Patents by Inventor Eiichiro Takiyama
Eiichiro Takiyama 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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Publication number: 20030013789Abstract: A process for production of an oligo(meth)acrylate-containing resin, whereby a composition containing (meth)acrylic acid, an alkylene monoepoxide and a polybasic acid anhydride, a composition prepared by adding a polybasic acid anhydride to a composition containing an unsaturated monoalcohol obtained by reaction of (meth)acrylic acid and an alkylene monoepoxide, or a composition containing an unsaturated oligomer with an unsaturated group and a hydroxyl group, obtained by reaction of (meth)acrylic acid, an alkylene monoepoxide and a polybasic acid anhydride, is reacted at a temperature from 140° C. to 210° C. using a catalyst containing an organic and/or inorganic antimony compound.Type: ApplicationFiled: June 20, 2002Publication date: January 16, 2003Applicant: DJK LABORATORIES INC.Inventors: Eiichiro Takiyama, Susumu Yoshimura, Shinichi Otsuka
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Patent number: 5837755Abstract: A urea-resin composition comprising a urea-formaldehyde reaction product, cellulose material, and at least one substance selected from the group cosisting of .alpha.-amino acid, powdered collagen and gelatin. The present invention provides urea-resin compositions which, having a property to harden under heating, are themselves biodegradable and have sufficient physical properties to be applied for practical purposes.Type: GrantFiled: March 29, 1996Date of Patent: November 17, 1998Assignee: Showa Highpolymer Co., Ltd.Inventors: Eiichiro Takiyama, Yoshitaka Hatano
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Patent number: 5714569Abstract: An aliphatic polyester resin having a .lambda. value representing the magnitude of non-linearity of elongational viscosity of 1.5 to 8.0, said .lambda. value being defined by the following formula (1):.lambda.=.lambda..sub.1 /.lambda..sub.0 ( 1)wherein .lambda..sub.0 denotes the elongational viscosity at the transition point and .lambda..sub.1 denotes the elongational viscosity when strain become twice that of a transition point, said transition point meaning a point between a linear region, i.e., the infinitesimal-deformation region, and a non-linear region, i.e., the large-deformation region. According to the present invention, an aliphatic polyester resin having excellent formability and forming stability as well as good biodegradability is provided.Type: GrantFiled: August 21, 1996Date of Patent: February 3, 1998Assignees: Showa Denko K.K., Showa Highpolymer Co., Ltd.Inventors: Mitsuhiro Imaizumi, Hideharu Kimura, Ryutaro Fujihira, Yasushi Ichikawa, Jun Suzuki, Yoshihiro Moteki, Takashi Fujimaki, Eiichiro Takiyama
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Patent number: 5530058Abstract: An aliphatic polyester resin composition having a low combustion beat, characterized in that a filler is mixed with an aliphatic polyester having a number-average molecular weight of at least 10,000, synthesized from glycol and aliphatic polybasic acid or acid derivative thereof. A sheet formed from the composition bas excellent tensile strength, stiffness and impact strength as well as being biodegradable.Type: GrantFiled: December 14, 1994Date of Patent: June 25, 1996Assignee: Showa Highpolymer Co., Ltd.Inventors: Mitsuhiro Imaizumi, Masataka Kotani, Ryosuke Kamei, Eiichiro Takiyama
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Patent number: 5525409Abstract: Nonwoven fabrics made of an aliphatic polyester having a melt viscosity of 5.0.times.10.sup.2 -2.times.10.sup.4 poises at a temperature of 190.degree. C. at a shear rate of 100 sec.sup.-1 and a melting point of 70.degree.-190.degree. C. The nonwoven fabric has biodegradability when it is buried in the ground and it is also excellent in tensile strength and tear propagation strength. Thus, the nonwoven fabric of the present invention is useful for sanitary materials, medical materials, packaging materials, agricultural covering materials, filters, oil absorption materials, materials for a daily life, padding cloth materials for clothes, cell separators, drain sheets for constructions and the like.Type: GrantFiled: May 23, 1995Date of Patent: June 11, 1996Assignee: Showa Highpoymer Co., Ltd.Inventors: Takeshi Takahashi, Shigenori Terazono, Ryosuke Kamei, Eiichiro Takiyama
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Patent number: 5439986Abstract: A thermo-curable resin composition which contains (a) an aromatic polyamide oligomer having polymerizable unsaturated group(s) at both terminals or within side chain(s), (b) a maleimide compound and (c) an epoxy resin; and a copper foil laminate which comprises impregnating said composition into substrates, followed by bonding by co-pressing copper foils is provided. The copper-clad laminate of the present invention has excellent adhesiveness to copper foil, heat resistance and electrical properties.Type: GrantFiled: November 16, 1993Date of Patent: August 8, 1995Assignee: Showa Highpolymer Co., Ltd.Inventors: Tadayuki Hosogane, Hiroshi Nakajima, Eiichiro Takiyama
