Patents Assigned to Idemitsu Petrochemical Co.
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Patent number: 6723446Abstract: The present invention provides a wrap film or shrink film formed from a resin composition containing [I] a propylene polymer in an amount of 1 to 99 mass %, and [II] an olefin-based polymer in an amount of 99 to 1 mass %, wherein [I] the propylene polymer satisfies the following requirements of: (1) a meso pentad fraction (mmmm) is 0.2 to 0.6, and (2) a racemic pentad fraction (rrrr) and (1−mmmm) satisfy the following relation: [rrrr/(1−mmmm)]≦0.1. The wrap film or shrink film exhibits excellent characteristics, and does not generate a toxic gas derived from chlorine, such as hydrogen chloride gas or dioxin, when being incinerated.Type: GrantFiled: November 5, 2002Date of Patent: April 20, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasushi Seta, Masahiko Endoh
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Patent number: 6720370Abstract: A thermoplastic resin composition having 100 parts by weight of a resin mixture of (A) from 20 to 98% by weight of a polycarbonate resin and (B) from 2 to 80% by weight of a styrenic resin; from 0.1 to 20 parts by weight of (C) an epoxy-modified block copolymer; and from 0.5 to 20 parts by weight of (D) a grafted core/shell rubber elastomer, can be used in moldings which have a good surface layer peeling resistance and a good impact resistance. Further, a flame-retardant polycarbonate resin composition having 100 parts by weight of a resin or resin mixture of (A) from 20 to 100% by weight of a polycarbonate resin and (B) from 0 to 80% by weight of a styrenic resin; from 1 to 30 parts by weight of (E) a flame retardant of an organic phosphorus compound; and from 0.Type: GrantFiled: February 1, 2002Date of Patent: April 13, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Akio Nodera, Naoki Mitsuta
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Patent number: 6720377Abstract: A color pigment master batch having a high recycling property and a process for producing a blow-molded article having a grain-tone appearance using this color pigment master batch. The color pigment master batch for blow molding includes a pigment and a carrier resin. The carrier resin is a thermoplastic elastomer which is a crystalline or amorphous thermoplastic elastomer having a Vicat softening point higher than a melting temperature of a molding base resin and a crystal melting point or a flow-starting temperature higher by 20° C. or more than a melting temperature of the molding base resin and in which an MFR ratio thereof to the molding base resin is 5 or more.Type: GrantFiled: March 28, 2002Date of Patent: April 13, 2004Assignees: Idemitsu Petrochemical Co., Ltd., Tokyo Printing Ink Mfg. Co., Ltd.Inventors: Masami Takimoto, Toshihisa Miyaoka, Takeshi Watanabe
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Patent number: 6720048Abstract: The pipe of the present invention comprises an ethylene base polymer comprising ethylene and an &agr;-olefin having 3 to 20 carbon atoms, wherein (A) a maximum value of the residual stress is 0.13 MPa or less; (B) the crystallinity is 0.630 to 0.850; (C) a gradient of the crystallinity against a thickness of the pipe is 0.465 or less; and (D) the pipe has a thickness of 5 to 50 mm. It is excellent in a durability, a rigidity and an impact resistance and suited to uses for large diameter pipes receiving a high internal pressure.Type: GrantFiled: February 22, 2002Date of Patent: April 13, 2004Assignees: Idemitsu Petrochemical Co., Ltd., Kurimoto, Ltd.Inventors: Katsutoshi Ohta, Shigeru Murakami, Ryouichi Nakano
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Patent number: 6716510Abstract: The present invention relates to a polycarbonate resin that has a viscosity average molecular weight of from 10,000 to 17,000 and has characteristic features in an iron content, a free total phenol content, a content of a releasing agent, a fraction of hydroxyl end groups, a 1H-NMR spectrum or the like. The polycarbonate resin has less defects due to flash without increase of an addition amount of a releasing agent to an unnecessary level and therefore is suitable for a material of an optical disk substrate.Type: GrantFiled: December 27, 2001Date of Patent: April 6, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Tatsuya Tomioka, Hiroshi Kawato, Munehiro Chosa
