Patents by Inventor Yoshio Kikuta
Yoshio Kikuta 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: 6586496Abstract: A photo-curable resin composition for sealing material, which is superior in the photo-curing performance and in the prompt curing property and is better in the adhesive property, in the resistance to moisture permeation and in the heat resistance, the photo-curable resin composition comprising (A) a compound having oxetane ring, (B) a photoinitiator for cationic polymerization and (C) a silane coupling agent, wherein the composition has a viscosity in the range from 0.01 to 300 Pa.s at 25° C.Type: GrantFiled: March 23, 2001Date of Patent: July 1, 2003Assignee: Mitsui Chemicals, Inc.Inventors: Yasushi Takamatsu, Kei Nagata, Masahiro Ota, Yasushi Mizuta, Yoshio Kikuta
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Publication number: 20030062125Abstract: The photocationic-curable resin composition of the invention comprises (A) a cationic-polymerizable compound, (B) a photocationic initiator and (C) an aromatic ether compound or an aliphatic thioether compound. The photocationic-curable resin composition has excellent conversion (curability) at low temperatures, and its cured product exhibits excellent adhesive strength and moisture permeation resistance. According to the sealing material comprising the composition, a liquid crystal display or an electroluminescent display having excellent adhesive strength and moisture permeation resistance can be provided with high productivity.Type: ApplicationFiled: July 16, 2002Publication date: April 3, 2003Inventors: Yasushi Takamatsu, Yugo Yamamoto, Toshiaki Kuwatsuka, Shuhei Ikado, Yasushi Mizuta, Yoshio Kikuta
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Patent number: 6388012Abstract: A thermosetting powder paint composition comprising (A) a resin composition component, (B) a hardener component and (C) a solid flow controlling component, wherein the component (A) contains a resin composition component having reactivity with the component (B), the component (B) contains a hardener having reactivity with the component (A), the component (C) contains a vinyl polymer which is solid at 20° C., and the relation between SPA of the component (A) and SPC of the component (C) satisfies the following numerical formula (1) and the following numerical formula (2) simultaneously. By this constitution, excellent blocking-resistance in storing as the powder paint composition and excellent appearance properties of a paint film formed by coating the powder paint composition can be simultaneously manifested. 8≦SPA≦13 (1) 7≦SPC≦SPA (2).Type: GrantFiled: April 4, 2000Date of Patent: May 14, 2002Assignee: Mitsui Chemicals, Inc.Inventors: Hiroyuki Sakayama, Yoshio Kikuta, Mitsuyuki Mizoguchi, Takahisa Miyawaki, Tsuyoshi Matsumoto
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Patent number: 6359067Abstract: A thermosetting powder coating composition which comprises a resin composition (A) having a sea-island type microphase separation structure constituted of a continuous phase (a sea phase) comprising an acrylic copolymer and a dispersion phase (an island phase) comprising a thermoplastic elastomer and a curing agent (B) and in which the total amount of a thermosetting elastomer (a-2) constituting the dispersion phase is in the range of 0.5 to 20 parts by weight with respect to 100 parts by weight of the resin composition (A). This powder coating composition is excellent in chipping resistance, impact resistance, weathering resistance and appearance properties, and it is particularly suitable for the coating of vehicles.Type: GrantFiled: December 23, 1999Date of Patent: March 19, 2002Assignee: Mitsui Chemicals, Inc.Inventors: Takahisa Miyawaki, Yoshio Kikuta, Mitsuyuki Mizoguchi, Hiroyuki Sakayama, Tsuyoshi Matsumoto
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Patent number: 6333380Abstract: There are disclosed a thermosetting resin composition for a powder paint in which a resin composition component (A) is a (block) copolymer obtained by allowing a vinyl-based polymer G (branch) block (component (a-1)) to graft-react with a vinyl-based polymer S (back bone) block (component (a-2)), and if the solubility parameters of the components (a-1) and (a-2) are represented by SPG and SPG, respectively, SPG and SPS satisfy the following numerical formula (I), and a thermosetting powder paint composition comprising a resin composition component (A) and a hardener composition component (B) wherein the component (A) is said thermosetting resin composition for a powder paint. By these compositions, a thermosetting powder paint composition having excellent storage stabilities, appearance properties, physical properties and chemical properties can be provided.Type: GrantFiled: February 2, 2000Date of Patent: December 25, 2001Assignee: Mitsui Chemicals, Inc.Inventors: Hiroyuki Sakayama, Yoshio Kikuta, Mitsuyuki Mizoguchi, Takahisa Miyawaki, Tsuyoshi Matsumoto
