Patents by Inventor Takaharu Itagaki
Takaharu Itagaki 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).
-
Patent number: 5064909Abstract: Disclosed herein is a vinylamine copolymer having the structural units represented by the following formulas (I), (II), (III), (IV) and (V): ##STR1## wherein x.sup..crclbar. represents an anion or hydroxyl ion, R represents a hydrogen atom or a methyl group, M.sup..sym. represents a hydrogen ion or a monovalent cation, in which the molar fraction of the structural unit (I) is 5 to 85% by mole, the molar fraction of the structural unit (II) is 2 to 85% by mole, the molar fraction of the structural unit (III) is 5 to 80% by mole, the molar fraction of the structural unit (IV) is 0 to 40% by mole, all of said molar fractions being based on the vinylamine copolymer, and the molar fraction of the structural unit (V) is 0 to 8% by mole which is based on the total content of the structural units (III), (IV), and (V), a flocculating agent and a paper strength increasing agent using the vinylamine copolymer, and a process for producing the vinylamine copolymer.Type: GrantFiled: August 7, 1990Date of Patent: November 12, 1991Assignee: Mitsubishi Kasei CorporationInventors: Takaharu Itagaki, Mitsuaki Shiraga, Shigeru Sawayama, Kohichi Satoh
-
Patent number: 5037927Abstract: Disclosed herein are an N-vinylformamide copolymer having the structural units represented by the following formulas (I) and (II): ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group and R.sub.2 represents an alkyl group of 1 to 4 carbon atoms, in which the molar ratio between the structural units (I) and (II) is from 20:80 to 95:5, and a process for producing the N-vinylformamide copolymer.Type: GrantFiled: August 10, 1988Date of Patent: August 6, 1991Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Takaharu Itagaki, Mitsuaki Shiraga, Shigeru Sawayama, Kohichi Satoh
-
Patent number: 4976976Abstract: A feed additive for ruminants, which comprises core containing a carbamate of a basic amino acid and coated with a polymer coating agent soluble or swellable in water in an acidic region of a pH of at most 5.Type: GrantFiled: June 21, 1989Date of Patent: December 11, 1990Assignees: Mitsubishi Kasei Corporation, Ajinomoto Company, IncorporatedInventors: Takaharu Itagaki, Hiroyoshi Okada, Masao Miyake, Takaaki Kobayashi, Takahumi Tosa, Hiroyuki Satou
-
Patent number: 4957977Abstract: Disclosed herein is a vinylamine copolymer having the structural units represented by the following formulas (I), (II), (III), (IV) and (V): ##STR1## wherein X.sup..crclbar. represents an anion or hydroxyl ion, R represents a hydrogen atom or a methyl group, M.sup..sym. represents a hydrogen ion or a monovalent cation, in which the molar fraction of the structural unit (I) is 5 to 85% by mole, the molar fraction of the structural unit (II) is 2 to 85% by mole, the molar fraction of the structural unit (III) is 5 to 80% by mole, the molar fraction of the structural unit (IV) is 0 to 40% by mole, all of said molar fractions being based on the vinylamine copolymer and the molar fraction of the structural unit (V) is 0 to 8% by mole which is based on the total content of the structural units (III), (IV) and (V), a flocculating agent and a paper strength increasing agent using the vinylamine copolymer, and a process for producing the vinylamine copolymer.Type: GrantFiled: January 25, 1990Date of Patent: September 18, 1990Assignee: Mitsubishi Kasei CorporationInventors: Takaharu Itagaki, Mitsuaki Shiraga, Shigeru Sawayama, Kohichi Satoh
-
Patent number: 4937083Abstract: A feed additive for ruminants, which comprises core containing a carbamate of a basic amino acid and coated with a polymer coating agent soluble or swellable in water in an acidic region of a pH of at most 5.Type: GrantFiled: April 7, 1988Date of Patent: June 26, 1990Assignees: Mitsubishi Chemical Industries Limited, Ajinomoto Company, IncorporatedInventors: Takaharu Itagaki, Hiroyoshi Okada, Masao Miyake, Takaaki Kobayashi, Takahumi Tosa, Hiroyuki Satou
-
