Patents by Inventor Tomohisa Isobe
Tomohisa Isobe 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: 6245695Abstract: A polyurethane resin obtained from a diisocyanate compound and a polyester polyol. The polyester polyol may (1) comprise not less than 50% by weight of a polyester glycol having a molecular weight of 500-5,000, the polyester glycol being obtained by reacting an acid and 3,3,5-trimethyl-1,6-hexanediol or 2,2,4-trimethyl-1,6-hexanediol and have a molecular weight of 500-5,000, (2) have a number average molecular weight of 500-5,000 and an alcohol hydroxyl group at terminals thereof and comprise not less than 50% by weight of ester units, the ester units being derived from a dicarboxylic acid and 3,3,5-trimethyl-1,6-hexanediol and/or 2,2,4-trimethyl-1,6-hexanediol, or (3) have a number-average molecular weight of 500-5,000 and comprise not less than 50% by weight of ester units of an aliphatic dicarboxylic acid and trimethyl-1,6-hexanediols.Type: GrantFiled: February 8, 1999Date of Patent: June 12, 2001Assignee: Daicel Chemical Industries, Ltd.Inventors: Katsuya Maruo, Toshio Endo, Tomohisa Isobe, Kiyoshi Okitsu
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Patent number: 6037393Abstract: Novel polyester compounds having a benzotriazole group of the invention are obtained by a ring-opening addition-polymerisation of lactones with the alcoholic hydroxyl group of 3-(5-chloro-2H-benzotriazol-2-yl)-5-(1,1-dimethyl-ethyl)-4-hydroxy-benzene -propanol, 3-(2H-benzotriazol-2-yl)-4-hydroxy-benzene-ethanol, 3-(5-methyl-2H-benzotriazol-2-yl)-5-(1-methyl-ethyl)-4-hydroxy-benzene-pro panolbis[3-(2H-benzotriazol-2-yl)-4-hydroxy-benzene-ethanol]methane or the like. These compounds are used as ultraviolet-rays absorbents for thermoplastic resins. The resulting resin composition has an excellent light resistance and chemical resistance.Type: GrantFiled: October 1, 1998Date of Patent: March 14, 2000Assignee: Daicel Chemical Industries, Ltd.Inventors: Koichi Okumura, Toshio Endo, Tomohisa Isobe
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Patent number: 5777027Abstract: A novel lactone-modified polyvinyl acetal resin and a novel carboxyl-modified resin thereof are disclosed. The novel resins of the present invention can be used as a polyol resin for coatings curable at ordinary temperatures or heating, adhesives, binders, a processing agent for fibers, a curable resin composition by mixing with a curing agent which can react to hydroxyl groups, and a composition for a magnetic recording medium, etc. The novel resins of the present invention have graft chains containing primary hydroxyl groups bonded to the ester group derived from a lactone compound, or the primary hydroxyl groups and carboxylic groups.Type: GrantFiled: October 30, 1995Date of Patent: July 7, 1998Assignee: Daicel Chemical Industries, Ltd.Inventors: Toshio Endo, Takaaki Fujiwa, Tomohisa Isobe, Kazushi Watanabe
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Patent number: 5721329Abstract: Disclosed are a novel lactone-modified diketene (meth)acrylate compound having an active methylene group in the molecule and a process for the preparation thereof. The novel lactone-modified diketene (meth)acrylate compound of the present invention can be preferably used as resins for coatings, adhesives, inks, photosensitive materials for photographs, dispersants for pigments, agents for processing fibers, and modifiers for rubbers. Furthermore, disclosed is a novel (co)polymer which comprises the novel lactone-modified diketene (meth)acrylate compound and, optionally, a polymerizable monomer having an ethylenically unsaturated double bond. Still further, disclosed is a curable composition which comprises a lactone-modified diketene (meth)acrylate compound and at least one selected from the group consisting of a melamine, an isocyanate, and aldehyde, and an amine.Type: GrantFiled: November 20, 1996Date of Patent: February 24, 1998Assignee: Daicel Chemical Industries, Ltd.Inventors: Takaaki Fujiwa, Tomohisa Isobe
