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Mitsubishi Gas Chemical Company, Inc. Patents
Assignee:
Mitsubishi Gas Chemical Company, Inc.
Address:
Tokyo, JP
No. of patents:
1113
Patents:


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Patent Number Title Of Patent Date Issued
5756842 Process for preparing lactamide May 26, 1998
There is herein disclosed a process for preparing a lactamide by hydrating lactonitrile in the presence of a catalyst mainly comprising a manganese oxide, and a nitrogen-containing compound such as ammonia or diethylamine. According to this process, the lactamide can be obtained from lac
5756816 Process for the production of phenol derivatives May 26, 1998
A process for the production of a phenol derivative of the formula (2), which comprises subjecting a diester compound of the formula (1) in which a hydroxyl group is protected by an acyl group, to a reaction for removal of protection, wherein the reaction is carried out in the presence o
5750739 Process for producing glycidyl ester of acrylic acid or methacrylic acid May 12, 1998
There is disclosed a process for producing a glycidyl ester of acrylic acid or methacrylic acid which comprises the steps of neutralizing acrylic acid or methacrylic acid with a carbonate or a bicarbonate of an alkali metal in an excess amount of epichlorohydrin while an oxygen-containin
5747632 Polycarbonate resin with high flowability and process for producing the same May 5, 1998
Disclosed are a polycarbonate resin with high flowability having a viscosity average molecular weight (Mv) of 13,000 to 20,000 and containing below 1% by weight of low molecular weight carbonate compounds having the range of molecular weight 1,000 or below and at least 10% by weight of a
5744115 Preparation process of hydrazine hydrate April 28, 1998
A preparation process of hydrazine hydrate is herein disclosed which comprises the step of hydrolyzing a ketazine in a distillation column to obtain hydrazine hydrate, a nonionic surface active agent having a polyoxyethylene group in its molecule and/or silicon dioxide being present
5741928 Process for producing bis (aminomethyl) cyclohexane April 21, 1998
Disclosed is a process for producing bis(aminomethyl)cyclohexane, which comprises hydrogenating a xylylenediamine in the presence of a catalyst and at least one solvent selected from the group consisting alkylamines and alkylenediamines.
5739379 Process for producing methyl methacrylate April 14, 1998
A process for producing methyl methacrylate through gas-phase catalytic reaction of methyl .alpha.-hydroxyisobutyrate as the starting raw material which process comprises feeding methanol in an amount by weight of 0.1 to 3.0 times the amount of the methyl .alpha.-hydroxyisobutyrate in a
5733521 Process for producing a purified aqueous hydrogen peroxide solution March 31, 1998
A process for producing a purified aqueous hydrogen peroxide solution comprising bringing an aqueous hydrogen peroxide solution containing impurities into contact with an anion exchange resin in the fluoride form is disclosed.According to the process, impurities in the aqueous hydrogen p
5731466 Method for preparing alkylbenzoic acid March 24, 1998
A method for preparing an alkylbenzoic acid is herein disclosed which comprises subjecting an alkylbenzene having at least two alkyl groups of 1 to 3 carbon atoms to a liquid phase oxidative reaction with a molecular oxygen-containing gas in the presence of a soluble heavy metal catalyst
5728864 Liquid crystal compound having ferrielectric phase and liquid crystal composition March 17, 1998
A liquid crystal compound of the formula (1) ##STR1## wherein R is a linear alkyl group having 6 to 12 carbon atoms,both X and Y are hydrogen atoms or one of X and Y is a fluorine atom and the other is a hydrogen atom,A is --CF.sub.3 or --C.sub.2 F.sub.5,m is an integer of 2 to 4,n is an
5725795 Oxygen absorber and method for producing same March 10, 1998
