Patents Assigned to Mitsubishi Petrochemical Co., Ltd.
  • Patent number: 5283146
    Abstract: A photoconductive phthalocyanine composition is disclosed, comprising (A) a photoconductive phthalocyanine composition comprising 100 parts by weight of an unsubstituted phthalocyanine derivative and from 0.001 to 5 parts by weight of a nitro- or halogen-substituted phthalocyanine derivative and (B) from 0.01 to 10 parts by weight, per 100 parts by weight of the photoconductive phthalocyanine composition (A), of a phthalocyanine derivative having at least 4 electron attracting groups. A photosensitive layer formed of the photoconductive phthalocyanine composition produces digital signals whether input light is digital or not. It is useful as not only a photoreceptor for digital recording system of electrophotography but a photoreceptor for analogue light input in conventional PPC to provide a high quality image with sharp edges.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: February 1, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Toyoshi Ohashi, Toshiaki Ishibashi, Junko Gouda, Akira Itsubo, Toshiyuki Koyama, Masatomi Ozawa, Katsutosi Iijima
  • Patent number: 5266619
    Abstract: A plastic bumper for an automotive vehicle, of the type having so-called floating ribs for the purpose of weight-lightening and preventing surface sinkage due to resin shrinkage. The bumper is formed of a composition comprising (a) propylene-ethylene block copolymer in an amount ranging from 51 to 60 weight %, the block copolymer containing a content soluble in xylene at ordinary temperature, the content ranging from 3 to 8 weight %, and ethylene in an amount ranging from 3 to 8 mol %, the block copolymer having a MFR ranging from 20 to 40 g/10 min; (b) ethylene-propylene based copolymer rubber in an amount ranging from 20 to 30 weight %, the copolymer rubber having a MFR ranging from 0.1 to 2 g/10 min; and (c) talc in an amount ranging from 17 to 25 weight %, said talc having an average particle size ranging from 1.0 to 2.5 .mu.m. Additionally, the composition has (I) a flexural elastic modulus (at 23.degree. C.) not lower than 17000 Kg/cm.sup.2, (II) an Izod impact value (at -30.degree. C.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: November 30, 1993
    Assignees: Nissan Motor Co., Ltd., Mitsubishi Petrochemical Co., Ltd.
    Inventors: Masahiro Terada, Takashi Sugimoto
  • Patent number: 5266673
    Abstract: A hydroxy-substituted poly(phenylene ether) resin can be produced by copolymerizing from 1.5 to 8 mol % of a phenol compound selected from those represented by the following formulae (a), (b), (c), (d), and (e): ##STR1## and from 98.5 to 92 mol % of a phenol compound of the following formula (f): ##STR2## The hydroxy-substituted poly(phenylene ether) resin shows excellent compatibility with a polyamide, a polycarbonate, a poly(butylene terephthalate), a poly(phenylene sulfide), and is useful as a copatibilizer or a modified resin for engineering plastics.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: November 30, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Toru Tsukahara, Hiromi Nishimura, Mitsutoshi Aritomi, Yusuke Arashiro, Shinichi Yamauchi
  • Patent number: 5262233
    Abstract: An agricultural film comprising a thermoplastic resin film containing an ethylene copolymer with a hindered amine in its side chain and having coated thereon an anti-fogging agent comprising an inorganic hydrophilic colloidal substance and a hydrophilic organic compound and an anti-fogging agricultural film comprising a thermoplastic resin film containing an ethylene copolymer with a hindered amine in its side chain and, if desired, further containing a hydrotalcite compound, with an anti-fogging agent coated on the inside surface thereof or incorporated therein. The agricultural films have excellent weather resistance, anti-fogging properties, heat-retaining properties, and transparency.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: November 16, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kiyomaro Sudo, Seiya Mori, Tadao Okada, Hajime Ikeno, Keiko Shichijo, Shunichi Ohnishi
  • Patent number: 5262385
    Abstract: A compounds represented by the formula ##STR1## wherein X represents a fluorine atom,W represents an oxygen atom, sulfur atom or group --OCH.sub.2 --,Z.sup.1 and Z .sup.2 each represent a nitrogen atom or group CH, but when Z.sup.1 is a nitrogen atom, Z.sup.2 represents a nitrogen atom or group CH and when Z.sup.1 is a group CH, Z.sup.2 represents a nitrogen atom,R.sup.1 and R.sup.2 each independently represent either a hydrogen atom, halogen atom or mono- or dilower alkyl-substituted amino, or a lower alkyl, lower alkoxy or lower alkylthio each of which may be substituted with a halogen atom,R.sup.3 and R.sup.4 form together with the carbon atoms to which they bind respectively a 5- to 8-membered carbon ring.