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Patent number: 5712334Abstract: Disclosed are a lactone-modified polyvinyl alcohol and a process for the preparation thereof, a polymer composition, a permanently anti-electrostatic resin composition, a lactone-modified resin having hydroxyl groups, and a process for the preparation thereof. The lactone-modified polyvinyl alcohol can be used in wide fields owing to the capability of freely adjusting the water solubility, such as water-soluble, gradually water-soluble, low water-soluble, and water-insoluble by a degree modified by lactone compounds, and owing to possessing properties both of PVA and lactones. Furthermore, the lactone-modified polyvinyl alcohol has properties such as being plasticizers or softening agents, and as a result, there can be provided a polymer composition having excellent properties by mixing with a hydrophilic polymer or polar polymer.Type: GrantFiled: December 26, 1996Date of Patent: January 27, 1998Assignee: Daicel Chemical Industries, Ltd.Inventors: Kazushi Watanabe, Takaaki Fujiwa, Tomohisa Isobe, Hiroshi Sagane
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Patent number: 5631342Abstract: Disclosed are a novel lactone-modified diketene (meth)acrylate compound having an active methylene group in the molecule and a process for the preparation thereof.The novel lactone-modified diketene(meth)acrylate compound of the present invention can be preferably used as resins for coatings, adhesives, inks, photosensitive materials for photographs, dispersants for pigments, agents for processing fibers, and modifiers for rubbers.Furthermore, disclosed is a novel (co)polymer which comprises the novel lactone-modified diketene(meth)acrylate compound and, optionally, a polymerizable monomer having an ethylenically unsaturated double bond.Still further, disclosed is a curable composition which comprises a lactone-modified diketene(meth)acrylate compound and at least one selected from the group consisting of a melamine, an isocyanate, and aldehyde, and an amine.Type: GrantFiled: November 22, 1995Date of Patent: May 20, 1997Assignee: Daicel Chemical Industries, Ltd.Inventors: Takaaki Fujiwa, Tomohisa Isobe
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Patent number: 5612412Abstract: Disclosed are a lactone-modified polyvinyl alcohol and a process for the preparation thereof, a polymer composition, a permanently anti-electrostatic resin composition, a lactone-modified resin having hydroxyl groups, and a process for the preparation thereof.The lactone-modified polyvinyl alcohol can be used in wide fields owing to capability of freely adjusting a water solubility such as water-soluble, gradually water-soluble, low water-soluble, and water-insoluble by a degree modified by lactone compounds, and owing to possessing both properties in PVA and lactones.Furthermore, the lactone-modified polyvinyl alcohol has a property as plasticizers or softening agents, as a result, there can be provided a polymer composition having an excellent property by mixing with hydrophilic polymer or polar polymer.Type: GrantFiled: June 7, 1995Date of Patent: March 18, 1997Assignee: Daicel Chemical Industries, Ltd.Inventors: Kazushi Watanabe, Takaaki Fujiwa, Tomohisa Isobe, Hiroshi Sagane
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Patent number: 5574098Abstract: A novel lactone-modified polyvinyl acetal resin and a novel carboxyl-modified resin thereof are disclosed.The novel resins of the present invention can be used as a polyol resin for coatings curable at ordinary temperatures or heating, adhesives, binders, a processing agent for fibers, a curable resin composition by mixing with a curing agent which can react to hydroxyl groups, and a composition for a magnetic recording medium, etc.The novel resins of the present invention have graft chains containing primary hydroxyl groups bonded to the ester group derived from a lactone compound, or the primary hydroxyl groups and carboxylic groups.Type: GrantFiled: October 6, 1994Date of Patent: November 12, 1996Assignee: Daicel Chemical Industries, Ltd.Inventors: Toshio Endo, Takaaki Fujiwa, Tomohisa Isobe, Kazushi Watanabe