By using diatomaceous earth as the moisture donor for solving the problems of the oxygen absorbers employing the conventional moisture containing materials, there are provided a practically excellent oxygen absorber capable of forming a compact oxygen absorber package with high cost
5723069 Anti-ferroelectric liquid crystal compound and anti-ferroelectric liquid crystal composition March 3, 1998
An anti-ferroelectric liquid crystal compound of the following general formula (1), and an anti-ferroelectric liquid crystal composition containing it, ##STR1## wherein R is a linear alkyl group, A is --O-- or --COO--, m is an integer of 5 or greater, n is an integer of 1 to 3, e
5719242 Process for preparing methyl methacrylate polymer February 17, 1998
A process is provided for preparing a high-quality methyl methacrylate polymer by polymerizing a monomer comprising methyl methacrylate as a main component in the presence of a radical polymerization initiator, a chain transfer agent, and 5 to less than 10 wt. % methanol. The polymerizat
5716916 Polyol ester based-lubricant February 10, 1998
A polyol ester-based lubricant comprising a polyol ester (A) and a polyol ester (B);the polyol ester (A) comprising an ester of a neopentyl polyol and an acid residue of carbon number of 6-17, in which alpha-carbon in the acid residue of the polyol ester is tertiarily branched, and when
5716544 Phenyl ester compound and liquid crystal composition containing the same February 10, 1998
A phenyl ester compound of the following general formula (1), ##STR1## wherein m is an integer of 3 to 8, n is an integer of 3 to 11, both of X.sup.1 and X.sup.2 are hydrogen atoms, or one of X.sup.1 and X.sup.2 is a fluorine atom and the other is a hydrogen atom, and A is a hydrogen
5714627 Method for preparing aromatic carbonate February 3, 1998
A process for producing an aromatic carbonate which comprises: reacting a dialkyl carbonate represented by general formula (1) with an aromatic carboxylic acid aryl ester represented by general formula (2) in the presence of a catalyst to produce an aromatic carbonate represented by one
5714544 Process for the production of phenolic resin and epoxy resin composition February 3, 1998
An aromatic hydrocarbon formaldehyde resin novolak, useful as a raw phenolic compound for producing a curing agent and an epoxy resin, an epoxy resin composition which contains a novolak type epoxy resin derived from the above novolak resin and an epoxy resin and is therefore excellent
5708133 Process for purifying polymer January 13, 1998
A process for purifying a polymer by separating and removing volatile components from a polymer composition containing the volatile components, which comprises: (a) heating the polymer composition containing a methanol solvent to a temperature of 120.degree. to 240.degree. C. by a heater
5705682 Process for producing highly pure terephthalic acid January 6, 1998
A process for producing highly pure terephthalic acid comprising: (a) oxidizing a p-phenylene compound in the liquid phase in the presence of acetic acid, to produce a liquid-phase oxidation product, (b) separating the liquid-phase oxidation product into the following: (i) a first mother
5705459 Process for the production of polyol ester and ester-containing lubricating oil January 6, 1998
A process for the production of a high-performance hybrid polyol ester having excellent compatibility with hydrofluorocarbons which are regarded as the most likely refrigerant and having excellent resistance to hydrolysis which esters are liable to undergo, the polyol ester having a
5705107 Molding method for producing molded article having a hollow portion January 6, 1998
A method for the production of a molded article having a hollow portion by utilizing a gas compression apparatus having a gas source, a compressor composed of a piston and a cylinder, and a discharge valve for controlling the flow of pressurized gas discharged from the cylinder, the meth
5705089 Cleaning fluid for semiconductor substrate January 6, 1998
An acidic or basic hydrogen peroxide cleaning fluid for cleaning a semiconductor substrate, comprising a phosphonic acid chelating agent and a wetting agent, or comprising a wetting agent alone.
