Patents by Inventor Tatsuhiko Ozaki
Tatsuhiko Ozaki 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: 6413698Abstract: A photohardenable resin composition comprising (A) a urethanated acrylic compound represented by formula (I): (A)a—C—(R)4−a wherein R is H or alkyl; a is 3 or 4; and A represents a group of formula (II): wherein D represents —CH2CH2O—, —CH2CH(CH3)O—, —CH2CH2COO— or —(CH2)6COO—; E represents —CH2CH2O—, —CH2CH(CH3)O—, —COCH2CH2O— or —CO(CH2)6O—; G represents a diol or triol residual group; J represents a divalent or trivalent and substituted or unsubstituted hydrocarbon group; L represents —(CH2CH2O)h— (h: integer of 1 to 4), —(CH2CH(CH3)O)j— (j: integer of 1 to 4), or —(CH2CH2O)k—(CH2CH(CH3)O)m— (k, m: integer of 1 to 3 (k+m=2, 3 or 4); b, c, and d are each 0 or 1 (b+c+d=1, 2 or 3); e is 0, 1 or 2; f is 0 or 1 (e+f=1 or 2); and g is 1 or 2, and (B) a radical polymerizable compound at a (A) : (B) rType: GrantFiled: January 6, 2000Date of Patent: July 2, 2002Assignees: Teijin Seiki Co., Ltd., Takemoto Yushi Kabushiki Kaisha, Shin-Nakamura Chemical Co., Ltd.Inventors: Yorikazu Tamura, Tsuneo Hagiwara, Makoto Ohtake, Minoru Shinoda, Toshiharu Suzuki, Tatsuhiko Ozaki, Yasushi Ishihama, Takayuki Nakamura
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Patent number: 5929130Abstract: Photocurable resin compositions capable of producing plastic molds with improved durability by stereolithography in the presence of a photoinitiator includes unsaturated urethane of a specified kind, vinyl monomer of a specified kind, a filler and salt of phosphoric acid ester of specified kinds at a specified ratio.Type: GrantFiled: June 28, 1996Date of Patent: July 27, 1999Assignee: Takemoto Yushi Kabushiki Kaisha & Teijin Seiki Co., Ltd.Inventors: Toshiharu Suzuki, Tatsuhiko Ozaki, Hirokazu Matsueda, Yorikazu Tamura, Tsuneo Hagiwara
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Patent number: 5863486Abstract: In a process for producing a three-dimensional photohardened object by forming a layer of photocurable resin composition containing a photocurable liquid, a filler and a photoinitiator, photohardening at least a portion of this layer by exposing it to actinic radiation, and thereafter repeating the process of forming thereabove a new layer of photocurable resin composition and photohardening at least a portion of this layer by exposing it to actinic radiation, the property of the photocurable resin composition to become level can be improved by adding phosphoric acid ester of a specified structure at a specified rate.Type: GrantFiled: May 8, 1997Date of Patent: January 26, 1999Assignee: Takemoto Yushi Kabushiki KaishaInventors: Tatsuhiko Ozaki, Toshiharu Suzuki, Hirokazu Matsueda
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Patent number: 5807519Abstract: A plastic mold is produced by first repeating the process of forming a layer of a photocurable resin composition of a specified kind and exposing it to actinic radiation to at least partially photocure it to produce a photocured layered structure having a glass transition temperature of 70.degree.-120.degree. C. This structure is then subjected to a post-cure process at a temperature high than the glass transition temperature by 30.degree.-100.degree. C. Plastic molds made by this method have superior heat distortion temperature and tensile elastic modulus.Type: GrantFiled: June 19, 1997Date of Patent: September 15, 1998Assignees: Takemoto Yushi Kbushiki Kaisha, Teijin Seiki Co., Ltd.Inventors: Toshiharu Suzuki, Tatsuhiko Ozaki, Hirokazu Matsueda, Yorikazu Tamura, Tsuneo Hagiwara