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Patent number: 5569773Abstract: The present invention provides a composition represented by the formula ##STR1## (wherein x is an integer of 3 to 7, y is an integer of 0 to 50, and R.sub.a and R.sub.b are H, methyl group, or propyl group and each of the R.sub.a and R.sub.b groups may be replaced with any of the other groups simultaneously) and useful as a raw material or modifier for resins for use in coating compositions, adhesives, epoxy resins, and the like, and further provides a process for producing a composition comprising compounds represented by the above formula (I) which process is characterized in that a compound represented by the formula ##STR2## is reacted with a lactone at 30.degree. to 20.degree. C. or compounds represented by the formula ##STR3## (wherein x, y, R.sub.a, and R.sub.b have the meanings as defined above) are epoxidized at 0.degree. to 80.degree. C. using a peroxide.Type: GrantFiled: July 15, 1994Date of Patent: October 29, 1996Assignee: Daicel Chemical Industries, Ltd.Inventors: Takaaki Fujiwa, Tomohisa Isobe
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Patent number: 5367088Abstract: The present invention provides a composition represented by the formula ##STR1## (wherein x is an integer of 3 to 7, y is an integer of 0 to 50, and R.sub.a and R.sub.b are H, methyl group, or propyl group and each of the R.sub.a and R.sub.b groups may be replaced with any of the other groups simultaneously) and useful as a raw material or modifier for resins for use in coating compositions, adhesives, epoxy resins, and the like, and further provides a process for producing a composition comprising compounds represented by the above formula (I) which process is characterized in that a compound represented by the formula ##STR2## is reacted with a lactone at 30 to 20.degree. C. or compounds represented by the formula ##STR3## (wherein x, y, R.sub.a, and R.sub.b have the meanings as defined above) are epoxidized at 0 to 80.degree. C. using a peroxide.Type: GrantFiled: September 21, 1993Date of Patent: November 22, 1994Assignee: Daicel Chemical Industries, Ltd.Inventors: Takaaki Fujiwa, Tomohisa Isobe
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Patent number: 5338879Abstract: A composition comprising a lactone-modified alicyclic compound (I), or an epoxidized lactone-modified alicyclic compound (II) of the following formulae: ##STR1## wherein R is an alkyl group, an aromatic group or an alkenyl group having carbon number of from 1 to 30, Y.sup.1 is at least one of the structural groups; ##STR2## Y.sup.2 is at least one of the structural group; ##STR3## X is the structural group; ##STR4## and R.sup.a and R.sup.b each independently is hydrogen or a methyl group, c and c' represent a number of from 4 to 8, from n1 to nL represents 0 or a number of more than 0, respectively, and n1+n2+n3+ . . . +nL corresponds to the total mole numbers of a lactone introduced into one molecule.These compositions can be made into a heat-curable composition, a photo-curable composition, a polymerizable composition and another photo-curable composition.Type: GrantFiled: August 13, 1992Date of Patent: August 16, 1994Assignee: Daicel Chemical Industries, Ltd.Inventors: Takaaki Fujiwa, Shin Takemoto, Tomohisa Isobe, Yoshiyuki Harano
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Patent number: 5198509Abstract: A composition comprising a lactone-modified alicyclic compound (I), or an epoxidized lactone-modified alicyclic compound (II) of the following formulae: ##STR1## wherein R is an alkyl group, an aromatic group or an alkenyl group having carbon number of from 1 to 30, Y.sup.1 is at least one of the structural groups; ##STR2## Y.sup.2 is at least one of the structural group; ##STR3## X is the structural group; ##STR4## R.sup.a and R.sup.b each independently is hydrogen or a methyl group, c and c' represent a number of from 4 to 8, from n1 to nL represents 0 or a number of more than 0, respectively, and n1+n2+n3+. . . +nL corresponds to the total mole numbers of a lactone introduced into one molecule.These compositions can be made into a heat-curable composition, a photo-curable composition, a polymerizable composition and another photo-curable composition.Type: GrantFiled: June 8, 1992Date of Patent: March 30, 1993Assignee: Daicel Chemical Industries, Ltd.Inventors: Takaaki Fujiwa, Shin Takemoto, Tomohisa Isobe, Yoshiyuki Harano