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Patent number: 5436056Abstract: A method for producing a high molecular weight aliphatic polyester, wherein:(A) 100 parts by weight of polyester (a) with a number average molecular weight of at least 10,000, and a weight average molecular weight of at least 30,000, and with end-groups that are substantially hydroxyl groups, and with a melting point of at least 60.degree. C., the polyester (a) having been obtained by reacting the following three ingredients: (i) a glycol ingredient; (ii) an aliphatic dicarboxylic acid ingredient; and (iii) a trifunctional or tetrafunctional ingredient reacts with(B) 0.1-3 parts by weight of a poly-isocyanate in a melted state of the polyester (a).The method provides a high molecular weight aliphatic polyester which has good properties and a melt viscosity required for molding and forming and has a wide molecular weight distribution. The high molecular weight aliphatic polyester is applicable to a variety of fields, such as films, moldings and formings, fibers, etc.Type: GrantFiled: August 18, 1993Date of Patent: July 25, 1995Assignee: Showa Highpolymer Co., Ltd.Inventors: Eiichiro Takiyama, Yoshitaka Hatano, Takashi Fujimaki, Shigekatu Seki, Takao Hokari, Tadayuki Hosogane, Noriaki Harigai
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Patent number: 5391644Abstract: Injection-molded articles consisting of an aliphatic polyester having a melt viscosity of 6.times.10.sup.2 -2.times.10.sup.4 poises at a temperature of 190.degree. C. at a shear rate of 1000 sec.sup.-1 and a melting point of 70.degree.-190.degree. C. The present invention provides injection-molded articles excellent in heat stability and mechanical strength as well as having biodegradability which can be used for industrial parts, automotive members, food and beverage containers, gardening pots and the like.Type: GrantFiled: April 20, 1993Date of Patent: February 21, 1995Assignee: Showa Highpolymer Co., Ltd.Inventors: Tetsuo Yasuda, Eiichiro Takiyama
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Patent number: 5374259Abstract: A biodegradable disposable diaper comprising a combination of a liquid absorbing material, a liquid permeable surface material and an leakproof backing material, said liquid permeable material being formed of an aliphatic polyester resin obtained by reacting an aliphatic saturated polyester prepolymer having an end group which is materially a hydroxyl group with a coupling agent or formed of said aliphatic polyester resin and an aliphatic saturated polyester resin which has not been treated by said coupling agent. The disposable diaper has excellent mechanical strength, softness, feel of touch, productivity as well as biodegradability, air permeability and waterproofness.Type: GrantFiled: April 20, 1993Date of Patent: December 20, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Takeshi Takahashi, Shigenori Terazono, Takashi Fujimaki, Eiichiro Takiyama
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Patent number: 5371172Abstract: An unsaturated alkyd having a number-average molecular weight of at least 5000 and having terminal carboxyl groups is provided by esterification and then deglycolization reaction of an .alpha.,.beta.-unsaturated polybasic acid or an polyhydroxy alcohol followed by reaction with polybasic acid anhydride to substitute more than 10 mole % of terminal hydroxyl groups with carboxyl groups. High molecular weight unsaturated polyester resin is also provided by formulating the unsaturated alkyd with a copolymerizable monomer such as styrene. The polyester resin can be widely used in a various applications by employing the excellent physical properties thereof.Type: GrantFiled: March 24, 1992Date of Patent: December 6, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Eiichiro Takiyama, Isamu Niikura, Takao Hokari
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Patent number: 5362765Abstract: Foamed thin materials such as foamed film and foamed fibrillated materials produced by extruding a composition consisting of 100 parts by weight of aliphatic polyester having a melt viscosity of 1.0.times.10.sup.3 -1.0.times.10.sup.5 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-200.degree. C., and 0.2-5 parts by weight of foaming agent. These foamed thin materials has biodegradability, excellent mechanical, insulating, touch and aesthetic properties. They are useful materials as insulating, packaging, oil absorbing materials and filters.Type: GrantFiled: March 31, 1994Date of Patent: November 8, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Toshio Taka, Yuichiro Yasukawa, Tetuya Takahashi, Akira Nakamura, Ryosuke Kamei, Eiichiro Takiyama
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Patent number: 5360663Abstract: Polyester laminates formed by coating by melt-extruding an aliphatic polyester having a melt viscosity of 1.0.times.10.sup.3 -1.0.times.10.sup.5 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-200.degree. C. on to paper or cloth. The resin can be coated on paper or cloth at a low temperature with firm adherency, and the sheet thus formed is biodegradable.Type: GrantFiled: April 20, 1993Date of Patent: November 1, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Yoshihiro Moteki, Nobutaka Fujiwara, Yukiharu Euruichi, Eiichiro Takiyama
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Patent number: 5349028Abstract: Polyester fiber consisting of an aliphatic polyester having a melt viscosity of 1.0.times.10.sup.2 -1.0.times.10.sup.4 poises at a temperature of 190.degree. C. at a shear rate of 1000 sec.sup.-1 and a melting point of 70-190.degree. C. The polyester fiber of the present invention exhibits biodegradability when buried in the ground. The amount of combustion heat generated on incineration is smaller than that of polyethylene and polypropylene. The polyester fiber of the present invention has excellent physical properties.Type: GrantFiled: April 20, 1993Date of Patent: September 20, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Tetuya Takahashi, Hitoshi Uda, Akira Nakamura, Ryosuke Kamei, Eiichiro Takiyama
