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Mitsui Petrochemical Industries, Ltd. Patents
Mitsui Petrochemical Industries, Ltd.
Tokyo, JP
No. of patents:

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Patent Number Title Of Patent Date Issued
RE34914 Lubricant oil for refrigerators April 25, 1995
A lubricant oil for refrigerators, industrial gears, automotive engines, automotive gear oil, fibers and as a rolling lubricant oil, comprising a glycol ether carbonate represented by the general formula [I] ##STR1## wherein R.sub.1 and R.sub.2 are each independently an aliphatic gro
RE30006 Process for the formation of a polyolefin coating layer onto a metal surface May 22, 1979
A process for forming a polyolefin coating layer onto a surface of a metal which comprises coating an uncured epoxy resin layer onto the surface of a metal and melt-bonding a polyolefin modified with an unsaturated carboxylic acid or an anhydride thereof onto the uncured epoxy resin laye
6521713 Vulcanizable EPDM containing rubber composition February 18, 2003
A rubber composition is disclosed containing an ethylene-propylene-nonconjugated diene copolymer rubber (or a blend of an ethylene-propylene-nonconjugated diene copolymer rubber and a diene rubber), a specific alkoxysilane compound, and amorphous silica powder having a specific surfa
6485804 Polyester compositions and laminates and processes for producing biaxially stretched polyester b November 26, 2002
The novel polyester (first polyester [A]) of the invention comprises dicarboxylic acid constituent units derived from at least one dicarboxylic acid selected from terephthalic acid, isophthalic acid and naphthalenedicarboxylic acid and diol constituent units derived from diols compri
6177036 Process for formed article production by extrusion January 23, 2001
A plastic foam article 1 produced by extrusion, for example, a plastic foam sheet comprising homopolymers and copolymers of polycyclic olefins, contains at least 10% by volume of open cells 2, 4 which have a polyhedron-like shape and adjoin one another. The deformation-free opening o
6165573 Multi-layer laminates and uses thereof December 26, 2000
The present invention provides a multi-layer laminate consisting essentially of:(A) a layer formed from an ethylene/cycloolefin random copolymer which is a copolymer of ethylene and a cycloolefin represented by a specific formula (e.g., tetracyclododecene), or a layer formed from a cyclo
6130312 Production of aromatic polyamide October 10, 2000
A process for producing an aromatic polyamide which comprises:(a) a dicarboxylic acid component which consists of 30-100 mol % of terephthalic acid and optionally 0-70 mol % of at least one dicarboxylic acid other than terephthalic acid, and(b) a diamine component which consists of 50-100 mo
6080828 Polymerization catalyst and process for preparing an ethylene polymer June 27, 2000
An ethylene polymer having small values of Mw/Mn and Mz/Mw, a small proportion of long-chain branches, a high melt tension and a high swell ratio, and a process for preparing the ethylene polymer are disclosed. A solid titanium catalyst component obtained by initially bringing a solid
6063536 Thermal fixing developer material and wax for electrophotography May 16, 2000
A thermal fixing developer material for electrophotography is provided. This developer material is adapted for use as a main component of an electrostatic toner, and the toner produced by using this developer material exhibits excellent release properties upon thermal fixing, and in
6054542 Ethylene polymer and process for preparing the same April 25, 2000
An ethylene polymer having small values of Mw/Mn and Mz/Mw, a small proportion of long-chain branches, a high melt tension and a high swell ratio and a process for preparing the same by polymerizing ethylene in the presence of an ethylene polymerization catalyst comprising a solid ti
6034189 Solid titanium catalyst component for olefin polymerization, process for preparation of the same March 7, 2000
Disclosed is a solid titanium catalyst component for olefin polymerization comprising magnesium, titanium, halogen, and (C) a phthalic diester represented by the following structural formula (i): ##STR1## wherein R is a branched hydrocarbon group of 7 carbon atoms, and two or R m
5977277 Acrylic ester, novel allyl ether, novel allyl carbonate, acrylic ester polymer, allyl ether poly November 2, 1999
The novel acrylic ester, allyl ether and allyl carbonate of the present invention are characterized by having the structures represented by the following general formulae (I) to (IV): The above acrylic ester, allyl ether and allyl carbonate are used as a starting monomer which forms a