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Patent number: 5169965Abstract: A composition comprising a lactone-modified alicyclic compound (I), or an epoxidized lactone-modified alicyclic compound (II) of the following formulae: ##STR1## wherein R is an alkyl group, an aromatic group or an alkenyl group having carbon number of from 1 to 30, Y.sup.1 is at least one of the structural groups; ##STR2## Y.sup.2 is at least one of the structural group; ##STR3## X is the structural group; ##STR4## R.sup.4 and R.sup.b each independently is hydrogen or a methyl group, c and c' represent a number of from 4 to 8, from n1 to nL represents 0 or a number of more than 0, respectively, and n1+n2+n3+. . . +nL corresponds to the total mole numbers of a lactone introduced into one molecule.These compositions can be made into a heat-curable composition, a photo-curable composition, a polymerizable composition and another photo-curable composition.Type: GrantFiled: July 10, 1991Date of Patent: December 8, 1992Assignee: Daicel Chemical Industries, Ltd.Inventors: Takaaki Fujiwa, Shin Takemoto, Tomohisa Isobe, Yoshiyuki Harano
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Patent number: 5155243Abstract: The present invention provides a composition represented by the formula ##STR1## (wherein x is an integer of 3 to 7, y is an integer of 0 to 50, and R.sub.a and R.sub.b are H, methyl group, or propyl group and each of the R.sub.a and R.sub.b groups may be replaced with any of the other groups simultaneously)and useful as a raw material or modifier for resins for use in coating compositions, adhesives, epoxy resins, and the like, and further provides a process for producing a composition comprising compounds represented by the above formula (I) which process is characterized in that a compound represented by the formula ##STR2## is reacted with a lactone at 30.degree. to 20.degree. C. or compounds represented by the formula ##STR3## (wherein x, y, R.sub.a, and R.sub.b have the meanings as defined above) are epoxidized at 0.degree. to 80.degree. C. using a peroxide.Type: GrantFiled: October 15, 1991Date of Patent: October 13, 1992Assignee: Daicel Chemical Industries, Ltd.Inventors: Takaaki Fujiwa, Tomohisa Isobe
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Patent number: 4835213Abstract: A process for producing a lactone polymer which comprises reacting an ester compound synthesized from an alcohol and an acid or acid anhydride thereof with a lactone and a ring-opening polymerization initiator without being accompanied by condensation. The thus produced lactone polymer is effective for preventing shrinkage of thermosetting resins, particularly unsaturated polyester resins.Type: GrantFiled: February 26, 1987Date of Patent: May 30, 1989Assignee: Daicel Chemical Industries, Ltd.Inventors: Takaaki Murai, Shoji Watanabe, Kimio Inoue, Tomohisa Isobe, Naoki Nakashima, Takuya Miho, Yoshiyuki Ikemoto
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Patent number: 4703338Abstract: A resin composition is suitable to seal an electronic device, when cured, and comprises:(a) an unsaturated alicyclic epoxy ester compound obtained by reacting an alicyclic epoxy compound having at least two epoxy groups in the molecule with 0.5 to 1.1 equivalent, per equivalent of the epoxy group, of acrylic or methacrylic acid,(b) a polymerizable vinyl monomer, and(c) a photopolymerization initiator.Type: GrantFiled: June 10, 1986Date of Patent: October 27, 1987Assignee: Daicel Chemical Industries, Ltd.Inventors: Yosuke Sagami, Akira Yamamoto, Shoji Watanabe, Tomohisa Isobe, Susumu Funato
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Patent number: 4663429Abstract: A process for producing a lactone polymer which comprises reacting an ester compound synthesized from an alcohol and an acid or acid anhydride thereof with a lactone and a ring-opening polymerization initiator without being accompanied by condensation. The thus produced lactone polymer is effective for preventing shrinkage of thermosetting resins, particularly unsaturated polyester resins.Type: GrantFiled: July 31, 1985Date of Patent: May 5, 1987Assignee: Daicel Chemical Industries, Ltd.Inventors: Takaaki Murai, Shoji Watanabe, Kimio Inoue, Tomohisa Isobe, Naoki Nakashima, Takuya Miho, Yoshiyuki Ikemoto