Patents by Inventor Hiromi Shigemoto
Hiromi Shigemoto 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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Patent number: 6777491Abstract: A multilayered article and vessel, which are superior in the properties, such as shock resistance, rigidity, an ability to barrier against gasoline and interlayer adhesion, and are permissible of being recycled for reuse, comprising a base layer (A1) comprising a polyetylene resin (a1) having an MFR (ASTM D 1238, 190° C., 2160 g) of 0.001 to 0.5 g/10 min. and a density of 0.945 to 0.980 g/cm3, an adhesive layer (A2) comprising a modified etylene/&agr;-olefin copolymer (a2) which is modified by having grafted thereon an unsaturated carboxylic acid or its derivative and has a density of 0.900 to 0.940 and a barriering layer (B) comprising an ethylene/vinyl alcohol copolymer (b), wherein the Izod impact strength (with notch) (ASTM D 256, −40° C.Type: GrantFiled: August 11, 2000Date of Patent: August 17, 2004Assignee: Mitsui Chemicals, Inc.Inventors: Hideshi Kawachi, Hiromi Shigemoto, Yuichiro Terashi
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Publication number: 20030008163Abstract: The 4-methyl-1-pentene copolymer multi-layer film according to the present invention is a three-layer laminate or a five-layer laminate, which comprises a layer (A) comprising 4-methyl-1-pentene, a layer (B) comprising polypropylene or polyethylene, and optionally, a layer (C) comprising an adhesive resin, said layer (A) being provided on each surface of the layer (B) in the three-layer laminate or being provided on each surface of the layer (B) through the layer (C) in the five-layer laminate, and this multi-layer film is uniaxially stretched in a stretch ratio of not less than 2 times or biaxially oriented in a stretch ratio of not less than 1.5 times in each of the machine direction and the transverse direction.Type: ApplicationFiled: May 20, 2002Publication date: January 9, 2003Inventors: Takashi Nakahara, Shinichi Imuta, Hiromi Shigemoto
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Patent number: 6214426Abstract: A multilayered article and vessel, which are superior in the properties, such as shock resistance, rigidity, an ability to barrier against gasoline and interlayer adhesion, and are permissible of being recycled for reuse, comprising a base layer (A1) comprising a polyetylene resin (a1) having an MFR (ASTM D 1238, 190° C., 2160 g) of 0.001 to 0.5 g/10 min. and a density of 0.945 to 0.980 g/cm3, an adhesive layer (A2) comprising a modified etylene/&agr;-olefin copolymer (a2) which is modified by having grafted thereon an unsaturated carboxylic acid or its derivative and has a density of 0.900 to 0.940 and a barriering layer (B) comprising an ethylene/vinyl alcohol copolymer (b), wherein the Izod impact strength (with notch) (ASTM D 256, −40° C.Type: GrantFiled: April 23, 1998Date of Patent: April 10, 2001Assignee: Mitsui Chemicals, Inc.Inventors: Hideshi Kawachi, Hiromi Shigemoto, Yuichiro Terashi
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Patent number: 6015625Abstract: An adhesive resin composition contains at least a partially or wholly graft-modified .alpha.-olefin/aromatic vinyl compound random copolymer having a graft quantity of an unsaturated carboxylic acid or its derivative ranging from 0.01 to 30% by weight. A laminate comprises (I) a polyester resin layer or a polycarbonate layer, (II) an adhesive layer formed from the above-mentioned adhesive resin composition and (III) a saponified olefin/vinyl acetate copolymer layer. The adhesive resin composition is free from lowering of adhesive strength even when contacted with, for example, hot water. The laminate has excellent gas barrier properties and is capable of being subjected to retorting treatment.Type: GrantFiled: September 24, 1998Date of Patent: January 18, 2000Assignee: Mitsui Chemicals, Inc.Inventors: Kenichi Morizono, Keiji Okada, Hiromi Shigemoto, Hideshi Kawachi
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Patent number: 5693418Abstract: Disclosed is a laminated film or sheet comprising poly-4-methyl-1-pentene laminated on a paper layer. By using poly-4-methyl-1-pentene having a low melting point, formation of cracks and other defects in the resin layer is prevented and the oil and fat impermeability is improved. If an intermediate layer of a specific polymer is formed in addition to the poly-4-methyl-1-pentene layer, the oil and fat impermeability is further improved. A box-shaped vessel (carton) and a release paper for an artificial leather can be prepared from this laminated film or sheet.Type: GrantFiled: July 20, 1995Date of Patent: December 2, 1997Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiromi Shigemoto, Katsumi Noritomi
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Patent number: 5480718Abstract: Disclosed is a laminated film or sheet comprising poly-4-methyl-1-pentene laminated on a paper layer. By using poly-4-methyl-1-pentene having a low melting point, formation of cracks and other defects in the resin layer is prevented and the oil and fat impermeability is improved. If an intermediate layer of a specific polymer is formed in addition to the poly-4-methyl-1-pentene layer, the oil and fat impermeability is further improved. A box-shaped vessel (carton) and a release paper for an artificial leather can be prepared from this laminated film or sheet.Type: GrantFiled: April 23, 1992Date of Patent: January 2, 1996Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiromi Shigemoto, Katsumi Noritomi
