Patents by Inventor Shigeo Miyata
Shigeo Miyata 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: 5151455Abstract: A flame retardant having excellent resistance to water and acid for a long period of time and comprising 100 parts by weight of magnesium hydroxide of which the surface is treated with a phosphoric ester of formula (I) ##STR1## wherein R represents an alkyl or alkenyl group having 10 to 30 carbon atoms, M represents an atom belonging to group IA of the periodic table or NH.sup.4+, and n represents 1 or 2, and 0.1 to 10 parts by weight of a salt of a metal other than alkali metals with a higher fatty acid, and a resin composition containing the flame retardant.Type: GrantFiled: July 10, 1990Date of Patent: September 29, 1992Assignee: Kyowa Chemical IndustryInventors: Shigeo Miyata, Makoto Yoshii
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Patent number: 5120783Abstract: A stabilized halogen-containing resin composition wherein(a) 0.01 to 10 weight parts of da hydrotalcite,(b) 0.01 to 5 weight parts of a zinc compound,(c) 0.01 to 5 weight parts of magnesium hydroxide, and(d) 0.01 to 5 weight parts of a .beta.-diketone compound and/or a phosphite compoundare compound into a halogen-containing resin per 100 weight parts thereof and a molding article therefrom.Type: GrantFiled: November 15, 1990Date of Patent: June 9, 1992Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Tsutomu Nosu, Shigeo Miyata
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Patent number: 5106898Abstract: A stabilizer composition for use in halogen-containing resins, comprising as an active ingredient a melt mixture containing a product of a hydrotalcite obtained by removing water of crystallization and a lubricant.Type: GrantFiled: July 3, 1990Date of Patent: April 21, 1992Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Tsutomu Nosu, Shigeo Miyata
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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: 5047203Abstract: A purifier for nuclear reactor cooling water, which contains, as an active ingredient,a titanium oxide-based solid solution of the formula (1)(Ti.sub.1-x Al.sub.x)O.sub.2 (1)wherein x is defined by 0<x<0.5, and/oran aluminum oxide-based solid solution of the formula (2)(Al.sub.1-y Ti.sub.y).sub.2 O.sub.3 (2)wherein y is defined by 0<y<0.5, and a method of purification of nuclear reactor cooling water, which comprises bringing nuclear reactor cooling water having a temperature of 100.degree. to 300.degree. C. into contact with the above purifier.Type: GrantFiled: September 19, 1990Date of Patent: September 10, 1991Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Shigeo Miyata, Akira Okada
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Patent number: 5039509Abstract: A process for the production of a magnesium oxide having high hydrolysis resistance and high fluidity, which comprises:(A) a step of reacting a water-soluble magnesium salt with an alkaline substance in such an amount that is not more than 0.95 equivalent weight based on 1 equivalent weight of the water-soluble magnesium salt, at a temperature of not more than 40.degree. C.,(B) a step of heating the resultant reaction product and its reaction mother liquor at about 50.degree. to 120.degree. C. to form a magnesium hydroxide,(C) a step of forming particles having an average secondary particle diameter of about 5 to 500 .mu.m by using a spray drier,(D) a step of firing the particles at about 1,100.degree. to 1,600.degree. C., and(E) a step of pulverizing the resultant fired product under conditions which do not substantially destroy the average secondary particle diameter obtained in the above step (C).Type: GrantFiled: January 31, 1990Date of Patent: August 13, 1991Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Shigeo Miyata, Hitoshi Anabuki, Hitoshi Manabe
