (B) originates in a methacrylic acid alkyl ester (b-1) which has an alkyl group having 8 or more carbon atoms.Type: ApplicationFiled: May 13, 2002Publication date: November 13, 2003Applicant: Dainippon Ink and Chemicals, Inc.Inventors: Naoyuki Seike, Koichi Yamaguchi, Katsuhiko Okada, Tetsuro Agawa
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Patent number: 6613840Abstract: A resin composition for a powder coating, which comprises a non-crystalline polyester resin (A) having a carboxyl group, a crystalline polyester polyurethane resin (B) and a curing agent (C) made of a compound having a functional group reactable with the carboxyl group as an essential component, yields a powder coating which is highly suitable for practical use, the powder coating having superior storage stability (blocking resistance) and forming a coating film having superior smoothness under low temperature curing conditions.Type: GrantFiled: December 13, 2001Date of Patent: September 2, 2003Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Hiroyuki Itou, Tetsuro Agawa
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Publication number: 20030083402Abstract: A powder coating is provided which does not require a long complicated production process, can be produced easily and with no danger of gelling occurring during production, and which forms a paint film with superior smoothness and with no film defects such as bubbles or pinholes. A powder coating raw materials solution comprising as essential constituents a room temperature solid main constituent resin (A) with a curable reactive group, a room temperature solid curing agent (B) which reacts with the curable reactive group of the main constituent resin (A), and an organic solvent (C), is spray dried at a temperature at which the main constituent resin (A) and the curing agent (B) undergo no substantial curing reaction.Type: ApplicationFiled: November 27, 2001Publication date: May 1, 2003Inventors: Katsuhiko Okada, Tetsuro Agawa, Kouji Shinohara, Yoshitaka Konishi
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Thermosetting powder coating composition, method of preparation thereof and coated article therewith
Publication number: 20030026993Abstract: A thermosetting powder coating composition has an average particle diameter of entire particles is within a range from 5 to 50 &mgr;m, an average circularity of the particles is 0.90 or more, and a circularity of particles having a maximum number frequency in circularity distribution is within a range from 0.98 to 1.00, prepared by spray-drying an organic solvent solution containing, as a coating film forming component, an epoxy group-containing vinyl copolymer (A) having a glass transition temperature of 40° C. or higher, an epoxy group-containing vinyl copolymer (B) having a glass transition temperature of 0° C. or lower and a polycarboxylic acid (C) as an essential component.Type: ApplicationFiled: June 11, 2002Publication date: February 6, 2003Applicant: Dainippon Ink and Chemicals, Inc.Inventors: Tetsuro Agawa, Katsuhiko Okada, Hiroo Tanaka, Masaya Hashimoto, Takaaki Asakura -
Patent number: 6515046Abstract: A method of manufacturing a powder coating is provided which does not require a long complicated process, which enables the paint to be manufactured easily and with good conservation of energy, and moreover is free of any danger of gelling during the manufacturing process. The powder coating is manufactured by spray drying a powder coating raw materials solution comprising, as essential constituents, an epoxy group containing acrylic resin (A), a polyvalent carboxylic acid (B), and an organic solvent (C) incorporating an alcohol (C-1) of 2 to 4 carbon atoms, at a temperature at which the epoxy group containing acrylic resin (A) and the polyvalent carboxylic acid (B) undergo no substantial curing reaction.Type: GrantFiled: April 9, 2001Date of Patent: February 4, 2003Assignees: Dainippon Ink and Chemicals, Inc., Liquid Gas Co., Ltd.Inventors: Katsuhiko Okada, Tetsuro Agawa
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Publication number: 20020156226Abstract: The present invention provides a resin composition for a powder coating, which can form a coating film having superior appearance, superior flexibility and superior weatherability while maintaining the storage stability of the coating, and to provide a powder coating and an article coated therewith. The resin composition comprises a polyester resin (A) having a hydroxyl group or having a hydroxyl group and an acid group, isophthalic acid accounting for 50 mol % or more of a polycarboxylic acid unit constituting the polyester resin; a crystalline polyurethane resin (B); and a curing agent (C-1) made of a compound having a functional group reactive with the hydroxyl group or a combination of a curing agent (C-1) made of a compound having a functional group reactive with the hydroxyl group and a curing agent (C-2) made of a compound having a functional group reactive with the acid group.Type: ApplicationFiled: February 1, 2002Publication date: October 24, 2002Applicant: Dainippon Ink and Chemicals, Inc.Inventors: Akira Matsumoto, Tetsuro Agawa
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Publication number: 20020114953Abstract: A resin composition for a powder coating, which comprises a non-crystalline polyester resin (A) having a carboxyl group, a crystalline polyester polyurethane resin (B) and a curing agent (C) made of a compound having a functional group reactable with the carboxyl group as an essential component, yields a powder coating which is highly suitable for practical use, the powder coating having superior storage stability (blocking resistance) and forming a coating film having superior smoothness under low temperature curing conditions.Type: ApplicationFiled: December 13, 2001Publication date: August 22, 2002Applicant: Dainippon Ink and Chemicals, Inc.Inventors: Hiroyuki Itou, Tetsuro Agawa
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Publication number: 20020028866Abstract: A method of manufacturing a powder coating is provided which does not require a long complicated process, which enables the paint to be manufactured easily and with good conservation of energy, and moreover is free of any danger of gelling during the manufacturing process. The powder coating is manufactured by spray drying a powder coating raw materials solution comprising, as essential constituents, an epoxy group containing acrylic resin (A), a polyvalent carboxylic acid (B), and an organic solvent (C) incorporating an alcohol (C-1) of 2 to 4 carbon atoms, at a temperature at which the epoxy group containing acrylic resin (A) and the polyvalent carboxylic acid (B) undergo no substantial curing reaction.Type: ApplicationFiled: April 9, 2001Publication date: March 7, 2002Inventors: Katsuhiko Okada, Tetsuro Agawa
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Patent number: 6090890Abstract: Resin composition for powder paints, that has an excellent curability and excellent electrostatic properties (wraparound) and that provides cured coatings having an excellent appearance, weathering resistance, and mechanical properties, comprising (A) epoxy-functional branched organopolysiloxane and (B) a compound bearing a functional group reactive with the epoxy group, wherein the component (A)/component (B) weight ratio is from 2/98 to 98/2, or comprising (A) epoxy-functional branched organopolysiloxane, (3) a compound bearing a functional group reactive with the epoxy group, and (C) a compound bearing a functional group reactive with the functional group in component (B), wherein the component (A)/(component (B)+component (C)) weight ratio is from 2/98 to 98/2.Type: GrantFiled: August 13, 1996Date of Patent: July 18, 2000Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Ichiro Murakami, Shoji Akamatsu, Tetsuro Agawa