Patents Assigned to Mitsubishi Petrochemical Co., Ltd.
  • Patent number: 5375468
    Abstract: This invention relates to an acceleration sensor system having a self-checking operation of an air bag safety system while a vehicle is being driven. An acceleration sensor element suitable for self-checking while a vehicle is driven is obtained by a planar piezoelectric element supported so that it can vibrate, a detecting electrode provided on an upper face of the planar piezoelectric element, and an actuator to add vibrations at a predetermined frequency to the planar piezoelectric element. A sensitivity checking circuit generates a sensitivity checking signal representing sensitivity of an acceleration sensed from a detected signal. A signal processing circuit generates an acceleration signal representing the applied acceleration to the acceleration sensor from the detected signal.
    Type: Grant
    Filed: July 16, 1992
    Date of Patent: December 27, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Fumio Ohta, Nobuo Tanaka, Akira Gohkura
  • Patent number: 5373046
    Abstract: A process for producing a resin compound applicable to precise electronic parts, especially sliding member from thermoplastic engineering plastics is disclosed, comprising compounding (I) a carbon masterbatch comprising polyethylene having a density of not less than 0.92 g/cm.sup.3 and an MI of from 0.1 to 30 g/10 min, conductive carbon black, and talc and (II) a thermoplastic engineering plastic. The carbon black is satisfactorily dispersed to impart satisfactory heat conductivity to a molded article to thereby providing a sliding member with little wear and long durability.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: December 13, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Michiya Okamura, Tetsuo Konno, Kouichi Sagisaka, Masakazu Ikeda
  • Patent number: 5371236
    Abstract: A non-crystalline ether-imide type high purity bismaleimide composition represented by formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each represent a hydrogen atom, a halogen atom, or an alkyl group having from 1 to 4 carbon atoms; R.sup.5 represents a hydrogen atom or a methyl group; and R.sup.6 represents a hydrogen atom, a methyl group or a phenyl group. The non-crystalline bismaleimide (I) has a purity of 95 wt % or higher, a melting point of not higher than 130.degree. C., and exhibits excellent solubility in a solvent.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: December 6, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kaoru Kanayama, Tadao Takeyama, Takeshi Nakato, Yoshinobu Ohnuma, Hiromi Chiba
  • Patent number: 5366859
    Abstract: A radioimmunoassay which comprises the steps of reacting a first antibody (A) on an insoluble solid, which is specific for an antigen (B); an antigen (B); and a second antibody (C) derived from an animal different from that of the first antibody (A), which binds to the antigen (B) under conditions that the concentration of the second antibody (C) is higher than the dissociation constant between the second antibody (C) and the antigen (B) to obtain an immune complex (D); reacting the immune complex (D) with a radiolabeled probe (E) and then measuring the radioactivity of the solid precipitate or the reaction mixture, to measure the quantity of antigen (B). The method provides an assay with high sensitivity which does not depend on the sensitivity of the second antibody to be used.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: November 22, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kinya Miyoshi, Masato Okada, Makoto Takada, Mayumi Goto
  • Patent number: 5360866
    Abstract: A thermoplastic resin composition comprising (A) from about 10 to about 90% by weight of a hydroxyalkylated polyphenylene ether represented by formula (I): ##STR1## wherein A represents a residue of a polyphenylene ether from which a hydroxyl group is removed; and n represents an integer of from 1 to 10, and (B) from about 10 to about 90% by weight of a resin selected from a carboxyl-containing olefin resin, an epoxy-containing olefin resin, a hydroxyl-containing olefin resin, a polyamide resin, and a saturated polyester resin, provided that when (B) is the olefin resin, the hydroxyalkylated polyphenylene ether also can be represented by formula (II): ##STR2## wherein A is defined as above; X represents an oxygen atom or a nitrogen atom; R.sup.1 represents an alkylene group having from 1 to 12 carbon atoms; R.sup.2 and R.sup.3 each represents a hydrocarbon group having from 1 to 6 carbon atoms; s represents 1 when X is an oxygen atom, or 2 when X is a nitrogen atom; and t represents an integer of from 1 to 3.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: November 1, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Yusuke Arashiro, Michiharu Kihara, Haruo Ohmura, Fumiyoshi Yamada
  • Patent number: 5352721
    Abstract: There is disclosed a thermoplastic resin composition which comprises(a) a polyphenylene ether and(b) a polyamide resin, and(c) 0.01 to 5 parts by weight of an acetal and(d) 0.01 to 5 parts by weight of a Lewis acid based on 100 parts by weight of the above (a) and (b) in total.
