Patents by Inventor Takeshi Imahashi
Takeshi Imahashi 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: 8394392Abstract: An antibacterial agent composed of silver-containing aluminum sulfate hydroxide particles represented by the following formula (X-I) or (Y-I). (AgaBb-a)bAlcAx(SO4)y(OH)z.pH2O??(X-I) [AgaBb-a]b[Ti3-cAlc](SO4)y(OH)z.pH2O??(Y-I) The above antibacterial agent of the present invention provides antibacterial molded articles and further antifungal agents, cosmetics, antibacterial paper, antibacterial deodorizing sprays and agricultural chemicals when it is mixed with a resin.Type: GrantFiled: June 30, 2006Date of Patent: March 12, 2013Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Takeshi Imahashi, Xing Dong Wang, Akira Okada, Yoshie Inoue
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Publication number: 20100119565Abstract: The object of this invention is to provide antimicrobial particles that can maintain, for a long period of time, antimicrobial activities in particular the antimicrobial activities after they come in contact with tap water. This invention includes antimicrobial particles formed of a compound of the following formula (1), a process for the preparation thereof and an antimicrobial composition containing the said particles, [AgaB1-a]b[Mn+cAl1-cn/3]dAx(SO4)y(OH)z·pH2O??(1) wherein B is at least one monovalent cation selected from the group consisting of Na+, NH4+, K+ and H3O+, Mn+ is a metal ion composed mainly of Cu2+, n is a valence number of the metal ion and A is an anion mainly composed of an organic acid.Type: ApplicationFiled: December 28, 2007Publication date: May 13, 2010Inventor: Takeshi Imahashi
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Publication number: 20090047311Abstract: An antibacterial agent composed of silver-containing aluminum sulfate hydroxide particles represented by the following formula (X-I) or (Y-I). (AgaBb-a)bAlcAx(SO4)y(OH)z.pH2O??(X-I) [AgaBb-a]b[Ti3-cAlc](SO4)y(OH)z.pH2O??(Y-I) The above antibacterial agent of the present invention provides antibacterial molded articles and further antifungal agents, cosmetics, antibacterial paper, antibacterial deodorizing sprays and agricultural chemicals when it is mixed with a resin.Type: ApplicationFiled: June 30, 2006Publication date: February 19, 2009Inventors: Takeshi Imahashi, Xing Dong Wang, Akira Okada, Yoshie Inoue
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Patent number: 6682801Abstract: The coloring problem of a conventional molded article is overcome while retaining the advantages of high strength and high flame retardancy of the molded article when a metal hydroxide is used in combination with red phosphorus and carbon powder in the method of imparting a synthetic resin with flame retardancy. The molded article can be colored in any color and exhibits decreased lowering of electric insulation resistance when submerged. The molded article comprises a base material colored from dark red to black containing 100 wt parts synthetic resin, 5-200 wt parts metal hydroxide, 1-30 wt parts red phosphorus and 0.1-30 wt parts carbon powder; and a skin layer laminated thereon masking a colored surface of the base wherein the skin layer contains 100 wt parts, 0-100 wt parts pigment, and 0-200 wt parts metal hydroxide, provided that the total amount of pigment and metal hydroxide in the skin layer is at least 0.001 wt parts.Type: GrantFiled: November 26, 1999Date of Patent: January 27, 2004Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Takeshi Imahashi, Makoto Yoshii, Yoshiharu Sawa
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Publication number: 20030162011Abstract: The coloring problem of a conventional molded article is overcome while retaining the advantages of high strength and high flame retardancy of the molded article when a metal hydroxide is used in combination with red phosphorus and a carbon powder in the method of imparting a synthetic resin with flame retardancy.Type: ApplicationFiled: November 26, 1999Publication date: August 28, 2003Inventors: TAKESHI IMAHASHI, MAKOTO YOSHII, YOSHIHARU SAWA
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Patent number: 6291570Abstract: There are provided a flame retardant comprising hydrotalcite compound particles which exhibits excellent heat deterioration resistance when it is used as a flame retardant for resins, a resin composition comprising the same and a molded article thereof. There are also provided a heat deterioration resistant flame retardant comprising hydrotalcite compound particles which (i) have an average secondary particle diameter, measured by a laser diffraction scattering method, of 2 &mgr;m or less and (ii) contain an iron compound and a manganese compound in a total amount of 0.02 wt % or less in terms of metals, a synthetic resin composition comprising the same and a molded article thereof.Type: GrantFiled: December 28, 1999Date of Patent: September 18, 2001Assignee: Kyowa Chemical Industry Co LtdInventors: Keiko Katsuki, Takeshi Imahashi, Akira Okada