    Type: Grant
    Filed: July 23, 1991
    Date of Patent: November 16, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Atsushi Goh, Sachio Kudo, Yorio Kumamoto, Michi Watanabe, Takako Takahashi, Takako Aoki, Norishige Toshima, Keiji Endo, Hideshi Mukaida, Shinji Kawaguchi, Rika Higurashi
  • Patent number: 5258545
    Abstract: There is disclosed a novel .gamma.-carboxyglutamic acid, a method for preparing the same and a method for preparing Gla.sup.17 human osteocalcin and Glu.sup.17 human osteocalcin or salts of these, which comprises introducing .gamma.-carboxyglutamic acid in a peptide synthetic method of human osteocalcin by use of a protected L-.gamma.-carboxyglutamic acid represented by the formula: ##STR1## wherein n represents 0, 1 or 2, or a salt thereof.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: November 2, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Takashi Kurihara, Eiji Taniyama, Sachio Hirose
  • Patent number: 5258252
    Abstract: An image-bearing member suitable for carrying an electrostatic image and/or a toner image is formed by forming a surface layer on a substrate or a photosensitive layer. The surface layer comprises a high-melting point polyester resin shows a good dispersibility of the cured resin to provide to provide a durable layer in combination with the cured resin, whereby the surface layer provides an image-bearing surface suitable for electrophotography. The surface layer may be a protective layer or a photoconductive layer when it constitutes a photosensitive member.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: November 2, 1993
    Assignees: Canon Kabushiki Kaisha, Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kiyoshi Sakai, Naoto Fujimura, Seikoh Nakano
  • Patent number: 5254742
    Abstract: A process for preparing 2-hexene-1,6-dial comprising dimerizing 2-propenal in the presence of an organometallic compound of the group VIII metal. The desired compound can be obtained under mild conditions with industrial advantages.
    Type: Grant
    Filed: October 8, 1992
    Date of Patent: October 19, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Yuji Ohgomori, Shuji Ichikawa, Takahiro Yoneyama, Naoko Sumitani
  • Patent number: 5252638
    Abstract: A casting resin composition curable with an epoxy resin curing agent is described, which comprises at least one kind of an epoxy resin selected from bisphenol A diglycidyl ether and bisphenol F diglycidyl ether, a tri-functional or tetra-functional liquid epoxy resin, and an iron powder, the ratio of the iron powder being from 60 to 80% by weight to the amount of the whole resin composition. The casting resin composition can give a cured product having a high hardness and an excellent abrasion resistance.
    Type: Grant
    Filed: August 21, 1991
    Date of Patent: October 12, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Toshio Sugimoto, Sadahiko Kawaguchi, Hiroshige Mori
  • Patent number: 5244983
    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## werein 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: July 18, 1991
    Date of Patent: September 14, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Yusuke Arashiro, Michiharu Kihira, Haruo Ohmura, Shinichi Yamauchi
  • Patent number: 5242990
    Abstract: A thermoplastic resin composition comprising (a) from 10 to 90% by weight of polyphenylene sulfide and (b) from 10 to 90% by weight of hydroxyalkylated polyphenylene ether which exhibits improved compatibility between components (a) and (b) and provides molded articles having characteristics inherent to polyphenylene sulfide and polyphenylene ether, i.e., excellent mechanical strength, excellent rigidity, and good appearance.
    Type: Grant
    Filed: August 13, 1991
    Date of Patent: September 7, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Yusuke Arashiro, Haruo Ohmura, Michiharu Kihira
  • Patent number: 5234524
    Abstract: There is provided a process for preparing a laminate, comprising the step of adhering a layer of an olefin polymer and a layer of a fluororesin to each other by fusion with the aid of an adhesive polymer, the adhesive polymer being a polymerization product A prepared by copolymerizing a radical-polymerizable olefin polymer B, which is obtained by reacting an olefin polymer (a) having at least one functional group in one molecule thereof with a radical-polymerizable monomer (b) having a functional group which can react with the functional group contained in the olefin polymer (a), with a monomer (c) which comprises as essential components alkyl acrylate, alkyl methacrylate and/or a fluorine-containing unsaturated monomer and is copolymerizable with the radical-polymerizable olefin polymer B, the polymerization product A comprising from 10 to 90 wt. % of the monomer (c).