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Patent number: 6121378Abstract: A thermosetting powder paint composition for top coating excellent in weather resistance and storage stability, which comprising 100 parts by weight of an acrylic copolymer (A) having an epoxy group, and 0.01 to 2.0 parts by weight of an organic modified polysiloxane (B) containing at least one functional group, at least two silicon atoms and no radical-polymerizable unsaturated bond wherein the component (B) is contained in the condition that a part or all thereof has reacted and bonded with the component (A) or the component (C), or all thereof has not reacted with them.Type: GrantFiled: August 19, 1998Date of Patent: September 19, 2000Assignee: Mitsui Chemicals, Inc.Inventors: Takahisa Miyawaki, Yoshio Kikuta, Mitsuyuki Mizoguchi, Hiroyuki Sakayama, Tsuyoshi Matsumoto
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Patent number: 6090892Abstract: Disclosed herein are a (co)polymer comprising, as an essential component, a (co)polymer containing a recurring unit in a predetermined proportion, and its production process. The recurring unit contains a specific amido group and/or a particular hydroxyl group as a pendant group. This (co)polymer is generally obtained in the form of powder and features extremely easy redispersion, and is useful especially as a cement additive for improving physical properties of cement.Type: GrantFiled: July 12, 1996Date of Patent: July 18, 2000Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Tadashi Ishida, Yoshio Kikuta, Futoshi Hoshino, Katsunari Matsumoto
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Patent number: 5429880Abstract: An organic composite coated steel sheet having a high cosmetic corrosion resistance and excellent image clarity which is desired on, for example, the outside of an outer plate forming an automobile body. The steel sheet has a chromate layer formed on the surface of a zinc or a zinc alloy plate steel sheet, and containing a specific weight of chromium, and an organic resin film formed on the chromate layer from a mixture in specific proportions of a blocked urethane-modified epoxy resin and a rust-preventing additive, and having a thickness of 0.2 to 2 microns. The resin is a mixture in specific proportions of a modified epoxy resin (A) which consists of an epoxy resin and a polyfunctional amine, and may further contain a monoisocyanate, or phosphoric acid, and a blocked urethane (B) which consists of a high molecular weight polyol having a molecular weight of 400 or more, a polyisocyanate and a blocking agent. A process for manufacturing the strip is also disclosed.Type: GrantFiled: March 9, 1993Date of Patent: July 4, 1995Assignee: NKK CorporationInventors: Takahiro Kubota, Masaaki Yamashita, Toyofumi Watanabe, Yoshio Kikuta, Kimio Kobori, Hideaki Ogata
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Patent number: 4455360Abstract: An electrophotographic toner comprising a constituent resin and a colorant, in which the constituent resin has a softening point ranging from room temperature to 170.degree. C. and comprises (a) a copolymer of cinnamic acid and one or more vinyl monomers, (b) a mixture of a copolymer as defined in (a) and a polymer having good compatibility therewith, (c) a mixture of a copolymer as defined in (a) and cinnamic acid, (d) a mixture of a polymer as defined in (b) and cinnamic acid, or (e) a mixture of a mixture as defined in (b) and cinnamic acid, the cinnamic acid content of the constituent resin being from 1 to 25 parts by weight per 100 parts by weight of the constituent resin in the case of cinnamic acid copolymerized with one or more vinyl monomers and from 0.1 to 25 parts by weight per 100 parts by weight of the constituent resin in the case of cinnamic acid present in the uncombined state.Type: GrantFiled: May 30, 1980Date of Patent: June 19, 1984Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Koji Ishikawa, Hiroshi Ozawa, Nobuki Kobayashi, Yoshio Kikuta, Kenichi Nakane