Patents Assigned to Idemitsu Petrochemical Co.
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Publication number: 20040147713Abstract: 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: ApplicationFiled: January 14, 2004Publication date: July 29, 2004Applicant: IDEMITSU PETROCHEMICAL CO., LTD.Inventors: Tatsuya Tomioka, Hiroshi Kawato, Munehiro Chosa
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Publication number: 20040142139Abstract: 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: ApplicationFiled: January 14, 2004Publication date: July 22, 2004Applicant: IDEMITSU PETROCHEMICAL CO., LTD.Inventors: Tatsuya Tomioka, Hiroshi Kawato, Munehiro Chosa
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Publication number: 20040143048Abstract: 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: ApplicationFiled: January 14, 2004Publication date: July 22, 2004Applicant: IDEMITSU PETROCHEMICAL CO., LTD.Inventors: Tatsuya Tomioka, Hiroshi Kawato, Munehiro Chosa
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Patent number: 6759003Abstract: Blow-molding molds 10 and 20 having parison shutters 31 and 32 for preventing an inflation of the parison 3 toward the outside of the molds 10 and 20 are used in a blow-molding method of the present invention. In other words, a closed space for preventing the parison 3 from inflating out of the molds 10 and 20 are formed by the parison shutters 31 and 32 and a predetermined air is secured in the parison 3 in a frame clamping step (B). In the subsequent mold clamping step (C), the pressure inside the parison 3 starts to be increased when the molds 10 and 20 press the parison 3, so that the parison 3 can be continuously in contact with the die design surface 11. Accordingly, since the parison 3 can be uniformly contracted by cooling, molding failure such as streaks and uneven pattern transfer can be avoided, thus obtaining a blow-molded product having good appearance.Type: GrantFiled: February 21, 2001Date of Patent: July 6, 2004Assignees: Idemitsu Petrochemical Co., Ltd., Toyota Shatai Kabushiki KaisyaInventors: Tomoyuki Obara, Katsuhiko Tada, Sueki Sugawara, Shoichi Miura, Hirofumi Yamada, Shigekazu Kumazaki
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Patent number: 6756002Abstract: A producing apparatus is used, in which a metallic endless belt having a mirror face is wound on and extends between a first cooling roller covered with an elastic member and a second cooling roller, and a third cooling roller having a mirror face on its surface and touching the first cooling roller through a molten thermoplastic resin sheet and the endless belt oriented therebetween to hold the molten thermoplastic resin sheet pressed with the endless belt. While the temperature of the third cooling roller and the endless belt directly touching the molten thermoplastic resin sheet is retained at less than 50° C.Type: GrantFiled: September 12, 2001Date of Patent: June 29, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Atsushi Fujii, Akira Funaki, Tohru Yukumoto, Katsumi Uchiyama
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Patent number: 6750319Abstract: There are disclosed a process for producing a polyarylene sulfide through polymerization condensation of a sulfur source and a dihalogenated aromatic compound by using a polymerization vessel equipped with baffles that are asymmetrically arranged in the polymerization vessel or in the form of round bar, or by using a polymerization vessel equipped with an agitational blade which is devoid of a notch in the vicinity of the tip portion of the blade, and is in such a configuration as substantially equalizing the spacing between the tip portion thereof and the opposite bottom portion and/or end portion of the polymerization vessel all over the tip portion thereof; and an apparatus used for the process. The process and apparatus enables to form a uniform dispersion state of polymer phase in the vessel and to produce polyarylene sulfide having a high molecular weight.Type: GrantFiled: April 8, 2002Date of Patent: June 15, 2004Assignees: Idemitsu Petrochemical Co., Ltd., Petroleum Energy Center, a Juridical Incorporated FoundationInventor: Yoshinari Koyama
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Patent number: 6746643Abstract: The invention relates to a method for producing blow moldings, especially to a blow-molding method capable of efficiently producing blow moldings of crystalline thermoplastic resin having good surface gloss and good mold transferability of, for example, embossed patterns and, not warped, having a good appearance with no sinkmarks. The method comprises blowing and shaping a parison of a crystalline thermoplastic resin at a mold temperature falling between (the crystallization point of the resin −10° C.) and (the melting point of the resin), then keeping the thus-blown parison at a temperature falling between (the crystallization point of the resin −15° C.) and (the crystallization point thereof −45° C.) for a dwell time of from 30 to 300 seconds, and thereafter cooling it in an ordinary manner.Type: GrantFiled: May 15, 2001Date of Patent: June 8, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Tadahiro Kannari
