Patents by Inventor Tadashi Hikasa
Tadashi Hikasa 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: 20090186232Abstract: An emulsion comprising a dispersoid dispersed in water together with an emulsifier, wherein the dispersoid is an olefin copolymer containing a structural unit derived from ethylene, linear ?-olefin, or ethylene and linear ?-olefin, and a structural unit derived from the following vinyl compound (I), or an olefin copolymer modified material obtained by further graft-polymerizing unsaturated carboxylic acids to the olefin copolymer, and the volume-based median diameter of the dispersoid contained in the emulsion is 0.01 to 1 ?m. CH2?CH—R??(I) (wherein, R in the vinyl compound (I) represents a secondary alkyl group, tertiary alkyl group or alicyclic hydrocarbon group.).Type: ApplicationFiled: April 10, 2007Publication date: July 23, 2009Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED, SUMIKA CHEMTEX COMPANY, LIMITEDInventors: Yoshihito Okubo, Kazutaka Kusunoki, Tatsuo Mitsutake, Hideo Narahara, Tadashi Hikasa
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Patent number: 5744231Abstract: An integrally molded composite article comprised of (I) a nonfoam layer formed from a thermoplastic elastomer powder composition (A) and (II) a foam layer formed from a foamable composition comprised of (i)(B) a thermoplastic synthetic resin powder, and (C) a heat decomposable foaming agent or (ii)(B) a thermoplastic synthetic resin powder, (C) a heat decomposable foaming agent and (D) a liquid coating agent, wherein the thermoplastic elastomer powder (A) is comprised of a composition of an ethylene-.alpha.-olefin copolymer rubber and a polyolefin resin or a thermoplastic elastomer powder comprised of a partially cross-linked composition of an ethylene-.alpha.-olefin copolymer rubber and a polyolefin resin, the thermoplastic elastomer powder having a complex dynamic viscosity .eta.*(1) at 250.degree. C. and a frequency of 1 radian/sec of not more than 1.5.times.10.sup.5 poise and having a Newtonian viscosity index n, calculated by the following formula using the above-mentioned complex dynamic viscosity .eta.Type: GrantFiled: January 31, 1996Date of Patent: April 28, 1998Assignee: Sumitomo Chemical Company, LimitedInventors: Toshio Igarashi, Sueharu Shinohara, Masayuki Tatsumi, Tadashi Hikasa, Hiroaki Mendori
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Patent number: 5602203Abstract: An olefinic resin composition which comprises 100 parts by weight of a thermoplastic olefin elastomer consisting of a polyolefin resin and an olefinic copolymer rubber and 0.5 to 30 parts by weight of a modified polyolefin obtained by reacting an unsaturated carboxylic acid (anhydride)-modified polyolefin with an aminoalcohol represented by the formula H.sub.2 N--R--OH in which R is an alkylene, arylene or aralkylene group having 18 or less carbon atoms. The olefinic resin composition can give a molded article which can be satisfactorily coated with a coating material without a primer and has excellent heat fusibility to various resin and metals.Type: GrantFiled: March 1, 1995Date of Patent: February 11, 1997Assignee: Sumitomo Chemical Company, LimitedInventors: Tatsuo Hamanaka, Tadashi Hikasa, Yoshitsugu Takai, Tetsuya Yamada
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Patent number: 5585431Abstract: A thermoplastic elastomer powder composition for powder molding, comprising 100 parts by weight of the following thermoplastic elastomer powder (A) and 0.05 to 20 parts by weight of a fine powder having an average particle diameter of 30 .mu.m or less:(A) (i) a powder of a thermoplastic elastomer comprising a composition composed of an ethylene-.alpha.-olefin copolymer rubber and a polyolefin resin or (ii) a powder of a thermoplastic elastomer comprising a partially crosslinked composition composed of an ethylene-.alpha.-olefin copolymer rubber and a polyolefin resin, the thermoplastic elastomer powder having a complex dynamic viscosity .eta.*(1), as measured at a frequency of 1 radian/sec and at 250.degree. C., of 1.5.times.10.sup.5 poise or less and a Newtonian viscosity index n, calculated from the following formula by using the above-mentioned complex dynamic viscosity .eta.*(1) and the complex dynamic viscosity .eta.*(100) measured at a frequency of 100 radian/sec of 0.67 or less:n=(log.eta.*(1)-log.eta.Type: GrantFiled: October 7, 1992Date of Patent: December 17, 1996Assignee: Sumitomo Chemical Company, LimitedInventors: Toshio Igarashi, Sueharu Shinohara, Masayuki Tatsumi, Tadashi Hikasa, Hiroaki Mendori