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Patent number: 5348700Abstract: Flat and split yarn formed by extrusion molding, comprising as a main component an aliphatic polyester having a melt viscosity of 2.0.times.10.sup.3 -4.0.times.10.sup.4 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-190.degree. C. The present invention provides flat and split yarn having excellent in heat stability and mechanical strength as well as having biodegradability.Type: GrantFiled: April 20, 1993Date of Patent: September 20, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Akira Nakamura, Ryosuke Kamei, Takeshi Takahashi, Tetuya Takahashi, Shigenori Terazono, Eiichiro Takiyama
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Patent number: 5324556Abstract: Blow-molded articles consisting of an aliphatic polyester having a melt viscosity of 3.0.times.10.sup.3 -2.0.times.10.sup.5 poises at a temperature of 190.degree. C. at a shear rate of 100 sec.sup.-1 and a melting point of 70.degree.-190.degree. C. The present invention provides blow-molded articles excellent in heat stability and mechanical strength as well as having biodegradability which can be used for containers of detergents, cosmetics and the like, and industrial parts.Type: GrantFiled: April 20, 1993Date of Patent: June 28, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Toshiaki Hino, Katsutoshi Muramatsu, Eiichiro Takiyama
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Patent number: 5324794Abstract: An aliphatic polyester film which is synthesized from a glycol and an aliphatic polybasic acid having a melt viscosity of 2,000-100,000 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-200.degree. C. The film is excellent in heat stability and mechanical strength as well as biodegradability when buried in the earth; and has low combustion heat than polyethylene and polypropyrene.Type: GrantFiled: April 20, 1993Date of Patent: June 28, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Toshio Taka, Yuichiro Yasukawa, Eiichiro Takiyama
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Patent number: 5321052Abstract: Foamed thin materials such as foamed film and foamed fibrillated materials produced by extruding a composition consisting of 100 parts by weight of aliphatic polyester having a melt viscosity of 1.0.times.10.sup.3 -1.0.times.10.sup.5 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-200.degree. C., and 0.2-5 parts by weight of foaming agent. These foamed thin materials has biodegradability, excellent mechanical, insulating, touch and aesthetic properties. They are useful materials as insulating, packaging, oil absorbing materials and filters.Type: GrantFiled: April 20, 1993Date of Patent: June 14, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Toshio Taka, Yuichiro Yasukawa, Tetuya Takahashi, Akira Nakamura, Ryosuke Kamei, Eiichiro Takiyama
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Patent number: 5314969Abstract: A sheet formed by using as a main component an aliphatic polyester having a melt viscosity of 1.0.times.10.sup.3 -1.0.times.10.sup.6 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-190.degree. C. The sheet of the present invention is biodegraded when buried in soil and is excellent in mechanical properties and transparency. The sheet is also superior in non-absorbency of aroma as well as heat-sealability and formability.Type: GrantFiled: April 20, 1993Date of Patent: May 24, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Mitsuhiro Imaizumi, Masataka Kotani, Haruhiko Kondo, Takeshi Iwasa, Eiichiro Takiyama
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Patent number: 5314927Abstract: A method for producing polyester foamed articles comprising: heating and foaming a resin composition comprising a foaming agent, and an aliphatic polyester having a melt viscosity of 1.0.times.10.sup.3 -1.0.times.10.sup.6 poises at a temperature of 190.degree. C. and a shear rate of 100 sec.sup.-1, and having a melting point of 70.degree.-190.degree. C. Extrusion or forming in a mold using preexpanded beads can be applied. The foamed articles such as insulating boxes and cushioning materials have biodegradability and excellent mechanical properties such as tensile strength and cushioning properties.Type: GrantFiled: April 20, 1993Date of Patent: May 24, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Haruhiko Kondo, Mitsuhiro Imaizumi, Ryosuke Kamei, Hideharu Kimura, Eiichiro Takiyama
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Patent number: 5310782Abstract: A method for manufacturing a biodegradable high molecular weight aliphatic polyester. This method comprises the steps of: [A] synthesizing an aliphatic polyester having a number average molecular weight of at least 5,000 and/or a weight average molecular weight of at least 30,000 by reacting aliphatic or alicyclic glycol with aliphatic dicarboxylic acid or its anhydride, applying a 0.001-0.5 part by weight of organic or inorganic metallic compound as a catalyst with respect to 100 parts by weight of aliphatic polyester to be produced; [B] adding a 0.01-3 parts by weight of organic or inorganic phosphorus compound with respect to 100 parts by weight of aliphatic polyester upon completion of the reaction; and [C] reacting a 0.1-5 parts by weight of polyvalent isocyanate compound with 100 parts by weight of the aliphatic polyester so that the polyester has a number average molecular weight of at least 10,000 and/or a weight average molecular weight of at least 50,000.Type: GrantFiled: June 1, 1993Date of Patent: May 10, 1994Assignee: Showa Highpolymer Co., Ltd.Inventors: Eiichiro Takiyama, Takashi Fujimaki, Shigekatu Seki, Takao Hokari, Yoshitaka Hatano