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Patent number: 5034442Abstract: A flame retardant produced by surface-treating magnesium hydroxide with a dialcohol amine salt of an alcohol phosphate ester represented by formula (1) ##STR1## wherein R represents an alkyl, alkenyl group or aralkyl having 10 to 30 carbon atoms, R' represents an alkylene group having 1 to 6 carbon atoms and n represents 1 or 2,and/or an alcohol phosphate ester or an alkali metal salt thereof represented by formula (2) ##STR2## wherein R and n represent the same meanings as in formula (1) and M represents an alkali metal and/or hydrogen, provided that when n=1, each of two M's may independently represent an alkali metal or hydrogen.and a resin composition containing the above flame retardant.Type: GrantFiled: August 16, 1989Date of Patent: July 23, 1991Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Toru Hirose, Shigeo Miyata
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Patent number: 4954557Abstract: In a process for preparing a molded article by melt-molding a mixture of (A) a hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 80% by mole and a degree of hydrolysis in the vinyl acetate units of at least 90% by mole and (B) an olefin resin, the improvement which comprises melt-molding said mixture in the presence of a hydrotalcite solid solution (C) having the formula (I):{(M.sub.1.sup.2+).sub.yl (M.sub.2.sup.2+).sub.y2 }.sub.1-x (M.sup.3+).sub.x (OH).sub.2 (A.sup.n-).sub.x/n.mH.sub.2 O (I)According to the process of the present invention, long run processability during melt-molding can be remarkably improved, and the obtained molded article has excellent qualities, e.g., the film has few fish eyes.Type: GrantFiled: January 25, 1989Date of Patent: September 4, 1990Assignees: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha, Kyowa Kogyo Kabushiki KaishaInventors: Teruo Iwanami, Shigeo Miyata, Takamasa Moriyama
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Patent number: 4842645Abstract: A rust-proofing agent containing as an active ingredient an oxide solid solution represented by formula (1)[(Zn).sub.1-y (Mg).sub.y ].sub.1-x Al.sub.x O.sub.1+x/2 (1)wherein x denotes a positive number satisfying 0.1<x<0.6 and y denotes a positive number satisying 0<y<1, a rust-proofing coating composition containing said rust-proofing agent and a coating method for preventing or inhibiting corrosion of a metallic surface.Type: GrantFiled: May 2, 1988Date of Patent: June 27, 1989Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Shigeo Miyata, Hideo Takahashi
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Filiform corrosion-resistant primer coating composition and method for preventing filiform corrosion
Patent number: 4761188Abstract: A filiform corrosion-resistant primer coating composition for use in application to a metallic substrate, comprising a film forming component containing a film-forming resinous material and a hydrotalcite component, characterized in that the hydrotalcite component is a hydrotalcite solid solution represented by the following formula (1)[(Mg.sup.2+).sub.y1 (M.sup.2+) y2].sub.1-x M.sub.x.sup.3+ (OH).sub.2 A.sub.x/n.sup.n-.mH.sub.2 Owherein M.sup.2+ represents at least one divalent metal cation selected from the group consisting of Zn, Cd, Pb, Ca and Sr, M.sup.3+ represents a trivalent metal cation, A.sup.n- represents an anion having a valence of n, and x, y1, y2 and m represent positive numbers which satisfy the following conditions:0<x.ltoreq.0.5,0<y1,0<y2,0.5.ltoreq.y1+y2<1, and0.ltoreq.m<2,the amount of the hydrotalcite solid solution being 0.1 to 20 parts by weight per 100 parts by weight of the film-forming component.Type: GrantFiled: March 23, 1987Date of Patent: August 2, 1988Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Shigeo Miyata -
Patent number: 4751261Abstract: Magnesium oxide is incorporated into a polyvinyl chloride resin composition comprising a polyvinyl chloride, a hydrotalcite, a .beta.-diketone compound and an organic acid salt of zinc or a polyvinyl chloride resin composition comprising a polyvinyl chloride, a hydrotalcite and an organic tin compound. Bubbling as well as discoloration can be prevented in a molded article prepared from the polyvinyl chloride resin composition. Magnesium oxide having a specific surface area of at least 50 m.sup.2 /g and an average secondary particle size smaller than 5 .mu.m is preferably used.Type: GrantFiled: August 13, 1987Date of Patent: June 14, 1988Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Shigeo Miyata, Tsutomu Nosu
