Patents Assigned to Idemitsu Kosan Company
-
Patent number: 5112541Abstract: Microencapsulating lubricating fluids and additives and a method of preparing microencapsulated lubricants including the steps of preparing an emulsification medium, adding a lubricant to the emulsification medium, emulsifying the emulsification medium and lubricant to form an emulsion, adding a first solution including resorcinol and dimethylol urea to the emulsion, acidifying the first solution and emulsion, adding a second solution consisting of resorcinol and dimethylol urea to the acidified first solution and emulsion while vigorously stirring it to form a microcapsule suspension, adjusting the pH to be basic, filtering and washing the microcapsule suspension to separate the microcapsules from the solution, and drying the microcapsules.Type: GrantFiled: January 29, 1988Date of Patent: May 12, 1992Assignee: Idemitsu Kosan Company, Ltd.Inventor: David R. Friend
-
Patent number: 5108634Abstract: There is disclosed a lubricating oil composition which comprises, as main components, (A) 100 parts by weight of a base oil having a kinematic viscosity at 40.degree. C. of 5 to 500 cSt, a pour point of -30.degree. C. or lower and a viscosity index of 70 or more, or further a cloud point of -20.degree. C. or lower, and (B) 0.01 to 5 parts by weight of an alkyl group-substituted phenol compound a melting point of 20.degree. C. or lower.This lubricating oil composition has excellent high temperature stability and low temperature characteristics, and thus it is suitable for a refrigerator oil, a heat pump oil, etc.Type: GrantFiled: September 8, 1989Date of Patent: April 28, 1992Assignee: Idemitsu Kosan Company LimitedInventor: Hiromichi Seiki
-
Patent number: 5103064Abstract: A carbonyl compound is produced efficiently, stably and with good productivity by oxidizing a chain olefin in an alcoholic solvent in the presence of a catalyst system comprising palladium and a polyoxoanion as active components.Type: GrantFiled: September 4, 1990Date of Patent: April 7, 1992Assignee: Idemitsu Kosan Company LimitedInventors: Yoshinori Saito, Masanori Tsuzuki
-
Patent number: 5102957Abstract: A novel method is proposed for the preparation of a block copolymer of styrene and ethylene having a very narrow molecular weight distribution and controlled molar ratio of the styrene moiety to ethylene moiety in a high efficiency. The method comprises the steps of: (a) living-polymerizing styrene by using an organic lithium compound as a polymerization initiator; (b) admixing the polymerization mixture containing the living polymer of styrene with a tertiary diamine compound, such as N,N,N',N'-tetramethyl ethylene diamine; and (c) introducing ethylene monomer into the polymerization mixture to effect polymerization of ethylene on to the living polymer molecules of polystyrene.Type: GrantFiled: April 20, 1990Date of Patent: April 7, 1992Assignee: Idemitsu Kosan Company LimitedInventors: Kiyoshi Endo, Takayuki Otsu
-
Patent number: 5093201Abstract: The present invention provides a polyolefinic resin-coated carrier having a rough surface and containing a core material in a quantity of 90 or more % by weight. Said resin-coated layer may contain fine particles having a charge-controlling function and/or electrically conductive fine particles as additives.Type: GrantFiled: January 12, 1990Date of Patent: March 3, 1992Assignees: Minolta Camera Kabushiki Kaisha, Idemitsu Kosan Company LimitedInventors: Junji Ohtani, Junji Machida, Kazuo Ota, Satoshi Asahi, Hiroshi Hayashi, Kouichi Matono
-
Patent number: 5093295Abstract: The present invention provides a process for producing a homogeneous aluminoxane solution wherein an alkylaminoxane (A) obtained by reacting an organoaluminum compound with water and removing a solid residue by filtration is reacted with an organoaluminum compound (C) in the presence of an aromatic hydrocarbon solvent (B). According to the present invention, the gel-free homogeneous aluminoxane solution can be obtained and the catalytic activity thereof is not deteriorated during the storage.Type: GrantFiled: March 8, 1990Date of Patent: March 3, 1992Assignee: Idemitsu Kosan Company LimitedInventors: Norio Tomotsu, Masahiko Kuramoto
-
Patent number: 5091122Abstract: A method of preparing microencapsulated basic solutions including the steps of preparing a polymer which is hydrophobic at high pH values, preparing a basic solution, dissolving the polymer in an organic solvent, adding a surfactant to the polymer solution, adding the basic solution to the dissolved polymer, emulsifying the basic solution and dissolved polymer and spray drying the emulsion while stirring the emulsion.Type: GrantFiled: March 24, 1988Date of Patent: February 25, 1992Assignee: Idemitsu Kosan Company, Ltd.Inventor: David R. Friend
-