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Patent number: 5106692Abstract: A laminate comprising(A) a layer of a 4-methyl-1-pentene polymer,(B) a layer of a polymer composition comprising(a) 40 to 98% by weight of an ethylene/alpha-olefin random copolymer containing 30 to 95 mole % of ethylene units,(b) 0.1 to 20% by weight of a polyolefin modified with an unsaturated carboxylic acid or its derivative, and(c) 1 to 50% by weight of a tackifier, the proportions of components (a), (b) and (c) being based on the total weight of components (a), (b) and (c), and(C) a layer of a thermoplastic resin, the layers (A), (B) and (C) being laminated in the sequence stated.Type: GrantFiled: October 13, 1989Date of Patent: April 21, 1992Assignee: Mitsui Petrochemical Industries, Ltd.Inventor: Hiromi Shigemoto
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Patent number: 5100941Abstract: This invention concerns a polyolefin resin composition composed essentially of(A) a polyolefin resin,(B) an alkyl disulfide compound represented by formula [I]R.sup.1 --S--S--R.sup.2 [I]wherein R.sup.1 and R.sup.2 are the same or different and each denotes an alkyl group with 10 or more carbon atoms,(C) a triazine compound represented by formula [II] ##STR1## and/or a benzene compound represented by formula [III] ##STR2## According to this invention, there is provided the stabilized polyolefin resin composition that can resistant to heat ageing for a long period of time without discoloring.Type: GrantFiled: July 5, 1990Date of Patent: March 31, 1992Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiromi Shigemoto, Keiji Kawamoto, Tetsuji Kasai
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Patent number: 5096646Abstract: A process and device for producing a rubber tube having a smooth outside surface in which a molten synthetic resin is heated from the inner circumferential side immediately before it flows from a die along the periphery of a rubber material layer and the rubber mentioned is cooled within the die.Type: GrantFiled: February 27, 1990Date of Patent: March 17, 1992Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiromi Shigemoto, Akio Yamamoto
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Patent number: 5080979Abstract: A release film composed of a laminate comprising(A) a layer of a flexible polyolefin as an interlayer, and(B) two layers of crystalline polymethylpentene formed on both sides of the interlayer.Type: GrantFiled: December 28, 1989Date of Patent: January 14, 1992Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiromi Shigemoto, Mikio Katagiri
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Patent number: 5077123Abstract: A laminated film comprising(A) a base layer of a polymer based on 4-methyl-1-pentene;(B) provided on at least one side of the base layer, an interlayer of an .alpha.-olefin copolymer comprising 10-85 mole % of propylene, 3-60 mole % of 1-butene and 10-85 mole % of .alpha.-olefin having 5 or more carbon atoms, a degree of crystallininty of the copolymer as measured by X-ray diffractometry being 20% or less; and(C) provided on the interlayer, a heat-sealable layer of an .alpha.-olefin polymer material predominantly comprising an .alpha.-olefin having 2 to 4 carbon atoms.Type: GrantFiled: May 24, 1988Date of Patent: December 31, 1991Assignee: Mitsui Petrochemical Industries, Ltd.Inventor: Hiromi Shigemoto
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Patent number: 5025057Abstract: In accordance with the present invention, there are provided 4-methyl-1-pentene polymer compositions comprising 90-10 parts by weight of 4-methyl-1-pentene polymer (A), 90-10 parts by weight of propylene polymer (B) and 70-10 parts by weight of inorganic filler (C), provided that the sum of (A), (B) and (C) total to 100 parts by weight. There are also provided 4-methyl-1-pentene polymer compositions 20-3 parts by weight of .alpha.-olefin copolymer (D) in addition to the above-mentioned components (A), (B) and (C), provided that the sum of (A), (B), (C) and (D) totals to 100 parts by weight.These compositions as illustrated above are capable of vacuum forming, injection blow-forming and the like, and they are excellent in rigidity at high temperatures, toughness at low temperature and impact strength.Type: GrantFiled: December 13, 1988Date of Patent: June 18, 1991Assignee: Mitsui Petrochemical Industries, Ltd.Inventor: Hiromi Shigemoto
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Patent number: 4988558Abstract: A laminated film comprising(A) a layer of a polymer of 4-methyl-1-pentene,(B) an interlayer of a mixture of (a) a polymer of 4-methyl-1-pentene and (b) an alpha-olefin copolymer comprising 10 to 85 mole % of propylene units, 3 to 60 mole % of 1-butene units and 10 to 85 mole % of units of an alphaolefin having at least 5 carbon atoms, the proportions being based on the total amount of the propylene units, the 1-butene units and the other alpha-olefin units, having a crystallinity, determined by X-ray diffractometry, of not more than 20%, and(C) a layer of a polyolefin derived from an alpha-olefin having 2 to 4 carbon atoms, as a main component,the layers (A), (B) and (C) being laminated in the order stated.Type: GrantFiled: May 26, 1989Date of Patent: January 29, 1991Assignee: Mitsui Petrochemical Industries, Ltd.Inventor: Hiromi Shigemoto