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Patent number: 6743890Abstract: Provided is a method of purifying a polyarylene sulfide by washing it with a mixture of an aprotic organic solvent and an alkyl halide, or with a mixture prepared by adding a halogenoaromatic compound having an electron-withdrawing group to an aprotic organic solvent. The method makes it possible to reduce the impurities such as alkali metal halides in polyarylene sulfide, thus giving thermally stable polyarylene sulfide.Type: GrantFiled: July 17, 2002Date of Patent: June 1, 2004Assignees: Idemitsu Petrochemical Co., Ltd., Petroleum Energy Center(PEC)Inventor: Toru Bando
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Patent number: 6740784Abstract: There is disclosed a process for producing bisphenol A by subjecting phenol and acetone to condensation reaction in the presence of a catalyst composed of an acid type ion exchange resin which is modified in part with a sulfur-containing amine compound, wherein the ion exchange resin having a modification rate of 10 to less than 20 mol % is used for a methanol concentration in acetone of lower than 250 ppm by weight, and the ion exchange resin having a modification rate of 20 to 65 mol % is used for a methanol concentration in acetone of 250 to 8000 ppm by weight. The above process is capable of producing bisphenol A at high conversion and selectivity by suppressing deterioration of catalytic activity due to methanol as an impurity in acetone.Type: GrantFiled: October 29, 2002Date of Patent: May 25, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Masahiro Iwahara, Tetsuya Saruwatari
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Publication number: 20040097700Abstract: A facility of collecting a component of high melting point in a gas, excellent in treating efficiency and having a relatively simple structure is provided.Type: ApplicationFiled: August 8, 2003Publication date: May 20, 2004Applicants: Tsukishima Kikai Co., Ltd., Idemitsu Petrochemical Co., Ltd.Inventors: Kenji Oouchi, Kiwamu Ishii, Jyunji Wakayama, Tomio Ohno
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Patent number: 6737171Abstract: Provided are a propylenic random copolymer of propylene and ethylene satisfying the following (1) to (5), a composition comprising the copolymer, a film and a stretched film of the copolymer or its composition, and a laminate film and a stretched laminate film comprising at least one layer of the copolymer or its composition. (1) The ethylene unit content (x, wt. %) of the copolymer is from 0.2 to 10 wt. %. (2) The copolymer has a melt index (MI, g/10 min) of from 0.1 to 4 g/10 min. (3) The relation between the boiling diethyl ether extraction (E, wt. %) of the copolymer and x satisfies the following (I) or (II); E≦0.253x+1.1 (0.2≦x<6) (I) E≦2.6 (6≦x≦10) (II) (4) The relation between the melting point (Tm, ° C.Type: GrantFiled: November 22, 2002Date of Patent: May 18, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yasushi Seta, Satoshi Nakatsuka, Michihiro Sawada, Ryoichi Tsunori
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Patent number: 6737379Abstract: Provided are an aluminium-oxy compound obtained through reaction of an organoaluminium compound with water, which is soluble in hydrocarbon solvents and in which the amount of the organoaluminium compound remaining is at most 10% by weight; a carrier comprising the aluminium-oxy compound and an inorganic compound; and a catalyst component for olefin polymerization comprising the carrier and a transition metal compound. The catalyst component for olefin polymer production comprises the aluminium-oxy compound and gives polyolefins with good polymer morphology.Type: GrantFiled: August 10, 2000Date of Patent: May 18, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Mitsugu Kanzawa, Shuji Machida
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Patent number: 6737551Abstract: In the production of bisphenol A by condensation of phenol and acetone with the use of a cation exchange resin as a catalyst and optionally a free mercaptan as a promoter, the degree of conversion of phenol is maintained by increasing the molar ration of acetone/phenol with the deterioration of the cation exchange resin; with this method, bisphenol A can be effectively produced with industrial advantage.Type: GrantFiled: August 20, 2002Date of Patent: May 18, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Tetsuya Saruwatari
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Patent number: 6733705Abstract: The invention provides a blow molding and a method for producing it. The blow molding is lightweight; its strength and rigidity per the unit weight thereof are high; and its heat resistance, sound absorption, heat insulation and sound insulation are all good. The blow molding is produced inexpensively, and is useful for the parts of inlet systems for internal-combustion engines, etc. The blow-molding method is for fiber-containing thermoplastic resins, and comprises holding a parison made of an inorganic fiber-containing, melt-expandable thermoplastic resin, between a pair of facing splits of a mold, blowing the parison to shape it, and thereafter optionally reducing the gaseous pressure inside it to thereby expand the wall of the shaped article. The blow molding is made of a thermoplastic resin, and it contains from 15 to 70% by weight of inorganic fibers having a mean fiber length of from 1 to 20 mm, and has a porosity of from 10 to 90%.Type: GrantFiled: February 28, 2001Date of Patent: May 11, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Tomoyuki Obara