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Patent number: 6710142Abstract: There is provided a method for extracting a gaseous fluid which comprises extracting the gaseous fluid through fluid extraction ports set up on the top face portion of a vertical-type agitation tank equipped inside with an agitator, wherein two fluid extraction ports are set up at positions approximately symmetrical about the center of the top face portion of the vertical-type agitation tank, or wherein at least three fluid extraction ports are set up each at a vertex of an approximately regular polygon having the central point identical with the center of the top face portion of the vertical-type agitation tank.Type: GrantFiled: December 16, 2002Date of Patent: March 23, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasunobu Kaneko, Takamichi Matsumura, Tomoo Nambu, Itaru Matsuhiro
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Patent number: 6706786Abstract: Disclosed is a resin composition containing the following components (A), and (B) or optionally, (C), (D), and (E): (A) an atactic polystyrene or a mixture of an atactic polystyrene and a rubber-like elastic substance: 30 to 95 parts by weight; (B) a syndiotactic polystyrene having a melting point of not higher than 255° C.: 70 to 5 parts by weight; (C) a polyphenylene ether having an intrinsic viscosity of 0.5 deciliter/g or less as measured in chloroform at 25° C.; (D) an inorganic filler; and (E) a polymer having compatibility or affinity with components (A) and (B) and having a polar group. The styrene resin composition exhibits improved solvent resistance and remarkable impact resistance. The composition of the invention is produced by kneading the components within a resin temperature range between the melting point of component (B) and 270° C.Type: GrantFiled: September 16, 2002Date of Patent: March 16, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Akihiko Okada, Takuma Aoyama
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Patent number: 6699830Abstract: The invention relates to a crosslinked, carboxylic acid-based copolymer having good water absorbability and biodegradability, and a method for producing it; to an unsaturated carboxylic acid polymer having good detergency and its use; and to a biodegradable builder, a detergent composition and a dispersant. The invention includes (1) a crosslinked product of a copolymer from a monomer component that comprises an unsaturated monocarboxylic acid monomer and a specific amount of a quinone; and (2) an unsaturated carboxylic acid polymer which gives specific peaks in proton nuclear magnetic resonance spectrometry, and which has a specific number-average molecular weight and has calcium ion-sequestering ability, or an unsaturated carboxylic acid polymer having a specific structure.Type: GrantFiled: December 20, 2000Date of Patent: March 2, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Shigeru Matsuo, Yoshikatsu Seino
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Publication number: 20040036315Abstract: A window 30 is a two-color molding comprising a transparent section 32 and a frame section 31 integrated with the transparent section 32, the frame section 31 and the transparent section 32 are formed with a first material and a second material respectively, and the first material is a thermoplastic resin with the linear thermal expansion coefficient in the MD direction lower by 1×10−5 to 3×10−5 (mm/(mm.K)) than that of the second material, and also with the MD/TD ratio for the linear thermal expansion coefficient in the range from 0.6 to 1.Type: ApplicationFiled: April 30, 2003Publication date: February 26, 2004Applicants: IDEMITSU PETROCHEMICAL CO., LTD., ASAHI GLASS COMPANY, LIMITEDInventors: Nobuhiro Watanabe, Tomomi Hasegawa, Akio Ishiguchi
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Patent number: 6696527Abstract: Provided is a novel olefin copolymer comprising [A] a cyclic olefin, [B] an aromatic vinyl compound and [C] an aliphatic &agr;-olefin having from 2 to 20 carbon atoms. (1) the component [A] therein accounts for from 0.1 to 30 mol %, the component [B] for from 0.1 to 49.9 mol %, and the total of the components [A] and [B] for from 0.2 to 50 mol %; and (2) the copolymer has a glass transition temperature Tg of lower than 60° C. Having a suitable modulus of elasticity, the copolymer can be a substitute for soft polyvinyl chloride as a soft resin, and it has good elastic recovery and transparency.Type: GrantFiled: June 20, 2001Date of Patent: February 24, 2004Assignee: Idemitsu Petrochemical Co. Ltd.Inventors: Kiyohiko Yokota, Noriyuki Tani, Nobuhide Ishihara, Junichi Matsumoto