5972446 Polyester bottle and method of removing adsorbates on the bottle October 26, 1999
The refillable polyester bottle of the invention has a mean crystallinity of 32 to 70% at the bottle body, a methanol adsorption of 1,500 ppm or less at the same portion and a paraxylene adsorption of 300 ppm or less at the same portion. Therefore, the bottle is excellent in non-adsorpti
5955209 Thin-film electroluminescent device September 21, 1999
The thin-film electroluminescent device of the present invention comprises a thin film of a polyoxadiazole derivative represented by the formula: ##STR1## wherein each of X.sub.0 and Y.sub.0 independently represents a divalent organic group which may comprise a silicon atom, and n is
5922888 Process for removal of diol as impurity in cyclic carbonic acid ester July 13, 1999
A process for removing a diol from a cyclic carbonic acid ester containing the diol as an impurity, which comprises bringing a cyclic carbonic acid ester containing a diol as an impurity into contact with a synthetic zeolite in the presence of a chain carbonic acid ester. According to th
5880056 Olefin polymerization catalyst and process for olefin polymerization March 9, 1999
Disclosed is an olefin polymerization catalyst comprising (A) a transition metal compound represented by the formula (I) R.sup.1 R.sup.2 MX.sub.2 (wherein M is a transition metal atom, R.sup.1 and R.sup.2 are each a cycloalkadienyl group having an aryl group and a saturated hydrocarbon
5869586 Process for preparing a cycloolefin copolymer February 9, 1999
The present invention relates to a process for preparing a cycloolefin copolymer by polymerization of at least one cyclic olefin and at least one acyclic olefin in the presence of a catalyst comprising at least one metallocene compound of the formula I, ##STR1## where L is a .pi.
5869563 Ethylene/.alpha.-olefin/nonconjugated polyene copolymer rubber composition February 9, 1999
The ethylene/.alpha.-olefin/nonconjugated polyene copolymer rubber composition of the present invention comprises in specified proportions a crystalline polyolefin resin (A) and an ethylene/.alpha.-olefin/nonconjugated polyene copolymer rubber (B) composed of ethylene, an .alpha.-ole
5863986 Polymer alloy blend or composition and shaped articial obtained therefrom January 26, 1999
Polymer alloy comprising a) one or more cycloolefin copolymers and b) one or more types of core-shell particles and c) one or more block copolymers.
5859272 Transition metal compound, olefin polymerization catalyst component comprising the transition me January 12, 1999
Disclosed is a novel transition metal compound represented by the following formula: ##STR1## wherein M is a transition metal, X is halogen or the like, R.sup.1 is a hydrocarbon group or the like, R.sup.2 is an aryl group substituted with a halogenated hydrocarbon group, and Y is
5859158 Olefin polymerization catalyst and process for olefin polymerization January 12, 1999
Disclosed in an olefin polymerization catalyst comprising a transition metal compound having at least two transition metals in which at least one of said metals is bonded to a ligand having a cyclopentadienyl skeleton, at least one of said metals is selected from Sc, Y, Ti, Zr, Hf, V, Nb
5856399 Thermoplastic elastomer composition January 5, 1999
The thermoplastic elastomer composition of the invention comprises a crystalline polyolefin resin (A), an olefin rubber (B), a hydrogenated styrene block copolymer (C), a softener (D), and optionally, a peroxide non-crosslinked type hydrocarbon rubber (E) in a specific amount of each,
5854354 Process for preparing propylene polymer composition and propylene polymer composition December 29, 1998
A process for preparing a propylene polymer composition comprising conducting multistage polymerization including a step (a) for preparing a propylene (co)polymer (a) and a step (b) for preparing an ethylene copolymer (b) in the presence of (A) a transition metal compound and (B) a c
5854349 Cycloolefin copolymer composition December 29, 1998
Disclosed is a cycloolefin copolymer composition (C) obtained by copolymerizing an .alpha.-olefin of two or more carbon atoms (a) and a specific cycloolefin (b) in the presence of an aromatic ring-containing vinyl hydrocarbon/conjugated diene copolymer or a product of hydrogenation t
5849826 Semiaromatic polyamides, processes for preparing the same and compositions containing the same December 15, 1998
The semiaromatic polyamide of the invention comprises 40 to 90% by mol of (A) recurring units derived from terephthalic acid and an aliphatic diamine of 4 to 12 carbon atoms, 0 to 50% by mol of (B) recurring units derived from isophthalic acid and an aliphatic diamine of 4 to 12 carbon