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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: 4710551Abstract: In a process for producing a polymer or copolymer of a vinyl chloride monomer with or without a comonomer by aqueous suspension polymerization or copolymerization in the presence of a suspension stabilizer and a polymerization initiator which is insoluble or sparingly soluble in water and soluble in the monomer; the improvement wherein the polymerization or copolymerization is carried out in the presence of, as said suspension stabilizer, a hydrotalcite compound of the following formulaM.sub.1-x.sup.2+ M.sub.x.sup.3+ (OH).sub.2 A.sub.x/n.sup.n-.mH.sub.2 O (1)wherein M.sup.2+ is at least one divalent metal cation, M.sup.3+ is at least one trivalent metal cation, A.sup.n- is an anion having a valence of 1 to 4, and x and m represent numbers satisfying the following expressions0<x<0.5 and 0.ltoreq.m<2.Type: GrantFiled: December 10, 1985Date of Patent: December 1, 1987Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Shigeo Miyata
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Patent number: 4686791Abstract: An agricultural film structure composed of a mixture of a thermoplastic resin and an infrared radiation-absorbing powdery inorganic compound, said mixture comprising(a) 100 parts by weight of a thermoplastic resin and(b) about 1 to about 20 parts by weight of a hydrotalcite powder, as the infrared radiation absorbing powdery inorganic compound, having an average secondary particle diameter of not more than about 5 microns and a BET specific surface area of not more than about 30 m.sup.2 /g and being represented by the following formula (1)M.sub.1-x.sup.2+ Al.sub.x (OH).sub.2 (A.sup.n-).sub.x/n mH.sub.2 O (1)wherein M.sup.2+ represents a divalent metal ion selected from the group consisting of Mg, Ca and Zn ions, A.sup.n- represents an anion having a valence of n, and x and m satisfy the following conditions0<x<0.50.ltoreq.m.ltoreq.2.Type: GrantFiled: November 24, 1986Date of Patent: August 18, 1987Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Shigeo Miyata
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Patent number: 4675356Abstract: A synthetic resin composition having reduced corrosion-causing tendency and coloration, said composition comprising (A) 100 parts by weight of a synthetic resin containing halogen and/or an acidic substance, and (B) 0.001 to 50 parts by weight of a hydrotalcite solid solution represented by the following formula (1)[(M.sub.1.sup.2+).sub.y1 (M.sub.2.sup.2+).sub.y2 ].sub.1-x M.sub.x.sup.3+ (OH).sub.2 A.sub.x/n.sup.n-.mH.sub.2 O . . . (1)wherein M.sub.1.sup.2+ represents at least one divalent metal cation, M.sub.2.sup.2+ represents at least one divalent metal cation, M.sup.3+ represents a trivalent metal cation, A.sup.n- represents an anion having a valency of n, and x, y1, Y2 and m are positive numbers represented by the following expressions0<x.ltoreq.0.5,0<y1,0<y2,0.5.ltoreq.y1+y2<1, and0.ltoreq.m<2; anda method for preventing the corrosion-causing tendency or coloration of a synthetic resin containing halogen and/or an acidic substance by using the above formula (1) compound.Type: GrantFiled: January 29, 1986Date of Patent: June 23, 1987Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Shigeo Miyata
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Patent number: 4642193Abstract: A method of purifying cooling water used in nuclear reactors, which comprises contacting said cooling water with a hydrotalcite compound of the following formulaM.sub.1-x.sup.2+ M.sub.x.sup.3+ (OH).sub.2 A.sub.x/n.sup.n-. mH.sub.2 O (1)wherein M.sup.2+ represents a divalent metal cation, M.sup.3+ represents a trivalent metal cation, A.sup.n- represents an anion having a valence of n, and x and m satisfy the following expressions0<x<0.50.ltoreq.m<1or a calcined product thereof obtained by calcination at a temperature of up to about 900.degree. C.; and a purifying agent used therefor.Type: GrantFiled: January 25, 1985Date of Patent: February 10, 1987Assignee: Kyowa Chemical Industry Co. Ltd.Inventors: Shigeo Miyata, Noriko Iizima, Tadashi Manabe