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Patent number: 6696525Abstract: In the present invention, the polymer composition is produced by polymerizing an anionically or cationically polymerizable monomer in the presence of a highly syndiotactic styrenic polymer and optionally a rubber-like polymer. The polymer composition thus obtained is improved in its solvent resistance without using any particular compatibilizer and has a good moldability.Type: GrantFiled: August 1, 2002Date of Patent: February 24, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Norio Tomotsu
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Patent number: 6689849Abstract: The present invention provides a catalyst for bulk or vapor-phase polymerization having high polymerization activity during bulk or vapor-phase polymerization and providing an olefin polymer having excellent properties in melt flow rate and stereoregularity by adding a small amount of hydrogen. The catalyst for bulk or vapor-phase polymerization of an &agr;-olefin compound under a presence of hydrogen, the catalyst is made by contacting the following ingredients (A) to (C). (A) a solid catalyst ingredient, comprising: (a) a magnesium compound, (b) titanium tetrachloride, and (c) dialkyl phthalate (Each of the alkyl group denotes a straight-chain or branched-chain hydrocarbon group having a carbon number of 3 to 20.); (B) an organoaluminum compound; and (C) an organosilicon compound, which is expressed by the following general chemical formula (1).Type: GrantFiled: December 19, 2001Date of Patent: February 10, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Takanori Sadashima, Masami Kanamaru, Tsuyoshi Ota, Hideo Funabashi
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Patent number: 6686508Abstract: Provided is a production process for high quality bisphenol A which is reduced in a sulfonic acid-containing heavy matter contained in the product and which is improved in a hue. In an after-treating step for a reaction mixed solution obtained by condensing excess phenol with acetone in the presence of an acid catalyst, a filtering step by a filter is provided at least in one step between a step for dissolving an adduct of bisphenol A and phenol by using a phenol-containing solution and a step for crystallizing and separating the above adduct from this solution.Type: GrantFiled: October 31, 2002Date of Patent: February 3, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Kazuyuki Hirano, Ken Fujimoto
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Patent number: 6667359Abstract: There are disclosed a polypropylene composition for automotive parts which has a melt index at 230° C. and at 2.16 kgf of at least 30 g/10 minutes and which comprises 55 to 60% by weight of (1) propylene/ethylene block copolymer; 20 to 25% by weight of (2) rubber comprising a styrene/ethylene/propylene/styrene block copolymer and/or a styrene/ethylene/1-butene/styrene block copolymer and an olefinic elastomer; and 18 to 23% by weight of (3) talc, and also an automotive part which comprises the above polypropylene composition.Type: GrantFiled: June 23, 2000Date of Patent: December 23, 2003Assignees: Idemitsu Petrochemical Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Masaru Nakagawa, Koki Hirano, Yutaka Obata, Yasuhisa Sugita, Takao Nomura, Masatoshi Matsuda, Hisayuki Iwai, Takayuki Nagai
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Patent number: 6653513Abstract: Provided is a process for producing bisphenol A having a stable color tone at a high temperature and free from coloration, which comprises reacting phenol with acetone in the presence of an acid ion-exchange resin as a catalyst and an alkyl mercaptan as a cocatalyst, wherein a concentration of an organosulfur compound in a crystallization starting material obtained by conducting the reaction under conditions that a reaction temperature is between 60 and 100° C., a phenol to acetone molar ratio is between 6 and 13 and an acetone to alkyl mercaptan molar ratio is between 13 and 25, distilling off unreacted acetone, by-product water and the alkyl mercaptan as the cocatalyst and further distilling off excess phenol is measured, and maintained at 200 weight ppm or less.Type: GrantFiled: June 22, 2000Date of Patent: November 25, 2003Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Masahiro Iwahara