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: October 4, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kenjiro Takayanagi, Koji Nishida, Kiyonori Suzuki
  • Patent number: 5344969
    Abstract: A process for purifying a crude naphthalenedicarboxylic acid containing impurities and coloring substances obtained by the oxidation of a di-substituted naphthalene, dispense with the use of a large amount of alkali or acid, and producing a naphthalenedicarboxylic acid having a high purity and good color effectively and in a high recovery is disclosed, which comprises dissolving the crude naphthalenedicarboxylic acid in a mixed solvent comprising an amine compound and an alcohol and conducting crystallization.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: September 6, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Hiroshi Iwane, Takahiro Sugawara, Miwa Shirasaki
  • Patent number: 5344733
    Abstract: Disclosed is an electrophotographic receptor provided with an overcoat layer comprising a cured fluororesin and a nitrogen-containing compound selected from the group consisting of an aromatic amine antioxidant and a charge transport substance on the surface of a photosensitive layer containing a charge generating substance.
    Type: Grant
    Filed: November 4, 1992
    Date of Patent: September 6, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Shinichi Suzuki, Yasuyuki Shigematsu, Takashi Kojima, Hiroe Kizaki, akira Itsubo
  • Patent number: 5338472
    Abstract: An electrolytic solution for an electrolytic capacitor is disclosed, comprising a basic solution comprising a mixed solvent of .gamma.-butyrolactone and ethylene glycol having dissolved therein a quaternary alkylammonium salt of phthalic acid, maleic acid or benzoic acid as a solute, the basic solution further containing from 0.5 to 10 parts by weight of colloidal silica and from 0.5 to 8 parts by weight of at least one phosphorus compound selected from dialkyl phosphate and phosphorous acid, per 100 parts by weight of the basic solution. The electrolytic solution has an increased dielectric strength while retaining high conductivity.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: August 16, 1994
    Assignees: Nippon Chemi-Con Corporation, Mitsubishi Petrochemical Co., Ltd.
    Inventors: Yutaka Yokoyama, Tatsunori Tsuji, Makoto Ue, Tomohiro Sato
  • Patent number: 5336608
    Abstract: A process for producing an NADH oxidase which comprises culturing alkalophilic, facultative anaerobic NADH oxidase-producing bacteria having the optimum growth pH in an alkaline region in medium and collecting said NADH oxidase from the culture; and a plasmid used for the said process.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: August 9, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Youichi Niimura, Michio Kozaki, Hisashi Yamagata, Hideaki Yukawa
  • Patent number: 5332801
    Abstract: Disclosed are processes for preparing a process for preparing a modified polyphenylene ether which comprises reacting any one of a borane compound having at least one boronhydrogen bond, an .alpha.,.beta.-unsaturated carbonyl compound or a mercaptane having a carbonyl group, a hydroxyl group or an alkoxysilyl group with a polyphenylene ether having a carbon-carbon unsaturated bond in a substituent, and optionally oxidizing the resulting borane-modified PPE under alkaline conditions.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: July 26, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Toru Tsukahara, Mitsutoshi Aritomi
  • Patent number: 5326627
    Abstract: A polyolefin-based wrapping film having one or more layers which satisfies the following conditions (1) to (4):(1) the film has a thickness ranging from 6 to 100 .mu.m;(2) the film has a birefringence .DELTA.n.sub.A of from 0.6.times.10.sup.-3 to 8.times.10.sup.-3 ;(3) the film has a ratio of percent heat shrinkage in MD to percent heat shrinkage in TD of from 0.65 to 1.50 in a silicon oil bath at 140.degree. C. for 3 minutes; and(4) the film has a strain recovery of at least 18 mm,which provides excellent performance properties in stretch wrapping, especially in the area of high deformation recover.
    Type: Grant
    Filed: October 20, 1992
    Date of Patent: July 5, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Takao Yazaki, Masataka Noro, Takashi Matsui, Noriyuki Kobayashi, Hironari Sano, Koji Yamamoto
  • Patent number: 5326811
    Abstract: A plated polyamide resin article obtained by plating, with a suitable plating substance, a molded article of a polyamide resin composition is disclosed, the polyamide resin composition comprising (A) from 30 to 80% by weight of a polyamide resin, (B) from 20 to 70% by weight of a polyphenylene ether resin, (C) from 1 to 50 parts by weight, per 100 parts by weight of the sum of (A) and (B), of an impact modifier, and (D) from 0.01 to 30 parts by weight, per 100 parts by weight of the sum of (A) and (B), of a compatibilizer, in which the polyamide resin forms a continuous phase, and the polyphenylene ether resin forms a dispersed phase, with the polyamide resin having a crystallinity of from 20 to 55% with the crystalline region thereof being not less than 72% in the .gamma. crystal form. The plated article is excellent in heat resistance, impact resistance, and appearance.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: July 5, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Hironari Sano, Koji Nishida
  • Patent number: 5322864
    Abstract: An epoxy resin composition comprising (a) a low-viscosity epoxy resin having a viscosity of not more than 100 poise at 25.degree. C. which contains a tri- or tetrafunctional liquid aromatic epoxy resin, (b) a liquid curing agent selected from the group consisting of an imidazole compound, the combination of a liquid alicyclic acid anhydride and an imidazole compound, the combination of a liquid alicyclic amine and an imidazole compound, (c) a metal powder having an average particle size of not more than 125 .mu.m or an inorganic powder consisted of 50 parts or more by weight of a metal powder having an average particle size of not more than 125 3/4m and less than 50 parts by weight of an inorganic filler other than a metal powder, whose average particle size is smaller than that of the metal powder, based on the total amount of the metal powder and the inorganic filler.