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Patent number: 5731388Abstract: Photocurable resins containing unsaturated urethane of a specified form and vinyl monomer which is N-(meth)acryloylmorpholine or its mixture with di-ol di(meth)acrylate at a rate within a specified range and compositions containing such a resin and a filler such as solid particles and/or inorganic whiskers of specified kinds at a specified rate are capable of yielding stereo lithographed objects with improved mechanical and thermal properties and form precision.Type: GrantFiled: November 7, 1995Date of Patent: March 24, 1998Assignee: Takemoto Yushi Kabushiki KaishaInventors: Toshiharu Suzuki, Tatsuhiko Ozaki, Hirokazu Matsueda
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Patent number: 5591563Abstract: Photocurable resins containing unsaturated urethane of a specified form and vinyl monomer which is N-(meth)acryloylmorpholine or its mixture with di-ol di(meth)acrylate at a rate within a specified range and compositions containing such a resin and a filler such as solid particles and/or inorganic whiskers of specified kinds at a specified rate are capable of yielding stereolithographed objects with improved mechanical and thermal properties and form precision.Type: GrantFiled: October 30, 1995Date of Patent: January 7, 1997Assignee: Takemoto Yushi Kabushiki KaishaInventors: Toshiharu Suzuki, Tatsuhiko Ozaki, Hirokazu Matsueda
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Patent number: 5447984Abstract: Curable polymer mortar or concrete compositions with improved workability and processability use polymerizable liquid resin composed of unsaturated urethane of a specified form and vinyl monomers as binder and also contain an inorganic powder filler, aggregates and a viscosity reducer of a specified kind and a low shrinking agent of a specified kind each at a specified rate. Cured compositions with improved accuracy in measurements, strength and water absorption can be obtained from such compositions. Self-leveling property can also be provided.Type: GrantFiled: November 28, 1994Date of Patent: September 5, 1995Assignee: Takemoto Yushi Kabushiki KaishaInventors: Yoshihiko Ohama, Katsunori Demura, Hirokazu Matsueda, Tatsuhiko Ozaki, Atsushi Kodama
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Patent number: 5382619Abstract: A polymerizable composition contains unsaturated urethane shown by Formula (1) given below, vinyl monomer which is copolymerizable with this unsaturated urethane, and an inorganic powder filler at weight ratio of (unsaturated urethane)/(vinyl monomer)=10/90-90/10, the inorganic powder filler being 30-300 weight parts with respect to 100 weight parts of the sum of the unsaturated urethane and vinyl monomer: ##STR1## where X is a residual group obtained by removing isocyanate groups from polyisocyanate; Y is a residual group obtained by removing hydroxyl groups from polyol; R.sup.1 is a residual group obtained by removing hydroxyl group from non-radical polymerizable mono-ol having aliphatic hydrocarbon group with 6-22 carbon atoms; R.sup.2 is H or CH.sub.3 ; and p, q and r are each an integer 1-3 such that 2.ltoreq.p+q.ltoreq.4 and qr.gtoreq.2. In-mold cured products obtained from such a polymerizable composition have superior external appearance and water-resistance, and their mold shrinkage is small.Type: GrantFiled: April 28, 1993Date of Patent: January 17, 1995Assignee: Takemoto Yushi Kabushiki KaishaInventors: Yuji Takayama, Hirokazu Matsueda, Masato Sugiura, Tatsuhiko Ozaki, Hirotaka Wada, Toshiharu Suzuki, Iwao Komiya
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Patent number: 5331041Abstract: A polymerizable composition contains unsaturated urethane shown by Formula (1) given below, vinyl monomer which is copolymerizable with this unsaturated urethane, and an inorganic powder filler at weight ratio of (unsaturated urethane)/(vinyl monomer)=10/90-90/10, the inorganic powder filler being 30-300 weight parts with respect to 100 weight parts of the sum of the unsaturated urethane and vinyl monomer: ##STR1## where R.sup.1 is hydrogen atom or methyl group; X is a residual group obtained by removing isocyanate