5847227 Method for producing aryl alkyl hydroperoxides December 8, 1998
A method for producing aryl alkyl hydroperoxides which comprises selectively oxidizing an aryl alkyl hydrocarbon having the formula: ##STR1## wherein P and Q are hydrogen or an alkyl and may be the same or different from each other; x is an integer of 1-3; and Ar is an aromatic hydro
5844046 Process for the preparation of olefin polymer December 1, 1998
A process for preparing an olefin polymer comprising the steps of: preparing an olefin polymer [I] by polymerizing or copolymerizing an olefin in the presence of an olefin poymerization catalyst comprising a specific solid titanium catalyst component [A], a specific organoaluminum co
5842505 Multi-layer pipe December 1, 1998
A multi-layer pipe has an innermost layer formed of a butene polymer composition. At least one other layer is formed of a polyolefin resin composition comprising (A) 95-5 parts by weight of a polyolefin resin, (B) 5-95 parts by weight of a filler, and (C) 0.1-10 parts by weight per 100
5840815 Gas-phase or slurry polymerization process for the preparation of an olefin polymer November 24, 1998
The present invention provides an ethylene copolymer comprising constituent units (a) derived from ethylene and constituent units (b) derived from an .alpha.-olefin having 3 to 20 carbon atoms, the ethylene copolymer being characterized in that(A) the ethylene copolymer has a density (d)
5840808 Process for preparing olefin polymer November 24, 1998
The present invention provides processes for preparing olefin polymers, by which olefin polymers composed of a propylene block copolymer component and an ethylene/.alpha.-olefin copolymer component are directly prepared by polymerization and olefin polymers excellent in impact resistance
5840645 Olefin polymerization catalyst and method for the polymerization of olefin using said olefin pol November 24, 1998
In accordance with the present invention, there are provided an olefin polymerization catalyst comprising an organoaluminum oxy-compound (A), a transition metal compound (B) and a hydrogenated organoaluminum compound (C); a solid olefin polymerization catalyst comprising the above-mentio
5840235 Biaxially oriented film of high molecular weight polyethylene, process for preparing the same, s November 24, 1998
Biaxially oriented films from high molecular weight polyethylene are characterized by a gas permeable structure formed from random-arranged microfibrils. The films have coefficients of static friction and kinetic friction of not more than 1.0. The biaxially oriented films are further
5837791 Unsaturated copolymer of ethylene and process for preparing the same November 17, 1998
A novel unsaturated copolymer of ethylene comprises a random copolymer of (i) ethylene, (ii) an .alpha.-olefin of 3 to 20 carbon atoms and (iii) at least one straight chain or branched chain nonconjugated triene or tetraene having one vinyl group in the molecule, which contains 30-92% by
5830981 Process for producing polyethylene terephthalate November 3, 1998
A process for producing a polyethylene terephthalate in which the amount of the oligomers, such as cyclic trimer etc., is lower and which causes metal mold staining to occur difficultly. The process comprises an esterification stage in which dicarboxylicacids including mainly terepht
5830954 Method and apparatus for controlling polyolefine resin production plant November 3, 1998
The names of a plurality of polyolefine resins are previously registered as index data in a name data base. An optimal operational pattern is stored in an operational pattern table for each combination of the name of a current resin under production and the name of a target resin to be
5815060 Inductance element September 29, 1998
To realize compactness of an inductance element such as choke coil or the like, an inductance element is provided which is composed of a magnetic core having a central hollow portion defined by a magnetic alloy thin strip, and a lead line disposed to pass through the hollow portion of th
5811513 Process for producing polyethylene naphthalate September 22, 1998
In the production of polyethylene naphthalate of the present invention, the esterification reaction between naphthalenedicarboxylic acid and ethylene glycol is conducted while causing water to be present in a reaction system from a start of reaction, in the presence of at least one catal
5811047 Polyolefin packaging material for drug packaging, method of production thereof and containers fo September 22, 1998