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Patent number: 5532055Abstract: An integrally molded composite article comprised of (I) a nonfoam layer formed from a thermoplastic elastomer powder composition (A) and (II) a foam layer formed from a foamable composition comprised of (i)(B) a thermoplastic synthetic resin powder, and (C) a heat decomposable foaming agent or (ii)(B) a thermoplastic synthetic resin powder, (C) a heat decomposable foaming agent and (D) a liquid coating agent, wherein the thermoplastic elastomer powder (A) is comprised of a composition of an ethylene-.alpha.-olefin copolymer rubber and a polyolefin resin or a thermoplastic elastomer powder comprised of a partially cross-linked composition of an ethylene-.alpha.-olefin copolymer rubber and a polyolefin resin, the thermoplastic elastomer powder having a complex dynamic viscosity .eta.*(1) at 250.degree. C. and a frequency of 1 radian/sec of not more than 1.5.times.10.sup.5 poise and having a Newtonian viscosity index n, calculated by the following formula using the above-mentioned complex dynamic viscosity .eta.Type: GrantFiled: November 13, 1992Date of Patent: July 2, 1996Assignee: Sumitomo Chemical Company, LimitedInventors: Toshio Igarashi, Sueharu Shinohara, Masayuki Tatsumi, Tadashi Hikasa, Hiroaki Mendori
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Patent number: 5516582Abstract: A multilayer molded article having a body of a thermoplastic resin and a skin material which is laminated on a surface of said body and made of an olefin thermoplastic elastomer having 100% modulus (M100) at 23.degree. C. of from 20 to 60 kg/cm.sup.2 and a frictional resistance (tan .delta.) against a metal surface of 1.0 or lower which is backed with a foam layer, which has good appearance and also good weather resistance.Type: GrantFiled: July 12, 1991Date of Patent: May 14, 1996Assignee: Sumitomo Chemical Co., Ltd.Inventors: Tadashi Hikasa, Hiroaki Mendori, Takahisa Hara, Nobuhiro Usui
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Patent number: 5427864Abstract: A multilayer molded article comprising a body of a thermoplastic resin and a skin material which is laminated on a surface of said body and comprises an olefin thermoplastic elastomer having a complex viscosity (.eta.*) of from 1.0.times.104 to 5.0.times.104 poises at 200.degree. C. and a vibrational angular velocity of 100 rad/sec. and a Newtonean viscosity index (n) of from 0.6 to 0.8 in a vibrational angular velocity range between 50 and 200 rad/sec. both measured by a dynamic viscoelasticity measurement, which has good appearance.Type: GrantFiled: March 31, 1994Date of Patent: June 27, 1995Assignee: Sumitomo Chemical Company, LimitedInventors: Tadashi Hikasa, Hiroaki Mendori, Takahisa Hara, Nobuhiro Usui
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Patent number: 5407991Abstract: The invention provides an olefinic thermoplastic elastomer composition which is excellent in flexibility, processability into sheet and appearance of the resulting sheet and which is able to substitute for flexible polyvinyl chloride. The invention further provides a covering material for industrial parts comprising said composition and a laminate comprising said covering material.The composition comprises a partially crosslinked thermoplastic elastomer I containing an oil-extended olefinic copolymer rubber comprising an olefinic copolymer rubber having a Mooney viscosity of 200-350 or the thermoplastic elastomer I and a partially crosslinked thermoplastic elastomer II containing an oil-extended olefinic copolymer rubber comprising an olefinic copolymer rubber having a Mooney viscosity of 120 or higher and lower than 200 and the composition has a specific viscoelastic characteristics.Type: GrantFiled: October 26, 1993Date of Patent: April 18, 1995Assignee: Sumitomo Chemical Co., Ltd.Inventors: Tadashi Hikasa, Koji Yamashita, Satoru Hosoda, Kiyoshi Mitsui, Yuji Kanda
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Patent number: 5308699Abstract: A thermoplastic elastomer powder for powder slush molding, comprising an elastomer composition of an ethylene-.alpha.-olefin copolymer rubber and a polyolefin resin, wherein said elastomer composition has a complex dynamic viscosity .eta.*(1) as measured at a frequency of 1 radian/sec. in a dynamic viscoelasticity measurement at 250.degree. C., of 1.5.times.10.sup.5 poise or less, a Newtonian viscosity index n calculated from the following formula by using the complex dynamic viscosity .eta.*(1) at a frequency of 1 radian/sec. and the complex dynamic viscosity .eta.*(100) at a frequency of 100 radian/sec. of 0.67 or less:n=[log.eta.*(1)-log.eta.*(100)]/2.Type: GrantFiled: October 2, 1991Date of Patent: May 3, 1994Assignee: Sumitomo Chemical Company LimitedInventors: Tadashi Hikasa, Hiroaki Mendori, Tatsuo Hamanaka, Toshio Igarashi, Yuu Shida