groups from diisocyanate; Y is a residual group obtained by removing hydroxyl groups from non-radical polymerizable di-ol or tri-ol of a specified kind; Z is an organic group in the form of (R.sup.2 O).sub.m or R.sup.3 O, R.sup.2 being an alkylene group with 2-4 carbon atoms, R.sup.3 being an alkylene group with 2-12 carbon atoms, and m being an integer 2-10; and n is 2 or 3.Type: GrantFiled: April 22, 1993Date of Patent: July 19, 1994Assignee: Takemoto Yushi Kabushiki KaishaInventors: Yuji Takayama, Hirokazu Matsueda, Masato Sugiura, Tatsuhiko Ozaki, Hirotaka Wada, Toshiharu Suzuki
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Patent number: 5237029Abstract: Radical polymerizable liquid resins contain unsaturated urethane of a specified structure and vinyl monomers at weight ratio of (unsaturated urethane)/(vinyl monomers)=10/90-90/10. The unsaturated urethane has (meth)acryloyl and higher aliphatic hydrocarbon groups in its molecule, and the vinyl monomers are copolymerizable with this unsaturated urethane.Type: GrantFiled: March 16, 1992Date of Patent: August 17, 1993Assignee: Takemoto Yushi Kabushiki KaishaInventors: Yuuji Takayama, Hirokazu Matsueda, Masato Sugiura, Tatsuhiko Ozaki, Hirotaka Wada, Iwao Komiya
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Patent number: 5223565Abstract: Molded products with improved dimensional stability and surface property can be obtained by in-mold curing of a polymerizable composition containing unsaturated urethane of a specified structure, alkyl (meth)acrylate, and a thermoplastic macromolecular compound capable of dissolving in or swelling by impregnating alkyl (meth)acrylate. These components are contained at specified weight ratio. The mold is initially at temperature 30.degree..about.120.degree. C. and the curing is effected in the presence of a radical initiator.Type: GrantFiled: May 23, 1991Date of Patent: June 29, 1993Assignee: Takemoto Yushi Kabushiki KaishaInventors: Yuuji Takayama, Hirokazu Matsueda, Maseto Sugiura, Tatsuhiko Ozaki, Hirotaka Wada, Iwao Komiya
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Patent number: 5209826Abstract: A steam stripping fraction of sesame seed oil with increased concentration of sesamin and episesamin is used in a molecular distillation process to obtain a fraction containing more than 70 weight % of sesamin and episesamin. The steam stripping fraction is preferably obtained by a steam stripping process wherein the temperature (t.degree. C.) of the sesame seed oil and the pressure (P mmHg) for the process are such that {(4.24.times.10.sup.3)/(9.41-log P)}-273 .ltoreq.t.ltoreq.280 and 0.5.ltoreq.P.ltoreq.20.Type: GrantFiled: July 28, 1992Date of Patent: May 11, 1993Assignee: Takemoto Yushi Kabushiki KaishaInventors: Tatsuhiko Ozaki, Yasunari Hoshii, Hirokazu Matsueda
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Patent number: 5185417Abstract: Unsaturated urethane having specified molecular structure shown by Formula (1) given below and vinyl monomers which are copolymerizable with such unsaturated urethane can form together polymerizable compositions which, as well as in-mold cured products therefrom, have improved characteristics such as compatibility between the constituents and water resistance: ##STR1## where X is a residual group obtained by removing the hydroxyl groups from a trihydric or tetrahydric polyol; R.sup.1 and R.sup.3 are each H or CH.sub.3 ; R.sup.2 is higher aliphatic hydrocarbon group with 5.about.21 carbon atoms; p and q are each 1 or 2; r is an integer 0.about.2 such that p+q+r=3 or 4 and p+r=2 or 3; and a is an integer 2.about.4.Type: GrantFiled: April 9, 1992Date of Patent: February 9, 1993Assignee: Takemoto Yushi, Kabushiki KaishaInventors: Yuuji Takayama, Hirokazu Matsueda, Masato Sugiura, Tatsuhiko Ozaki, Hirotaka Wada, Iwao Komiya