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Patent number: 6130282Abstract: A flame retardant resin composition comprising (A) 100 parts by weight of a synthetic resin, (B) 20 to 150 parts by weight of magnesium hydroxide particles and (C) 20 to 150 parts by weight of aluminum hydroxide particles, wherein the magnesium hydroxide particles and the aluminum hydroxide particles satisfy the following conditions (i) to (v): (i) the average secondary particle diameter measured by a microtrack method is 0.4 to 4 .mu.m; (ii) the specific surface measured by a BET method is 1 to 15 m.sup.2 /g; (iii) the total content of an iron compound and a manganese compound is 200 ppm or less in terms of metals (Fe+Mn); (iv) the ratio of the specific surface measured by the BET method to the specific surface measured by a Blaine method is 1 to 4; and (v) the content of a water-soluble sodium salt is 500 ppm or less in terms of metal sodium.Type: GrantFiled: September 29, 1998Date of Patent: October 10, 2000Assignee: Kyowa Chemical Industry Co LtdInventors: Takeshi Imahashi, Keiko Katsuki, Noriko Iijima, Makoto Yoshii
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Patent number: 6107385Abstract: A flame-retardant resin composition, which comprises 100 parts by weight of a synthetic resin having 70 to 100% by weight of metallocene LLDPE, 20 to 100 parts by weight of a magnesium hydroxide having a BET specific surface area of 20 m.sup.2 /g or less, an average secondary particle diameter of 5 .mu.m or less, measured according to a laser diffraction scattering method, and a water-soluble sodium salt content of 500 ppm or less as a sodium, 1 to 20 parts by weight of red phosphorus having an average secondary particle diameter of 30 .mu.m or less and 0.1 to 20 parts by weight of a carbon powder, the total of the magnesium hydroxide, the red phosphorus and the carbon powder being 120 parts by weight or less.Type: GrantFiled: April 27, 1999Date of Patent: August 22, 2000Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Takeshi Imahashi
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Patent number: 6043306Abstract: Provided by the present invention are a flame-retardant thermoplastic resin composition which consists of (a) 100 parts by weight of a thermoplastic resin, (b) 5 to 60 parts by weight of a halogen-containing flame retardant, (c) 3 to 20 parts by weight of a flame-retardant aid, (d) 0.5 to 10 parts by weight of silicone and (e) 5 to 30 parts by weight of magnesium hydroxide particles, and which undergoes extinction without dripping so that highly reliable flame retardancy can be obtained, shows excellent mold releasability, and gives a molded article which hardly suffers deterioration in physical properties; and a molded article molded from the composition.Type: GrantFiled: May 26, 1998Date of Patent: March 28, 2000Assignee: Kyowa Chemical Industry Co. Ltd.Inventor: Takeshi Imahashi
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Patent number: 5925700Abstract: A halogen-free flame-retardant polyolefin resin composition which can give a molded article improved in low-temperature resistance and surface whitening resistance and improved in flame retardancy and melt index, and an expansion-molded article having uniform and fine gas bubbles without large-sized gas bubbles, the halogen-free flame-retardant polyolefin-based resin composition containing a polyolefin resin, a dihydric or trihydric metal hydroxide surface-treated with a saturated fatty acid, or, when the metal hydroxide is aluminum hydroxide, aluminum hydroxide surface-treated with a saturated or specific unsaturated fatty acid or an alkali metal salt thereof, and an aluminum salt of an unsaturated fatty acid having 10 to 30 carbon atoms.Type: GrantFiled: December 16, 1997Date of Patent: July 20, 1999Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Takeshi Imahashi
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Patent number: 5777018Abstract: A halogen-free flame-retardant polyolefin resin composition which can give a molded article improved in low-temperature resistance and surface whitening resistance and improved in flame retardancy and melt index, and an expansion-molded article having uniform and fine gas bubbles without large-sized gas bubbles, the halogen-free flame-retardant polyolefin-based resin composition containing a polyolefin resin, a dihydric or trihydric metal hydroxide surface-treated with a saturated fatty acid, or, when the metal hydroxide is aluminum hydroxide, aluminum hydroxide surface-treated with a saturated or specific unsaturated fatty acid or an alkali metal salt thereof, and an aluminum salt of an unsaturated fatty acid having 10 to 30 carbon atoms.Type: GrantFiled: February 23, 1996Date of Patent: July 7, 1998Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Takeshi Imahashi