5703272 Process for preparing a carboxylic acid ester December 30, 1997
A process for preparing a carboxylic acid ester which includes subjecting a carboxylic acid and an alcohol or a phenol to an esterification reaction in the presence of a silica-titania catalyst. The silica-titania catalyst is prepared by adding an acidic solution containing a silicon com
5696187 Methyl methacrylate-styrene copolymer resin composition sheet December 9, 1997
A methyl methacrylate-styrene copolymer resin composition in the form of an optical sheet which comprises: (A) 100 parts by weight of a methyl methacrylate-styrene copolymer resin having a weight ratio of methyl methacrylate units to styrene units of 75:25 to 50:50, (B) 0.5 to 5 parts
5693599 Flux washing agent December 2, 1997
A flux washing agent which comprises an aqueous solution containing a quaternary ammonium salt and hydrazine is disclosed. The flux washing agent is used in the production of printed circuit boards and the like. The flux washing agent has a washing ability, and a property to suppress
5693399 Vacuum heat insulator December 2, 1997
A vacuum heat insulator comprising an oxygen absorbent which does not require water to absorb oxygen, a dehydrating agent and an acidic gas absorbent. In a preferred embodiment, the oxygen absorbent comprises (i) at least one of an unsaturated fatty acid compound and a chain hydrocarbon
5691266 Method of making a titanosilicate catalyst November 25, 1997
A titanosilicate catalyst and method for preparing the same, comprising primary titanosilicate particles which are combined with one another, wherein the titanosilicate catalyst comprises pores having a pore diameter of from 50 to 300 .ANG.. The inventive catalyst exhibits activity in a
5686172 Metal-foil-clad composite ceramic board and process for the production thereof November 11, 1997
A metal-foil-clad composite ceramic board produced by impregnating by impregnating a sintered substrate (II) of an inorganic continuously porous sintered body (I) having a true porosity of 12 to 50% and an open porosity of at least 10%, with a thermosetting resin (R) under vacuum, to for
5683952 Titanosilicate catalyst particle November 4, 1997
A titanosilicate catalyst and method for preparing the same, comprising primary titanosilicate particles which are combined with one another, wherein the titanosilicate catalyst comprises pores having a pore diameter of from 50 to 300 .ANG.. The inventive catalyst exhibits activity in a
5683506 Method of manufacturing a bismuth-substituted rare earth iron garnet single crystal film for sho November 4, 1997
A method of manufacturing a bismuth-substituted rare-earth iron garnet single crystal film used for short wavelengths, includes the steps of: manufacturing a BIG-grown substrate in an LPE furnace by the LPE method, the BIG-grown substrate having a bismuth-substituted rare-earth iron
5679847 Process for producing terephthalic acid October 21, 1997
There is disclosed a process for producing terephthalic acid which comprises oxidizing in a liquid-phase a starting raw material comprising p-xylene incorporated with 3 to 35% by weight of p-tolualdehyde based on the same at a temperature in the range of 120.degree. to 240.degree. C. by
5679480 Lithium secondary battery employing a non-aqueous media October 21, 1997
A lithium secondary battery employing a non-aqueous media in which the carbonaceous anode material is prepared by the calcination of an organic compound obtained by reacting a precursor organic compound with a lithium salt.
5676896 Process for the production of molded article with sealed pattern October 14, 1997
A process for the production of a molded article having a surface including a sealed pattern by an injection compression molding method, which comprisesplacing a substrate (thickness: X (mm)) having a pattern on the front surface thereof in a cavity of a mold with the reverse surface of
5670612 Polyamine/epoxy-containing polyoxyethylene/hydrophobic epoxy adduct curing agent September 23, 1997
An aqueous self-emulsifiable epoxy resin curing agent which is produced by reacting, with each other, an (A) polyamine (meta-xylylenediamine, etc), a (B) epoxy group-containing alkoxypolyethylene polyether compound (methoxypolyethyleneglycol glycidyl ether, etc.) having 500 to 5000 a
5670231 Clutch facing September 23, 1997
An asbestos-free high performance clutch facing which exhibits a less decrease in the friction coefficient as well as a less wearing during long-term repeated cycles of loading at high temperatures is disclosed.The clutch facing is a disk-shaped clutch facing produced by molding a compos
5667996 Process for production of bacterial cells containing poly-3-hydroxy butyric acid September 16, 1997
Disclosed is a process for accumulating a poly-3-hydroxy butyric acid in bacterial cells by continuously fermenting a methanol-assimilating bacterium having a capability of producing a poly-3-hydroxy butyric acid, in a single fermentation vessel by using methanol as carbon source at a
5663382 Process for preparing 3-methyltetrahydrofuran September 2, 1997
A process for preparing 3-methyltetrahydrofuran is herein disclosed which comprises reacting a methacrylic acid ester with carbon monoxide and a lower aliphatic alcohol to obtain a methylsuccinic acid diester, and hydrogenating and dehydrating/cyclizing this methylsuccinic acid diester.