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Patent number: 4629626Abstract: A hydrothermally treated product useful for treating an iron deficiency of a compound having a hydrotalcite-like crystal structure and represented by the following formula (I)(Fe.sup.2+,Mg.sup.2+).sub.x (Al.sup.3+,Fe.sup.3+).sub.2 (OH).sub.2x+6-nz (A.sup.n-).sub.z.mH.sub.2 O (I)wherein A.sup.n- represents an anion having a valence of n, Mg.sup.2+ is within the range of O.ltoreq.Mg.sup.2+ <x, Fe.sup.3+ is within the range of O.ltoreq.Fe.sup.3+ <2, x is a number represented by 1.ltoreq.x<20, z is a number represented by 0<z<3, and m is a number represented by 0.ltoreq.m<20, the product being formed by the thermal treatment of the compound of formula (I) at a temperature of about 100.degree. C. to about 200.degree. C. in an aqueous medium.Type: GrantFiled: June 27, 1984Date of Patent: December 16, 1986Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Shigeo Miyata, Hitoshi Anabuki
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Patent number: 4576819Abstract: An aluminum hydroxide gel of the following formula[CaO, MgO, M.sub.2 O].sub.x.Al.sub.2 O.sub.3.(CO.sub.2).sub.y.mH.sub.2 Owherein M represents an alkali metal, M.sub.2 O may be zero, CaO and MgO are not zero at the same time, and x, y and m are positive numbers represented by the following expressions0<x<1,0.2<y.gtoreq.1,2.gtoreq.m<10.Said aluminum hydroxide gel can be produced by reacting an aluminum compound soluble in water and/or lower alcohols with a carbonate ion yielding compound soluble in water and/or lower alcohols at a pH of about 6 to about 9.5 under such conditions that the CO.sub.2 /Al mole ratio of the resulting aluminum hydroxide gel is at least about 0.1, and ion exchanging the alkali metals of the resulting compound with magnesium and/or calcium. This invention also provides an antacid composition comprising said aluminum hydroxide gel as an active ingredient.Type: GrantFiled: November 22, 1983Date of Patent: March 18, 1986Assignee: Kyowa Chemical Industry Co., Ltd.Inventors: Shigeo Miyata, Tsutomu Nosu
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Patent number: 4562295Abstract: A method for purifying cyclohexanone containing by-product organic acids and obtained by oxidation of cyclohexane, which comprises contacting said cyclohexanone with at least one treating agent selected from the group consisting of hydrotalcite compounds of the following formula (1)M.sub.x.sup.2+ M.sub.2.sup.3+ (OH).sub.2x+6-nz (A.sup.n-).sub.z.mH.sub.2 O (1)wherein M.sup.2+ represents a divalent metal ion, M.sup.3+ represents a trivalent metal ion, A.sup.n- represents an anion having a valence of n, and x, z and m represent numbers satisfying the following expressions1<x<20,0<z.ltoreq.2,0.ltoreq.m<20'and metal oxide-type solid solutions of the following formula (2)M.sub.1-x'.sup.2+ M.sub.x'.sup.3+ O.sub.1+1/2x' (2)wherein M.sup.2+ and M.sup.3+ are as defined with respect to formula (1), and x' is a number represented by 0<x'<0.5, and showing a powder X-ray diffraction pattern corresponding to M.sup.2+ O.Type: GrantFiled: August 3, 1984Date of Patent: December 31, 1985Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Shigeo Miyata
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Patent number: 4558102Abstract: A curable rubber composition composed of a halogen-containing rubber and at least one member selected from the group consisting of a vulcanizing agent and a vulcanization accelerator other than thiazole-type vulcanization accelerators is cured under heat in the presence of, as an acid acceptor, a calcinated product of a hydrotalcite compound of the following formulaM.sub.x.sup.2+ Al.sub.2 (OH).sub.2x+6-nz (A.sup.n-).sub.z.mH.sub.2 O (1)wherein M.sup.2+ represents at least one metal element selected from the group consisting of Mg and Zn, A.sup.n- represents an anion having a valence of n, m represents a positive number, and x and z represent positive numbers satisfying the following expressions12>x.gtoreq.2,z.ltoreq.2.The cured product has improved water resistance.Type: GrantFiled: August 1, 1984Date of Patent: December 10, 1985Assignee: Kyowa Chemical Industry Co., Ltd.Inventor: Shigeo Miyata