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Patent number: 6734270Abstract: A polypropylene-based calendered or injection-molded article satisfying the requirements of (1) having a tensile modulus TM of 5 MPa or higher and (2) having, when measured by a differential scanning calorimeter (DSC), no melting point or a melting point Tm (° C.) satisfying the formula: TM≧5×Tm−450, is less tacky and excellent in flexibility and transparency. Such a polypropylene-based calendered or injection-molded article is produced from a propylene polymer satisfying the requirements of (1) having a component soluble in a 25° C. hexane in a content H25 of 0 to 80% by weight; (2) having, when measured by a differential scanning calorimeter (DSC), no melting point or a melting point Tm (° C.) satisfying the formula: &Dgr;H≧6×(Tm−140) wherein &Dgr;H is a melting endotherm (J/g); and (3) having an intrinsic viscosity [&eegr;] of 1 to 3 dl/g as measured at 135° C. in tetralin.Type: GrantFiled: April 5, 2002Date of Patent: May 11, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Yutaka Minami, Masami Kanamaru, Koji Kakigami, Atsuhiko Ubara
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Patent number: 6730626Abstract: Useful as a catalyst component for polymerizing olefin is the transition metal compound of the present invention represented by Formula (I): wherein M represents a transition metal compound of the fourth group in the periodic table; X represents a &sgr; bonding ligand; Y represents a Lewis base; T represents a group containing a &sgr; bonding atom; E is a specific group containing an atom which can coordinate with M via a lone pair; q is 1 or 2 and represents [(valency of M)−2]; r represents an integer of 0 to 3; R1 to R4 represent a hydrogen atom, a halogen atom, a hydrocarbon group, a halogen-containing hydrocarbon group, a silicon-containing group or a hetero atom-containing group.Type: GrantFiled: May 31, 2002Date of Patent: May 4, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Takashi Kashiwamura, Takuji Okamoto
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Patent number: 6727312Abstract: For making a polycarbonate resin resistant to flames with any of non-halogen and non-phosphorus compounds, provided is a polycarbonate resin composition having good flame retardancy and having good impact resistance, high stiffness and good chemical resistance. The flame-retardant polycarbonate resin composition comprises a resin mixture of (A) from 1 to 99% by weight of a polycarbonate and (B) from 1 to 99% by weight of a thermoplastic polyester, and contains, relative to 100 parts by weight of the resin mixture, (C) from 0.01 to 3 parts by weight of a polyfluoro-olefin resin, and (D) from 1 to 400 parts by weight of a polycarbonate-polyorganosiloxane copolymer and/or (E) from 0.1 to 10 parts by weight of a functional silicone compound.Type: GrantFiled: February 1, 2002Date of Patent: April 27, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Akio Nodera
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Patent number: 6727993Abstract: Apparatus for inspecting a surface of an object to be measured. The light source applies light to the surface. An objective lens opposite the surface receives reflected light. A light detector detects a component of the light incident on the lens from a direction parallel to its optical axis and obtains its light quantity. A slit is provided in the optical path between the objective lens and the detector in order to narrow the light detection extent in the surface to be measured. The surface condition of the object can be measured with a good accuracy independently of the shape of the object.Type: GrantFiled: February 22, 1999Date of Patent: April 27, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Ryuzou Tomomatsu
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Patent number: 6727394Abstract: There is disclosed a process for producing bisphenol A by continuously supplying phenol to a first-stage reactor in a continuous multi-stage fixed-bed reaction system composed of at least two reactors each filled in with a cation exchange resin as a catalyst, and continuously supplying acetone separately to each of the reactors, characterized by arranging a reactor which is filled in with a fresh or regenerated cation exchange resin on the final stage in the case of replacing the most seriously deteriorated cation exchange resin in catalytic activity with the fresh or regenerated cation exchange resin, and operating the final stage reactor so that the ratio R of the feed rate of acetone to the consumption rate thereof falls within more than one to less than 3. The above process makes it possible to efficiently produce bisphenol A having favorable hue, while maintaining the acetone feed rate at a relatively low level.Type: GrantFiled: October 30, 2002Date of Patent: April 27, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Tetsuya Saruwatari
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Patent number: 6723403Abstract: A multi-layer structure having two or more layers which comprises a surface layer (a) comprising a thermoplastic resin and having a thickness of 10 to 80 &mgr;m and an adjacent layer (b) comprising a thermoplastic resin or a thermoplastic resin containing an inorganic filler, an interlaminar peeling strength between the surface layer (a) and the adjacent layer (b) being in the range of 0.3 to 2.0 kg/15 mm; and a container comprising this multi-layer structure, wherein the container is excellent in sealing properties, heat resistance and opening properties.Type: GrantFiled: January 28, 2002Date of Patent: April 20, 2004Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Ikuya Ishii, Hiroshi Odaka