5660762 Two-rings-containing phenyl ester compound and anti-ferroelectric liquid crystal composition con August 26, 1997
A two-rings-containing phenyl ester compound of the following general formula (1), ##STR1## wherein R.sup.1 is a linear alkyl group having 5 to 12 carbon atoms, R.sup.2 is a linear alkyl group having 1 to 15 carbon atoms, X.sup.1 and X.sup.2 are both hydrogen atoms or one of X.su
5659097 Process for producing a monoalkenyl aromatic hydrocarbon compound August 19, 1997
A process for producing a monoalkenyl aromatic hydrocarbon which comprises alkenylating a side chain of an aromatic hydrocarbon compound having at least one hydrogen atom at the .alpha.-position of a side chain (such as o-xylene) with a conjugated diene having 4 or 5 carbon atoms in the
5656234 Mold apparatus and injection molding method for producing hollow-structured article by injection August 12, 1997
An injection-molding method using an injection molding machine having a mold apparatus comprising(A) a fixed mold member,(B) a movable mold member movable in the mold opening and closing directions,(C) an intermediate mold member which is provided between the fixed mold member and the mo
5654380 Aliphatic polyester carbonate and process for producing the same August 5, 1997
Provided are an aliphatic polyester carbonate having biodegradability and having a content of carbonate unit of at least 5 mol %, a weight-average molecular weight of at least 100,000, a melt viscosity of 2,000-50,000 poises at 190.degree. C. and under a load of 60 kg and a melting point
5644018 Pitch with reduced tendency to smoke during spinning and a process for the production of said pi July 1, 1997
Mesophase pitch that has a softening point of no more than 250.degree. C., a pyridine-insolubles content of no more than 50% and a n-heptane solubles content of 3-10%, with the n-heptane solubles experiencing a weight loss of no more than 15% at 450.degree. C. as measured by thermogravim
5639417 Mold apparatus for process for injection molding June 17, 1997
A process for the production of a molded article having a hollow structure, using an injection molding machine equipped with a mold apparatus having a mold provided with a cavity, said process comprising the steps of(a) positioning a plug in its forward end position in the cavity with a
5626815 Gas-feeding nozzle and apparatus and method employing such nozzle May 6, 1997
A gas-feeding nozzle is to be used with a mold attached to an injection molding machine and for introducing a pressurized gas into molten resin injected in a cavity of the mold to produce an injection molded article having a hollow structure. A top forward portion of the gas-feeding nozz
5608121 Process for producing polyhydric alcohol March 4, 1997
There is disclosed a process for producing a polyhydric alcohol which comprises reacting an aliphatic aldehyde with formaldehyde in the presence of a base compound consisting essentially of a hydrogencarbonate and a carbonate which have been formed by the oxidation or hydrolysis of a
5599981 Process for producing alkylbenzoyl chloride February 4, 1997
Provided is a process for producing alkylbenzoyl chloride which comprises reacting alkylbenzaldehyde with chlorine at a temperature of -10.degree. to 80.degree. C. under a pressure of 5 kg/cm.sup.2 or below in a liquid phase, whereby alkylbenzoyl chloride can be produced in a high yield
5599888 Process for preparing methyl methacrylate polymer February 4, 1997
A process is provided for preparing a high-quality methyl methacrylate polymer by polymerizing a monomer comprising methyl methacrylate as a main component in the presence of a radical polymerization initiator, a chain transfer agent, and a small amount of methanol as a solvent. The
5596040 Polyphenylene ether resin composition containing modified aromatic hydrocarbon-formaldehyde resi January 21, 1997
A thermoplastic resin composition comprising:(a) about 20 to 80% by weight of polyphenylene ether resin comprising at least one structural unit in its backbone represented by the formula: ##STR1## wherein (b) about 0.01 to 10% by weight of a modified aromatic hydrocarbon-formaldehyde
5587508 Process for producing 2,6-naphthalenedicarboxylic acid and ester thereof December 24, 1996
A process for producing 2,6-naphthalenedicarboxylic acid (NDCA) is disclosed. This process comprises oxidizing a 2,6-dialkylnaphthalene with a gas containing molecular oxygen in a solvent containing a lower aliphatic carboxylic acid in the presence of a catalyst comprising heavy meta
5587453 Process for purifying methacrylate December 24, 1996
A process for purifying a methacrylate which comprises contacting the methacrylate with an oximating agent, such as hydroxylamine hydrochloride or an aqueous alkali solution, such as an aqueous sodium hydroxide solution, or both, and then separating and collecting the resultant purif
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