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Patent number: 5308700Abstract: A thermoplastic elastomer powder for powder molding, comprising an elastomer composition of an ethylene-.alpha.-olefin copolymer rubber and a polyolefin resin, wherein said elastomer composition has a complex dynamic viscosity .eta.*(1) as measured at frequency of 1 radian/sec. in dynamic viscoelasticity measurement at 250.degree. C., of 1.5.times.10.sup.5 poise or less, a Newtonian viscosity index n calculated from the following formula by using the complex dynamic viscosity .eta.*(1) at a frequency of 1 radian/sec. and the complex dynamic viscosity .eta.*(100) at a frequency of 100 radian/sec. of 0.67 or less, and a hardness (shore D) of 45 or less:n={log.eta.*(1)-log.eta.*(100)}/2.Type: GrantFiled: October 2, 1991Date of Patent: May 3, 1994Assignee: Sumitomo Chemical Company LimitedInventors: Tadashi Hikasa, Hiroaki Mendori, Tatsuo Hamanaka, Toshio Igarashi, Yuu Shida
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Patent number: 5298211Abstract: Provided is a method for producing a thermoplastic elastomer composition excellent in flexibility, mechanical properties and extrusion moldability which comprises directly feeding a particulate olefinic copolymer rubber (A) having a particle shape index .alpha. defined below of 0.1-0.9 and an olefinic plastic (B) to a continuous kneading extruder to carry out melt kneading and then, feeding an organic peroxide to downstream side of said extruder to carry out dynamic crosslinking:.alpha.=D.sub.A /D.sub.Bwherein D.sub.A denotes bulk density of the particulate olefinic copolymer rubber (A) and D.sub.B denotes bulk density of the olefinic plastic (B).Type: GrantFiled: December 3, 1992Date of Patent: March 29, 1994Assignee: Sumitomo Chemical Company, LimitedInventors: Tatsuo Hamanaka, Noboru Komine, Tadashi Hikasa, Yuji Gotoh, Keitaro Kojima
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Patent number: 5292810Abstract: The present invention provides a thermoplastic elastomer composition having high thermal resistance. It comprises a thermoplastic graft copolymer of which main chain is constituted by a polymer having a glass transition temperature of 10.degree. C. or blow and side chain is constituted by an aromatic oligomer having a flow temperature of 100.degree. C. or above, and an olefinic polymer.Type: GrantFiled: October 19, 1992Date of Patent: March 8, 1994Assignee: Sumitomo Chemical Company, LimitedInventors: Kenji Manabe, Masahiro Niwano, Tadashi Hikasa
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Patent number: 5187224Abstract: A blend which comprises a partially crosslinked product of a mixture of an oil-extended olefinic copolymer rubber comprising an olefinic copolymer rubber having a 100.degree. C. Mooney viscosity 150-350, a polyolefin resin, a selectively hydrogenated block copolymer, and a specific mineral oil type softening agent has excellent flexibility of less than 45 in Shore A hardness. The blend is not tacky, nor does the softening agent bleed. An anti-static agent for polyolefins and/or a higher fatty acid amide may be included in the composition.Type: GrantFiled: April 8, 1991Date of Patent: February 16, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Tatsuo Hamanaka, Tadashi Hikasa, Koichiro Ibuki
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Patent number: 5180769Abstract: An olefinic thermoplastic elastomer composition which is excellent in mechanical properties and is substitutable for vulcanized rubbers is provided, which comprises a mixture comprising (A) 40-95% by weight of an oil-extended olefinic copolymer rubber comprising 100 parts by weight of an olefinic copolymer rubber having a Mooney viscosity (ML.sub.1+4 100.degree. C.) of 150-350 and 20-150 parts byw eight of a mineral oil and (B) 5-60% by weight of an olefinic plastic, said mixture being partially crosslinked by dynamic heat treatment in the presence of an organic peroxide. This composition gives superior molded articles free from bleeding of oil on the surface.Type: GrantFiled: March 19, 1992Date of Patent: January 19, 1993Assignee: Sumitomo Chemical Company LimitedInventors: Tadashi Hikasa, Koichiro Ibuki, Tatsuo Hamanaka, Motoo Mizumori
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Patent number: 5118753Abstract: An olefinic thermoplastic elastomer composition which is excellent in mechanical properties and is substitutable for vulcanized rubbers is provided, which comprises a mixture comprising (A) 40-95 % by weight of an oil-extended olefinic copolymer rubber comprising 100 parts by weight of an olefinic copolymer rubber having a Mooney viscosity (ML.sub.1+4 100.degree. C.) of 150-350 and 20-150 parts by weight of a mineral oil and (B) 5-60% by weight of an olefinic plastic, said mixture being partially crosslinked by dynamic heat treatment in the presence of an organic peroxide. This composition gives superior molded articles free from bleeding of oil on the surface.Type: GrantFiled: July 5, 1990Date of Patent: June 2, 1992Assignee: Sumitomo Chemical Company, LimitedInventors: Tadashi Hikasa, Koichiro Ibuki, Tatsuo Hamanaka, Motoo Mizumori