Patent number: 4863972Abstract: Porous cross-linked polyvinyl alcohol particles which is used for a chromatographic medium is prepared by:dispersing an aqueous solution of a mixture of polyvinyl alcohol and a salt in an organic solvent;allowing a gel to form spontaneously from the dispersion; andreacting the gel with a cross-linking agent.Type: GrantFiled: July 7, 1987Date of Patent: September 5, 1989Assignee: Mitsubishi Chemical Industries LimitedInventors: Takaharu Itagaki, Hiroshi Kusano, Eiji Miyata, Takayuki Tashiro
-
Patent number: 4857576Abstract: A method for rendering a flammable polymer material flame-resistant, which comprises incorporating to the flammable polymer material a powder of a cross-linked aromatic polymer brominated to contain from 30 to 70% by weight of bromine.Type: GrantFiled: March 21, 1986Date of Patent: August 15, 1989Assignees: Mitsubishi Kasei Corporation, MANAC IncorporatedInventors: Hiromi Kochi, Kenji Fukunaga, Takaharu Itagaki, Tsuyoshi Ito
-
Patent number: 4808683Abstract: Disclosed herein is a vinylamine copolymer having the structural units represented by the general formulae (I), (II) and (III): ##STR1## (wherein X represents an anion or hydroxyl ion) ##STR2## (wherein R.sup.1 represents hydrogen atom or a methyl group, R.sup.2 represents hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and R.sup.3 represents an alkyl group having 1 to 4 carbon atoms or an oxoalkyl group having 4 to 8 carbon atoms) in which the molar fraction of the structural unit (I) is 5 to 85% by mole, the molar fraction of the structural unit (II) is 5 to 85% by mole, and the molar fraction of the structural unit (III) is 90 to 5% by mole, a flocculating agent, a drainage aid and a paper strength increasing agent using such vinylamine copolymer, and a process for producing such vinylamine copolymer.Type: GrantFiled: June 16, 1987Date of Patent: February 28, 1989Assignee: Mitsubishi Chemical Industries LimitedInventors: Takaharu Itagaki, Mitsuaki Shiraga, Shigeru Sawayama, Kohichi Satoh
-
Patent number: 4696745Abstract: A method for producing a separating agent having a fluorine-containing group and a hydrophilic group, wherein a cross-linking component consisting of alkylene di(meth)acrylate and/or glycerine poly(meth)acrylate, and a principal chain component consisting of ester and/or ether having therein a polymerizable vinyl group or isopropenyl group and a functional group are subjected to suspension-polymerization to obtain a cross-linked copolymer, and then the functional group in the copolymer is subjected to chemical modification with a fluorine-containing compound or with both fluorine-containing compound and hydrophilic-group-containing compound. The separating agent of the present invention consists essentially of porous cross-linked copolymer particles having porosity in a range of from 0.5 to 3 ml/g and an average particle size in a range of from 1 to 2,000 .mu.m.Type: GrantFiled: April 9, 1986Date of Patent: September 29, 1987Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Takaharu Itagaki, Hiroshi Kusano, Eiji Miyata, Hirohisa Kubota
-
Patent number: 4543365Abstract: A method for increasing the porosity of a cross-linked copolymer composed essentially of at least one monovinyl aromatic compound selected from the group consisting of styrene, vinyl toluene and ethyl vinyl benzene, at least one polyvinyl aromatic compound selected from the group consisting of divinyl benzene, trivinyl benzene, divinyl toluene and divinyl xylene, and an aliphatic vinyl compound, wherein the proportion of the polyvinyl aromatic compound relative to the total vinyl compounds is from 8 to 80% by weight, and the proportion of the aliphatic vinyl compound relative to the total vinyl compounds is from 0 to 20% by weight, which method comprises treating particles of said copolymer with a Lewis acid catalyst in an amount of from 0.05 to 1 part by weight relative to 1 part by weight of the copolymer particles, in the presence of an organic solvent.Type: GrantFiled: January 24, 1985Date of Patent: September 24, 1985Assignee: Mitsubishi Chemical Industries Ltd.Inventors: Takaharu Itagaki, Tsuyoshi Ito, Kiyoto Ando, Hiromi Teshima
-