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Patent number: 5164448Abstract: Curable unsaturated polyester resin compositions from which molded products with superior surface smoothness can be obtained include a block copolymer of a specified form, an unsaturated polyester, a vinyl monomer, a filler, a curing catalyst and a reinforcing fiber. The block copolymer is of the form A--(B).sub.n where A is non-hydrogenated polyisoprene block having viscosity average molecular weight of 10000 or more, B is saturated polyester block obtainable by condensation of organic dicarboxylic anhydride and 1,2-epoxide, more than 50 mol % of terminal groups of the polyester block being carboxylic acid group, A and B are connected by ester linkage and n is not less than 2. Block copolymers of this type can be formed by starting with carboxylic acid or hydroxyl group in polyisoprene and by alternate condensation of organic dicarboxylic anhydride and 1,2-epoxide.Type: GrantFiled: September 19, 1991Date of Patent: November 17, 1992Assignees: Takeda Chemical Industries, Ltd., Toyota Jidosha Kabushiki Kaisha, Takemoto Yushi Kabushiki KaishaInventors: Yasuhiro Mishima, Hisayuki Iwai, Kenichi Nishino, Sanzi Aoki, Mitsuo Kinoshita, Tatsuhiko Ozaki
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Patent number: 5070147Abstract: A graft copolymer, which is effective as an additive to unsaturated polyester resins, contains 10-80 weight % of a macromonomer of a specified kind, 20-89.9 weight % of a vinyl monomer of another specified kind, and 0.1-5 weight % of vinyl monomers of still other kinds. If necessary, up to 40 weight % of still another constituent of a specified kind may be contained.Type: GrantFiled: August 30, 1989Date of Patent: December 3, 1991Inventors: Tatsuhiko Ozaki, Hirotaka Wada, Fumitoshi Sugiura
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Patent number: 5064900Abstract: A curable unsaturated polyester resin composition contains graft copolymers each having 10-60 weight % of a first constituent given by ##STR1## 38-89.7 weight % of a second constituent given by ##STR2## and 0.3-2 weight % of a third constituent which is a vinyl monomer unit having carboxylic acid or carboxylic anhydride groups, unsaturated polyester, vinyl monomer, a filler, a curing catalyst, and reinforcing fibers, where either of R.sup.1 and R.sup.2 is H, the other being either H or CH.sub.3, R.sub.3 is ethylene group or propylene group, R.sup.4 is hydrocarbon group with 1-18 carbton atoms, R.sup.5 is alkyl group with 1-4 carbon atoms, R.sup.6 is alkyl group with 1-3 carbon atoms, m is 6-90 and n is 1-5.Type: GrantFiled: January 19, 1990Date of Patent: November 12, 1991Inventors: Hisayuki Iwai, Yasuhrio Mishima, Ken Hatta, Kenichi Nishino, Sanji Aoki, Tatsuhiko Ozaki, Hirotaka Wada
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Patent number: 4708820Abstract: Phenol-type natural antioxidative materials containing analogs of sesamin or sesamolin are manufactured by processing a processed sesame speed product with an acid catalyst and subsequently condensing and separating the desired materials by a physical means such as extraction, distillation and adsorption.Type: GrantFiled: November 27, 1985Date of Patent: November 24, 1987Assignee: Takemoto Yushi Kabushiki KaishaInventors: Mitsuo Namiki, Toshihiko Osawa, Yasuko Fukuda, Tatsuhiko Ozaki
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Patent number: 4649206Abstract: This invention relates to a lignan compound having antioxidative characteristics, an antioxidant having this lignan compound as active component, and antioxidants having as active component a product which contains this lignan compound and is obtained by causing .beta.-glucosidase to react with crushed sesame seeds or a solvent extract thereof.Type: GrantFiled: September 3, 1985Date of Patent: March 10, 1987Assignee: Takemoto Yushi Kabushiki KaishaInventors: Mitsuo Namiki, Toshihiko Osawa, Yasuko Fukuda, Tatsuhiko Ozaki