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Patent number: 4933389Abstract: The present invention provides a thermoplastic elastomer composition excellent in oil resistance. This composition comprises a partially crosslinked mixture of (A) an ethylene copolymer rubber comprising ethylene and an acrylate ester or a methacrylate ester and (B) an olefin polymer and, if necessary, (C) an olefin copolymer rubber.Type: GrantFiled: January 31, 1989Date of Patent: June 12, 1990Assignee: Sumitomo Chemical Company, LimitedInventors: Tadashi Hikasa, Koichiro Ibuki, Tatsuo Hamanaka, Masahiro Fukuyama
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Patent number: 4483939Abstract: A process for producing a polyolefin, which comprises polymerizing an olefin in the presence of a catalyst system comprising:(a) a solid catalyst component obtained by supporting a titanium compound and/or a vanadium compound on a solid product derived from the reaction of a phenol, an aromatic carboxylate ester, and a solid reaction product of an organomagnesium compound and an aryloxyaluminum compound represented by the general formula Al(OR.sup.1).sub.3, wherein R.sup.1 represents an aryl group having 6 to 20 carbon atoms; and(b) an organoaluminum compound.Type: GrantFiled: August 9, 1982Date of Patent: November 20, 1984Assignee: Sumitomo Chemical Company, LimitedInventors: Kazuo Baba, Kizuku Wakatsuki, Toshimi Sato, Tadashi Hikasa
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Patent number: 4350802Abstract: A catalyst system useful for the polymerization of olefins which comprises(A) at least one organometallic compound of a typical metal belonging to I, II and III group of Periodic table,(B) a reaction production of (i) a solid organomagnesium compound of the formula: MgR.sub.l X.sub.2-1..alpha.D wherein R is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom, D is a Lewis base, l is a number in the range of 0<l<2 and .alpha. is a number in the range of 0.ltoreq..alpha.<1.5, (ii) a phenol compound, (iii) a Lewis base, and (iv) a titanium compound and/or vanadium compound, and optionally(C) a Lewis base in an amount of up to 1 mole to 1 mole of the component (A),and a process for homo- or copolymerization of olefins by using the catalyst system. The catalyst system of the present invention shows excellent activities not only per the transition metal compound but also per the solid catalyst and can give polyolefins having a high stereo-regularity.Type: GrantFiled: March 28, 1980Date of Patent: September 21, 1982Assignee: Sumitomo Chemical Company, LimitedInventors: Kazuo Baba, Kizuku Wakatsuki, Tadashi Hikasa
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Patent number: 4339560Abstract: A process for the polymerization of an olefin which comprises polymerizing an olefin in the presence of a catalyst system consisting essentially of(A) an organoaluminum compound represented by the formula: AlR.sub.m.sup.1 X.sub.3-m.sup.1 wherein R.sup.1 is a hydrocarbon group having 1 to 8 carbon atoms, X.sup.1 is a halogen atom or an alkoxy group having 1 to 8 atoms and m is a number in the range of 1 to 3,(B) a product prepared by the reaction of (i) a titanium compound selected from the group represented by the formula: Ti(OR.sup.2).sub.p X.sub.q.sup.2 wherein R.sup.2 is a hydrocarbon group having 1 to 8 carbon atoms, X.sup.2 is a halogen atom and p and q are each a number satisfying the following ranges: 0.ltoreq.p.ltoreq.4, 0.ltoreq.q.ltoreq.Type: GrantFiled: July 3, 1980Date of Patent: July 13, 1982Assignee: Sumitomo Chemical Company, LimitedInventors: Kazuo Baba, Kizuku Wakatsuki, Tadashi Hikasa
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Patent number: 4051225Abstract: A method for heat recovery in the processes of the removal of nitrogen oxides from exhaust gases containing sulfur oxides and nitrogen oxides by a catalytic or non-catalytic reduction thereof with ammonia. After passing through the reaction zone for the reduction of nitrogen oxides the down flow gases are subjected to the submitted air in a heat exchanger. The process is characterized in that the molar ratio of ammonia to sulfuric anhydride and the concentration of steam in the gases at the inlet of the heat exchanger is controlled in the range of O<NH.sub.3 /SO.sub.3 <2, preferably O<NH.sub.3 /SO.sub.3 <1.5 and more than 12% by volume, preferably more than 15% by volume, respectively, and thereby the process can continuously proceed without the production of ammonium sulfate and the deposition or adhesion thereof onto the surface of the various devices in the apparatus therefor.Type: GrantFiled: December 17, 1975Date of Patent: September 27, 1977Assignee: Sumitomo Chemical Company, LimitedInventors: Shujiro Shiga, Takeshi Katsumata, Yasushi Okamoto, Tadashi Hikasa