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Patent number: 6649725Abstract: Disclosed are a binary random copolymer of propylene and ethylene, and a film to be formed by sheeting the copolymer. The film has good heat-sealability, high stiffness, good anti-blocking and slipping properties, and high transparency. As having excellent heat-sealability at low-temperature, the copolymer and its film are favorably used as sealant layers of laminate films.Type: GrantFiled: October 14, 1997Date of Patent: November 18, 2003Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasushi Seta, Satoshi Nakatsuka, Michihiro Sawada, Ryoichi Tsunori, Tokutaro Kimura, Yutaka Minami
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Publication number: 20030212299Abstract: There is disclosed a method of producing bisphenol A, in which bisphenol A is produced by condensation of phenol and acetone with the use of a cation exchange resin as a catalyst and a free mercaptan as a promoter, comprising feeding phenol and acetone to a multi-stage reactor in which at least two fixed bed-type adiabatic reactors packed with the cation exchange resin are arranged in series and a heat exchanger is provided at an inlet of each of the reactors, and controlling the temperature within each of the reactors so as not to exceed 90° C.Type: ApplicationFiled: June 11, 2003Publication date: November 13, 2003Applicant: IDEMITSU PETROCHEMICAL CO., LTD.Inventor: Tetsuya Saruwatari
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Patent number: 6646105Abstract: There is disclosed a process for treating a by-product salt from a polyarylene sulfide which comprises treating a solid mixture containing an aprotic organic solvent and the by-product salt that is formed in the case of producing the polyarylene sulfide by subjecting an alkali metal sulfide and a dihalogenated aromatic compound to polymerization condensation reaction in the aprotic organic solvent, characterized in that the aprotic organic solvent is recovered by dry treating the solid mixture by the use of a dryer having a self-cleaning property. It is enabled by the above process to efficiently recover the aprotic organic solvent, and thereby produce the objective polyarylene sulfide at a lower cost.Type: GrantFiled: March 26, 2002Date of Patent: November 11, 2003Assignees: Petroleum Energy Center, Idemitsu Petrochemical Co., Ltd.Inventor: Daigo Shirota
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Patent number: 6639038Abstract: A first crystalline polypropylene of the present invention satisfies the relationships of the following formulae (1) and (2): &agr;≦−0.42×ln(Mp)+7.3 (1),and Tm>1.85×ln(Mp)+144.5 (2), wherein &agr; is a 0° C. soluble content (% by weight) as measured through programmed-temperature fractionation, Mp is a peak molecular weight in a molecular weight distribution curve as measured through gel permeation chromatography, and Tm is a melting point (° C.) as measured through differential scanning calorimetry. A second crystalline polypropylene of the present invention satisfies the relationship given in the following formula (3): &agr;≦1.11[&eegr;]−0.42+1.40 (3) wherein &agr; is the same as above and [&eegr;] an intrinsic viscosity (dl/g) as measured in a tetralin solvent at 135° C.Type: GrantFiled: September 27, 2001Date of Patent: October 28, 2003Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Itaru Kuramoto, Yutaka Obata, Tsuyoshi Ota, Toshio Isozaki, Junichi Amano, Takashi Sumitomo
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Patent number: RE38495Abstract: Provided is a method for manufacturing a thermoplastic resin sheet bearing an embossed pattern, which employs a manufacturing apparatus having a first roll having an elastic material coated surface, a mirror-faced metal, endless belt, which is wound around the first roll and a second roll, and a third roll so provided that the metal, endless belt is wrapped partially around the third roll, which contacts the first roll via the metal, endless belt and which has an embossed pattern formed on one surface. According to this method, the thermoplastic resin sheet, partially melted, is fed between the metal, endless belt, which contacts the first roll, and the third roll. The elastic member is elastically deformed by application of a pressing force between the first and the third roll, while face pressure welding the thermoplastic sheet by using the first and the third rolls to transfer the embossed pattern and to cool the thermoplastic resin sheet. A surface temperature for the third roll of from 0° C.Type: GrantFiled: August 27, 2001Date of Patent: April 13, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Atsushi Fujii, Akira Funaki, Ryuji Moriwaki