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Patent number: 5583172Abstract: A flame retardant aid which serves to provide synthetic resins with sufficient flame retardancy when used together with a decreased amount of aluminum or magnesium hydroxide, and serves to give resin compositions which have color stability against heat and can be almost freely colored. The flame retardant aid is at least one compound selected from the group consisting of:a composite metal compound of the formula (A),Mg.sub.1-(x+y) Ni.sub.x Co.sub.y (OH).sub.2 (A)ora composite metal compound of the formula (B),Mg.sub.1-(x+y) Ni.sub.x Co.sub.y O (B)wherein x and y are defined in the specification,nickel halides,ammonium-containing salts of nickel,inorganic acid salts of nickel, andfatty acid salts of nickel.Type: GrantFiled: October 4, 1994Date of Patent: December 10, 1996Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Takeshi Imahashi, Akira Okada, Tomoko Abe
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Patent number: 5438084Abstract: A flame retardant capable of imparting a polyamide-containing resin with excellent flame retardancy without deteriorating the impact strength of the polyamide-containing resin even when it is incorporated in a small amount, and a flame-retardant polyamide-containing resin composition containing the above flame retardant and having practically sufficient impact strength. The flame retardant comprises 100 parts by weight of magnesium hydroxide, 2 to 750 parts by weight of red phosphorus and 0.2 to 250 parts by weight of an epoxy resin, and the flame-retardant polyamide-containing resin composition comprises 100 parts by weight of a polyamide-containing resin, 2 to 50 parts by weight of magnesium hydroxide, 1 to 15 parts by weight of red phosphorus and 0.1 to 5 parts by weight of an epoxy resin.Type: GrantFiled: January 12, 1995Date of Patent: August 1, 1995Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Takeshi Imahashi
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Patent number: 5094781Abstract: A fire retardant comprising 100 parts by weight of a metal hydroxide and 0.1 to 50 parts by weight of an acrylic fiber, and a fire-retardant resin composition comprising 20 to 80% by weight of a synthetic resin or rubber, 80 to 20% by weight of a metal hydroxide and 0.1 to 10 parts by weight, based on 100 parts by weight of the synthetic resin or rubber and the metal hydroxide in total, or an acrylic fiber. The present composition has improved fire retardancy free from degradation in mechanical strength and deterioration of water resistance, and the present fire retardant permits free coloring and releases no toxic smoke.Type: GrantFiled: March 30, 1990Date of Patent: March 10, 1992Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Shigeo Miyata, Takeshi Imahashi
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Patent number: 4729854Abstract: A fire-retardant resin composition comprising(A) 100 parts by weight of a member selected from the group consisting of the thermoplastic resins and the thermosetting resins,(B) about 1 to about 50 parts by weight of a halogen-containing organic fire retardant,(C) about 0.05 to about 10 parts by weight of a hydrotalcite having a BET specific surface area not exceeding about 30 square meters per gram, as a stabilizer, and(D) 0 to about 20 parts by weight of a fire-retarding assistant other than the fire retardant of (B), above.Type: GrantFiled: July 7, 1986Date of Patent: March 8, 1988Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Shigeo Miyata, Takeshi Imahashi
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Patent number: 4396730Abstract: A fire-retarding resin composition composed of(a) a thermoplastic resin,(b) about 20 to about 60% by weight, based on the total weight of (a), (b) and (c), of a magnesium hydroxide powder whose surface is treated with an alkali metal oleate, and(c) about 0.1 to about 10% by weight, based on the total weight of (a), (b) and (c), of at least one fatty acid metal salt selected from the group consisting of magnesium oleate and aluminum oleate; and a fire retardant composition for thermoplastic resins, said composition comprising(b) a magnesium hydroxide powder whose surface is treated with an alkali metal oleate, and(c) at least one fatty acid metal salt selected from the group consisting of magnesium oleate and aluminum oleate, the weight ratio of (b) to (c) being from 2 to 600:1.Type: GrantFiled: November 19, 1981Date of Patent: August 2, 1983Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Takeshi Imahashi