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Patent number: 4983674Abstract: A hot melt adhesive composition which comprises:(a) a copolymer of vinyl aromatic compounds and conjugated dienic compounds, or a hydrogenated version thereof in amounts of about 20-70% by weight;(b) a tackifier comprising alicyclic hydrocarbon polymers in amounts of about 30-80% by weight; and(c) a 4-methylpentene-1 polymer in amounts of about 0.3-20% by weight, based on the composition, respectively.Type: GrantFiled: August 10, 1988Date of Patent: January 8, 1991Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiromi Shigemoto, Masami Takeda, Tsuneaki Muro
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Patent number: 4938910Abstract: A mandrel suitable for use in the production of a rubber hose formed from a composition comprising:(i) at least one member selected from the group consisting of(A) an ethylene-alpha-olefin random copolymer having an ethylene content of 10 to 95 mol % and a degree of crystallinity, based on X-ray determination, of 0 to 20%,(B) a propylene - C.sub.4 to C.sub.10 alpha-olefin random copolymer having a propylene content of 50 to 80 mol % and a crystal fusion heat amount, determined by a differential scanning calorimeter, of 0 to 80 Joule/g, and(C) an oligomer having the general formula: ##STR1## wherein n and p are independently zero or an integer, m is zero or 1, and R is ##STR2## and (ii) 98% to 30% by weight of a 4-methyl-1-pentene polymer, wherein the weight ratio of the component (i) to the component (ii) is from 2:98 to 70:30.This mandrel has excellent dimensional stability, durability, heat resistance, and releasability.Type: GrantFiled: May 16, 1988Date of Patent: July 3, 1990Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Shunji Abe, Hiromi Shigemoto
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Patent number: 4880589Abstract: A process for production of an essentially non-oriented surface-roughened film or sheet comprising a crystalline homopolymer or crystalline copolymer of 4-methyl-1-pentene having a surface roughness of 0.5 to 10 micrometers, said process including the following steps (1) preparing a molten composition comprising a homopolymer or copolymer of 4-methyl-1-pentene, (2) extruding the molten composition to form a film or sheet, and (3) placing the film or sheet in contact with a roller having a roughened surface or passing the film or sheet through a pair of rollers, at least one of which has a roughened surface; and the use of the above-mentioned surface roughened film or sheet for the manufacture of single-sided metal clad laminates.Type: GrantFiled: June 21, 1988Date of Patent: November 14, 1989Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiromi Shigemoto, Shunji Abe, Akio Yamamoto
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Patent number: 4837277Abstract: A resin composition comprising (A) 80 to 99.5% by weight of poly(4-methyl-1-pentene) and (B) 0.5 to 20% by weight of a thermoplastic resin having a reflective index between 1.48 and 1.80, typically polycarbonate and polyester has high resistance to food stains and a white color without a pigment and is suitable to mold into dishes.Type: GrantFiled: December 9, 1987Date of Patent: June 6, 1989Assignee: Mitsui Petrochemical Industries, Ltd.Inventor: Hiromi Shigemoto
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Patent number: 4777201Abstract: An essentially non-oriented surface roughened film or sheet comprising a homopolymer or copolymer of 4-methyl-1-pentene having the surface roughness of 0.5 to 10 micrometers; a process for production of the above-mentioned surface roughened film or sheet of claim 1 comprising the following steps (1) preparing a molten composition comprising a homopolymer or copolymer of 4-methyl-1-pentene, (2) extruding the molten composition to form a film or sheet, and (3) placing the film or sheet in contact with a roller having a roughened surface or passing the film or sheet through a pair of rollers, at least one of which has a roughened surface; and the use of the above-mentioned surface roughened film or sheet for the manufacture of single-sided metal clad laminates.Type: GrantFiled: August 1, 1986Date of Patent: October 11, 1988Assignee: Mitsui Petrochemical Industries PLCInventors: Hiromi Shigemoto, Shunji Abe, Akio Yamamoto
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Patent number: 4731400Abstract: A thermoplastic resin composition having excellent transparency and a high ultraviolet transmittance and free from a reddish color is obtained from a polymer or copolymer of 4-methyl-1-pentene and a blue pigment. Preferably, the composition further comprises a black pigment and/or a red pigment.Type: GrantFiled: December 16, 1985Date of Patent: March 15, 1988Assignee: Mitsui Petrochemical Industries, Ltd.Inventor: Hiromi Shigemoto
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Patent number: 4693677Abstract: A neck-in control device of a flat die comprising a pair of inducing guides, provided at both ends of a resin extruding outlet of the flat die, for inducing a molten resin extruded from the resin extruding outlet to move outward, whereby an inward neck-in of the molten resin is suppressed.Type: GrantFiled: April 23, 1986Date of Patent: September 15, 1987Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiromi Shigemoto, Akio Yamamoto, Iwatoshi Suzuki