    Type: Grant
    Filed: February 2, 1993
    Date of Patent: June 21, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Toshio Sugimoto, Sadahiko Kawaguchi, Akira Esaki
  • Patent number: 5318871
    Abstract: A toner for electrophotography obtained by melting and kneading a kneaded material prepared by melting and kneading a domain resin and a coloring agent, a matrix resin having a low compatibility with the domain resin, and a dispersion assistant having a compatibility with both of the domain resin and matrix resin and a Izod impact value higher than the matrix resin to obtain a colored composition, followed by pulverizing and classifying the colored composition.
    Type: Grant
    Filed: April 14, 1992
    Date of Patent: June 7, 1994
    Assignees: Minolta Camera Kabushiki Kaisha, Mitsubishi Petrochemical Co., Ltd.
    Inventors: Sanji Inagaki, Shoichi Tsuge, Mineyuki Sako, Kenzo Toya, Yasuhiro Terunuma, Yukako Oya, Michio Ohmori
  • Patent number: 5314733
    Abstract: A multi-layer container having at least layer A comprising a polyolefin resin having an MFR of from 0.001 to 0.5 dg/min, layer B (adhesive layer) comprising an .alpha.,.beta.-unsaturated carboxylic acid (or anhydride)-modified polyolefin resin, and layer C comprising polyamide, polyphenylene ether, a compatibilizer, and an impact modifier, in which the polyphenylene ether is finely dispersed in the polyamide matrix. The container has excellent impermeability to hydrocarbon solvents and low-temperature impact resistance and is useful particularly as a gasoline tank.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: May 24, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Keiichi Saito, Koji Nishida
  • Patent number: 5310776
    Abstract: There is disclosed a process for preparing a thermoplastic resin composition which comprises melting and kneading(A) 100 parts by weight of a resin comprising 100% by weight in total of:(a) 5 to 95% by weight of a non-crystalline thermoplastic resin,(b) 95 to 5% by weight of a crystalline thermoplastic resin,(c) 0 to 50% by weight of a compatibilizer and(d) 0 to 40% by weight of an impact modifierand(B) 1.0 part by weight or more of an organic solvent in a kneader equipped with vent ports each having a vacuum device while maintaining each vent port at reduced pressure to make an organic solvent content in a final composition less than 1.0% by weight.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: May 10, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kiyoji Takagi, Yoshihiro Kurasawa, Koji Nishida, Shigekazu Ohi, Kenji Mori, Tsukasa Sato, Tosio Itou
  • Patent number: 5302645
    Abstract: Disclosed is a polyethylene terephthalate composition comprising:(A) 100 parts by weight of polyethylene terephthalate,(B) 1 to 25 parts by weight of a bisphenol type epoxy resin having an epoxy equivalent of 1000 or less,(C) 5 to 50 parts by weight of a thermoplastic resin,(D) 0 to 10 parts by weight of a modified thermoplastic resin containing at least one epoxy group, carboxyl group or carboxylic anhydride in a molecular chain of one molecule,(E) 0.1 to 2 parts by weight of a phosphorus type stabilizer and(F) 5 to 150 parts by weight of a glass fiber,wherein the composition has thermal stability, and is small in change of physical properties such as fluidity even when the composition dwells in a molding machine for a long time.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: April 12, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Seiko Nakano, Kiyoharu Yada
  • Patent number: 5301087
    Abstract: Disclosed is an electrolyte for an electrolytic capacitor which comprises a salt of a tertiary dicarboxylic acid represented by the following formula (I) or (II): ##STR1## wherein n represents an integer of 1 to 5, and R.sup.1 to R.sup.4 each represents an alkyl group having 4 or less carbon atoms, ##STR2## wherein n has the same meaning as defined above, l and m each represents an integer of 4 or 5, and R.sup.5 and R.sup.6 each represents hydrogen atom, methyl group or ethyl group,and an electrolytic capacitor using the same.
    Type: Grant
    Filed: February 27, 1992
    Date of Patent: April 5, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Makoto Ue, Masayuki Takeda, Tomohiro Satoh
  • Patent number: 5296304
    Abstract: A laminate film for stretch-wrapping is disclosed, comprising an intermediate layer containing from 50 to 95% by weight of an ethylene-.alpha.-olefin copolymer, a propylene-ethylene-.alpha.-olefin random copolymer, a propylene-.alpha.-olefin random copolymer, a butene-1 homopolymer, or a butene-1-ethylene copolymer and from 5 to 50% by weight of a hydrogenated block copolymer elastomer having laminated on both sides thereof a surface layer comprising from 75 to 95% by weight of ethylene and from 5 to 25% by weight of vinyl acetate. The film is excellent in stretchability, softness, tear strength, and in particular deformation recovery properties.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: March 22, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Takao Yazaki, Masataka Noro, Takashi Matsui