The invention provides a polyolefin drug packaging material characterized in that the content, in the polyolefin, of substances containing 12 to 26 carbon atoms is not more than 150 ppm. The packaging material of the invention is useful because the risk of its reacting with and adversely
5809048 Wavelength stabilized light source September 15, 1998
A short wavelength light source mainly comprises a semiconductor laser for pumping a laser medium, a birefringence filter for controlling or stabilizing the waveform by applying an optical feedback to the semiconductor laser to feed back only light of specific wavelength, lens system
5807948 Vulcanizable rubber composition containing ehtylene-.alpha.-olefin-nonconjugated polyene random September 15, 1998
Disclosed is a process for preparing an ethylene-.alpha.-olefin-nonconjugated polyene random copolymer comprising random copolymerizing (a) ethylene, (b) an .alpha.-olefin of 3 or more carbon atoms and (c) a nonconjugated polyene in the presence of a metallocene catalyst containing a
5807801 Catalyst for the polymerization of alpha-olefins September 15, 1998
Presence of a catalyst formed from (A) a transition metal compound comprising (A-1) a transition metal atom, (A-2) a hetero atom-containing ligand containing a heteroatom selected from oxygen, sulfur, nitrogen and phosphorus capable of forming a bond with the transition metal atom, and
5804678 Process for gas phase polymerization of olefin September 8, 1998
In a gas phase olefin polymerization, an olefin is continuously fed to a fluid bed reactor in which a metallocene catalyst is present. At least one compound selected from water, alcohols and ketones is added in a specified amount simultaneously with the feeding of the olefin. Thus, an ol
5804517 Flexible nonwoven fabric and laminate thereof September 8, 1998
A flexible nonwoven fabric comprising conjugate long fibers of sheath-core type comprising a core of a resin having a high melting point and a polyethylene sheath is provided. The fiber has a weight ratio of the resin of the high melting point to the polyethylene of from 5/95 to 20/80 an
5799412 Drying solid polymer apparatus September 1, 1998
Drying of a solid polymer is disclosed in which a solid polymer obtained by polymerization (or a product of modification of the solid polymer) is contacted with a drying gas so that any solvent and/or unreacted polymerization feed materials remaining in the solid polymer are removed
5795838 Olefin polymerization catalyst and process for olefin polymerization August 18, 1998
A solid olefin polymerization catalyst comprising: a fine particle carrier; (A) a transition metal compound of a Group IVB metal of the periodic table, containing a ligand having a cyclopentadienyl skeleton; (B) an organoaluminum oxy-compound; and optionally (C) an organoaluminum com
5789484 4-Methyl-1-pentene polymer compositions August 4, 1998
A 4-methyl-1-pentene polymer composition is prepared by melt mixing (A) a 4-methyl-1-pentene polymer, (B) a 1-butene polymer, (C) a propylene polymer, and (D) a triblock copolymer of polystyrene/ethylene-butylene copolymer/polystyrene and/or a triblock copolymer of polystyrene/ethyle
5789459 Resin composition for hard coating and coated product August 4, 1998
A surface-coated vessel or a surface-coated product having a hard coating layer is obtained, by coating a substrate of, for example, resin product with a resin composition for hard coating which comprises(a) a poly[(meth)acryloyloxyalkyl] (iso)cyanurate represented by the following gener
5786403 Foamable olefin thermoplastic elastomer compositions and foamed products thereof July 28, 1998
Disclosed is a foamable olefin thermoplastic elastomer composition comprising (A) a partially crosslinked thermoplastic elastomer composition, (B) long-chain branch-containing polypropylene and (C) a foaming agent. The partially crosslinked thermoplastic elastomer composition (A) is
5783273 PTP or blister packaging articles and packaging material therefor July 21, 1998
A press-through packaging or blister package having excellent moisture-proofness, transparency, and superior processibility by vacuum or pneumatic forming, comprising of a formed product having blisters thereon prepared by forming a sheet or film of a non-stretched layer made from one
5780378 Solid titanium catalyst component for olefin polymerization, process for preparing the same, cat July 14, 1998
A solid titanium catalyst component comprising (a) magnesium, (b) titanium, (c) a halogen, (d) a polyether, (e) a hydrocarbon and (f) an electron donor other than the polyether (d) as essential components is provided. Also a process for preparing a solid titanium catalyst component for
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