Patent number: 5089340Abstract: Disclosed is a novel polymer of this invention which comprises having a recurring unit represented by the formula: ##STR1## and having a reduced viscosity (.eta.sp/c) of 0.2 dl/g or more at 60.degree. C. in a solution of a concentration of 0.2 g/dl in p-chlorophenol as a solvent, a method for preparing the same which comprises reacting a dihalogenobenzonitrile represented by the formula: ##STR2## wherein X represents a halogen atom, with an alkali metal salt of resorcin represented by the formula: ##STR3## wherein M represents an alkali metal, in the presence of a solvent, and then treating the reaction product obtained by water or alcohol, and molding materials and molded products employing the polycyanoaryl ether.Type: GrantFiled: August 6, 1990Date of Patent: February 18, 1992Assignee: Idemitsu Kosan Company LimitedInventors: Shigeru Matsuo, Tomoyoshi Murakami, Thoru Bando, Kikuo Nagatoshi
-
Patent number: 5084585Abstract: The present invention relates to a process for preparing aluminoxane which comprises reacting an organoaluminum compound and water in a solvent system containing solvent having a higher boiling point than that of the organoaluminum compound, or reacting an organoaluminum compound and water, and then adding a solvent system containing the solvent having a higher boiling point than that of the organoaluminum compound to the reaction mixture; and thereafter condensing the resulting reaction mixture under atmospheric pressure or reduced pressure.Type: GrantFiled: January 9, 1991Date of Patent: January 28, 1992Assignee: Idemitsu Kosan Company LimitedInventors: Hiroshi Maezawa, Norio Tomotsu
-
Patent number: 5084196Abstract: There is disclosed a lubricating oil composition for a Flon atomsphere which comprises 100 parts by weight of a base oil having a kinematic viscosity at 40.degree. C. of 5 to 500 cSt and 0.0001 to 1 part by weight of a polysiloxane having an epoxy structure and a kinematic viscosity at 25.degree. C. of 1000 cSt or higher.This lubricating oil composition has excellent high temperature stability and anti-foaming properties in the presence of various coolants such as Flon, etc., and can be effectively utilized as a refrigerator oil, a heat pump oil, etc.Type: GrantFiled: September 8, 1989Date of Patent: January 28, 1992Assignee: Idemitsu Kosan Company LimitedInventor: Hiromichi Seiki
-
Patent number: 5082539Abstract: Novel ferrocene derivatives represented by the general formula: ##STR1## or the general formula: ##STR2## or the general formula: ##STR3## (wherein all the symbols are as described in the specification) are excellent as surfactants.By application of an electrochemical method using the novel ferrocene derivatives or other ferrocene derivatives as a micelle forming agent (surfactant), an organic thin film of a hydrophobic organic substance can be efficiently produced.Type: GrantFiled: January 24, 1990Date of Patent: January 21, 1992Assignee: Idemitsu Kosan Company LimitedInventors: Tetsuo Saji, Katsuyoshi Hoshino
-
Patent number: 5072067Abstract: Disclosed are a lubricating oil composition for plastic working and a lubricating oil composition for cutting and grinding which comprises a straight chain olefin having 6 to 40 carbon atoms. This lubricating oil composition for plastic working or a lubricating oil composition for cutting and grinding provides excellent workability and can give the material worked an excellent finish.Type: GrantFiled: November 2, 1989Date of Patent: December 10, 1991Assignee: Idemitsu Kosan Company LimitedInventors: Saburo Koyama, Seiichi Shido, Kenji Onodera, Shigeo Hara
-
Patent number: 5071953Abstract: An amorphous and excellently moldable styrene-based polymer having a syndiotactic structure can be obtained when a styrene-based polymer having a substantially syndiotactic structure is dissolved in a solvent followed by separation and recovery of the polymer from the solution or melt thereof is quenched. Shaping the same gives various kinds of shaped articles having excellent mechanical strengths and heat resistance. Physical properties of the shaped articles can be further improved by a modification treatment.Type: GrantFiled: May 11, 1989Date of Patent: December 10, 1991Assignee: Idemitsu Kosan Company LimitedInventors: Akikazu Nakano, Masahiko Kuramoto, Masakazu Suzuki, Michihiro Sawada
-
Patent number: 5070468Abstract: The present invention relates to a plant fault diagnosing system for diagnosing the operating conditions of the plant, for example, change in the physical quantity or whether any fault is present in each of the instrumentations or not. This system makes reference and makes directly comparison the process data of the plant or a diagnosing pattern processed by treating the process data in a predetermined process with a predetermined information for detecting showing the symptom of an abnormality or a predetermined reference value. When any deviation from a predetermined allowable range or coincidence of the patterns is detected, it determines that there is any abnormality in the plant, and issues an alarm to, for example, an operator.Type: GrantFiled: October 12, 1990Date of Patent: December 3, 1991Assignees: Mitsubishi Jukogyo Kabushiki Kaisha, Idemitsu Kosan Company LimitedInventors: Toshihiko Niinomi, Ryohei Funakoshi, Shigeru Kaseda, Koichi Takahashi
-