Patent number: 4495250Abstract: A present invention relates to an anion exchange resin of surface functional type and the process for producing the same. The anion exchange resin of the present invention has anion exchange groups only in a linear polymer layer coated on the surface of a lipophilic crosslinked polymer matrix, and ion exchange reaction of the present anion exchange resin proceeds rapidly. Accordingly, the anion exchange resin of the present invention is useful for a packing for ion exchange chromatography.Type: GrantFiled: August 16, 1983Date of Patent: January 22, 1985Assignee: Mitsubishi Chemical Industries, LimitedInventors: Takaharu Itagaki, Hidenaga Ouchi, Akihiro Shimura
-
Patent number: 4350773Abstract: A weakly acidic cation exchange resin which is obtainable by a reaction of glyoxylic acid and a polyvinyl alcohol cross-linked by cross-linking groups each containing two or more carbon atoms, and has an exchange capacity of 3 meq/g or greater and a swelling volume of 10 ml/g or smaller, as well as a process for producing such cation exchange resin.Type: GrantFiled: July 6, 1981Date of Patent: September 21, 1982Assignee: Mitsubishi Chemical Industries, LimitedInventors: Takaharu Itagaki, Hidenaga Ouchi
-
Patent number: 4306031Abstract: A weakly acidic cation exchange resin which is obtainable by a reaction of glyoxylic acid and a polyvinyl alcohol cross-linked by cross-linking groups each containing two or more carbon atoms, and has an exchange capacity of 3 meq/g or greater and a swelling volume of 10 ml/g or smaller, as well as a process for producing such cation exchange resin.Type: GrantFiled: August 4, 1980Date of Patent: December 15, 1981Assignee: Mitsubishi Chemical Industries LimitedInventors: Takaharu Itagaki, Hidenaga Ouchi
-
Patent number: 4251442Abstract: This invention relates to a method for synthesizing a penicillin by reacting a silylate of 6-aminopenicillanic acid and a carboxylic acid halide in the presence of an insoluble weakly basic resin having a three-dimensional structure.Type: GrantFiled: November 21, 1979Date of Patent: February 17, 1981Assignee: Mitsubishi Chemical Industries LimitedInventors: Yoshiharu Morita, Takaharu Itagaki, Tsuyoshi Ito, Shigenori Wada
-
Patent number: RE34713Abstract: .[.Disclosed herein is a vinylamine copolymer having the structural units represented by the following formulas (I), (II), (III), (IV) and (V): ##STR1## wherein X.sup..crclbar. represents an anion or hydroxyl ion, R represents a hydrogen atom or a methyl group, M.sup..sym. represents a hydrogen ion or a monovalent cation, in which the molar fraction of the structural unit (I) is 5 to 85% by mole, the molar fraction of the structural unit (II) is 2 to 85% by mole, the molar fraction of the structural unit (III) is 5 to 80% by mole, the molar fraction of the structural unit (IV) is 0 to 40% by mole, all of said molar fractions being based on the vinylamine copolymer and the molar fraction of the structural unit (V) is 0 to 8% by mole which is based on the total content of the structural units (III), (IV) and (V), a flocculating agent and a paper strength increasing agent using the vinylamine copolymer, and a process for producing the vinylamine copolymer..]..Iadd.Type: GrantFiled: September 16, 1992Date of Patent: August 30, 1994Assignee: Mitsubishi Kasei CorporationInventors: Takaharu Itagaki, Mitsuaki Shiraga, Shigeru Sawayama, Kohichi Satoh
-
Patent number: RE34903Abstract: Disclosed herein is a vinylamine copolymer having the structural units represented by the following formulas (I), (II), (III).[.,.]. .Iadd.and .Iaddend.(IV) .[.and (VI).].: ##STR1## wherein x.crclbar. represents an anion or hydroxyl ion R represents a hydrogen atom or a methyl group, M.sym. represents a hydrogen ion or a monovalent cation, in which the molar fraction of the structural unit (I) is 5 to 85% by mole, the molar fraction of the structural unit (II) is 2 to 85% by mole, the molar fraction of the structural unit (III) is 5 to 80% by mole,.[.the molar fraction of the structural unit (IV) is 0 to 40% by mole,.]. all of said molar fractions being based on the vinylamine copolymer, and the molar fraction of the structural unit .[.(V).]. (.Iadd.IV) is 0 to 8% by mole which is based on the total content of the structural units (III).[.,.]. .Iadd.and .Iaddend.(IV), .[.and (V),.].Type: GrantFiled: November 8, 1993Date of Patent: April 11, 1995Assignee: Mitsubishi Kasei CorporationInventors: Takaharu Itagaki, Mitsuaki Shiraga, Shigeru Sawayama, Kohichi Satoh