Patent number: 5064517Abstract: A finely divided metal-containing compound can be efficiently prepared by irradiating a mixed vapor phase of an organometallic compound in a concentration to exceed a specified lower limit and a reactant gaseous compound with laser beams having an incident energy density to exceed a specified lower limit. When the reactant gaseous compound in the vapor phase is an oxygen-containing compound, e.g., air, the resultant powdery product is an oxide of the metallic element of the organometallic compound. When the reactant gaseous compound in the vapor phase is a halogen-containing compound, e.g., methyl halides, the resultant powdery product is a halide of the metallic element of the organometallic compound.Type: GrantFiled: January 11, 1990Date of Patent: November 12, 1991Assignee: Idemitsu Kosan Company LimitedInventor: Nobuo Shimo
-
Patent number: 5041548Abstract: Triethylene diamines are prepared in a high yield with an amine compound having a specific group as the starting material by bringing the same into contact with a catalyst formed of a crystalline metal silicate of which the molar ratio (SiO.sub.2 /M.sub.2 O.sub.3) of silicon dioxide (SiO.sub.2) to the oxide of a tervalent metal (M.sub.2 O.sub.3, M being the tervalent metal) is at least 12. Particularly high efficiency can be obtained by using a crystalline metal silicate crystallized in the presence of an organic crystallizing agent.Type: GrantFiled: June 17, 1987Date of Patent: August 20, 1991Assignee: Idemitsu Kosan Company LimitedInventors: Haruhito Sato, Masanori Tsuzuki
-
Patent number: 5037590Abstract: A method is proposed for the preparation of pitch-based carbon fibers having excellent mechanical properties or , in particular, a surprisingly high knot strength much higher than that of PAN-based carbon fibers. The method comprises the steps of melt-spinning of starting pitch material, infusibilization of the pitch fibers by oxidation and carbonization of the infusibilized pitch fibers in an inert atmosphere. The improvement of the inventive method consists in the infusibilization treatment of pitch fibers under controlled conditions so as to effect preferential oxidation of the surface layer to such an extent that the value m=(O.sub.1s /C.sub.1s)/(O/C) is at least 2, in which O.sub.1S /C.sub.1S is the molar ratio of the oxygen content to the carbon content in the surface layer as determined by the ESCA method and O/C is the molar ratio or the oxygen content to the carbon content for the infusibilized pitch fiber as a whole.Type: GrantFiled: May 31, 1990Date of Patent: August 6, 1991Assignee: Idemitsu Kosan Company LimitedInventor: Ryutaro Fukushima
-
Patent number: 5035739Abstract: The present invention relates to a trifluoromethanesulfonamide derivative represented by the general formula given below, a herbicide with the derivative as the active ingredient and a method for the preparation of the derivative. ##STR1## [In the formula, X is a hydrogen atom, a halogen atom, an alkyl group having 1 to 4 carbon atoms or a haloalkyl group having 1 to 4 carbon atoms, n is 1, 2 or 3 and A is --O--CR.sup.3 R.sup.4 --, --S--CR.sup.3 R.sup.4 --, --SO--CR.sup.3 R.sup.4 --, --SO.sub.2 --CR.sup.3 R.sup.4 -- or --SO.sub.2 --NR.sup.3 --. And, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.]These compounds are prepared depending on A in the above given general formula by the reaction of an amine derivative and a trifluoromethanesulfonyl halide or trifluoromethanesulfonic anhydride or by the oxidation of a thiochroman ring-containing trifluoromethanesulfonamide derivative.Type: GrantFiled: January 26, 1990Date of Patent: July 30, 1991Assignee: Idemitsu Kosan Company LimitedInventors: Mitsuru Shibata, Yoshiyuki Hiramatsu, Ryoichi Adachi, Kenichiro Mitsutake
-
Patent number: 5026617Abstract: A separator for an alkaline cell comprising a substrate of a separator and 0.1% to 10% by weight of amorphous ultra fine particles of titanium dioxide and/or hydrated titanium dioxide having a primary particle diameter of a maximum of 500 .ANG. and a specific surface area of a minimum of 100 m.sup.2 /gram. An alkaline cell is also provided which incorporates the separator. The separator results in improved capability to retain electrolytic solution, improved resistivity against alkali and a low amount of residual gas generated during charge. Furthermore, the separator minimizes the electrical resistance, improves the resistivity against oxidation and prevents dendrite occurrence.Type: GrantFiled: January 31, 1990Date of Patent: June 25, 1991Assignee: Idemitsu Kosan Company LimitedInventors: Takemi Kosaka, Fukashi Sakamoto, Setsuo Hidaka
-
Patent number: 5023222Abstract: A catalyst for producing styrene-based polymers having mainly syndiotactic configuration which comprises (A) a titanium compound and (B) a contact product of a methyl group-containing organoaluminum compound and water, wherein the contact product (B) has a high magnetic field component of not more than 50% in the methyl proton signal region due to an aluminum-methyl group (Al-CH.sub.3) bond as determined by the proton nuclear magnetic resonance absorption method.Type: GrantFiled: October 1, 1990Date of Patent: June 11, 1991Assignee: Idemitsu Kosan Company LimitedInventors: Hiroshi Maezawa, Norio Tomotsu, Masahiko Kuramoto