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: August 10, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Takahiro Ozu, Keizo Abe, Kazuhide Hayama, Kazuyuki Hata
  • Patent number: 5225311
    Abstract: A positive photoresist composition is disclosed, comprising (a) from 50 to 99 parts by weight of a polyhydric phenol compound which is a condensation product between a mixed phenol comprising o-cresol and at least one of 2,5-dimethylphenol and 3,5-dimethylphenol at a molar ratio of from 95/5 to 5/95 and an aldehyde and (b) from 1 to 50 parts by weight of a quinone diazide compound. The composition is excellent in sensitivity, resolving power, heat resistance, and resistance to dry etching.
    Type: Grant
    Filed: April 5, 1991
    Date of Patent: July 6, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Toshitomo Nakano, Masumi Kada
  • Patent number: 5219600
    Abstract: A molded product for colored food, comprising (A) 0.01 to 1 part by weight of a hindered amine type light stabilizer and (B) 0.01 to 0.5 part by weight of an aromatic phosphite type and/or an aromatic phosphonite type antioxidant formulated per 100 parts by weight of a polyolefin containing substantially no phenol type antioxidant is disclosed.The molded product for colored food made of a polyolefin and having the composition of the present invention undergoes no discoloration even when contacted with a colored food for a long time and is also excellent in odor characteristic, mechanical characteristics and stability, etc., and therefore excellent as molded product for colored food, particularly sealed vessel, vessel for microwave oven heating.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: June 15, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kimiho Kosegaki, Akiyoshi Onishi, Masaru Inoue, Takashi Mori, Kazuhisa Tachi
  • Patent number: 5216038
    Abstract: A process for producing a foam comprising subjecting a foaming composition to foaming conditions, said foaming composition comprising (A) from 1 to 99% by weight, based on the total weight of (A) and (B), of a random copolymer comprising units derived from propylene, from 0.1 to 15 mol % of units derived from a non-conjugated diene represented by formula (I): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 each independently represents a hydrogen atom or an alkyl group having from 1 to 8 carbon atoms; and n represents a number of from 2 to 10, and, if desired, up to 4 mol % of units derived from ethylene, said random copolymer having a degree of crystallinity of at least 20% as measured by X-ray diffractometry, a melt flow rate of from 0.01 to 200 g/10 min as measured according to ASTM D1238-1986, and an elastic modulus of from 1,000 to 15,000 kg/cm.sup.2 as measured according to JIS K-7203, and (B) from 99 to 1% by weight, based on the total weight of (A) and (B), of a homopolymer of an .
    Type: Grant
    Filed: October 23, 1991
    Date of Patent: June 1, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventor: Shiroh Gotoh
  • Patent number: 5213890
    Abstract: A heat resistant composite film is described, which comprises (I) a thermoplastic film and (II) a cured layer of a thermosetting resin composition comprising (A) 100 parts by weight of an aliphatic diamine having a spiroacetal ring, (B) from 5 to 150 parts by weight of an ester derived from maleic acid and an alcohol represented by formula (I), and (C) from 20 to 250 parts by weight of an ester derived from a tetracarboxylic acid and an alcohol represented by formula (I),R.sup.1 --(OR.sup.2).sub.n --OH (I)wherein R.sup.1 represents an alkyl group having from 1 to 4 carbon atoms; R.sup.2 represents an alkylene group having from 2 to 4 carbon atoms; and n represents 0 or an integer of from 1 to 3. The composite film is resistant to temperatures of 150.degree. C. or higher while exhibiting flexibility.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: May 25, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kaoru Kanayama, Noriko Okazaki
  • Patent number: 5204025
    Abstract: A conductive paste composition is described, which comprises an epoxy resin having a diglycidylamino group, a resol type phenol curing agent, and copper powder. The paste composition exhibits excellent moisture resistance and adhesion and provides a cured film of high conductivity level.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: April 20, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kimiko Yamada, Katuyosi Yada, Hiromu Inoue, Yousui Nemoto
  • Patent number: 5202409
    Abstract: Disclosed is a process for preparing a polyhydroxyphenylene ether resin which comprises copolymerizing a phenol-substituted compound having hydroxyl group as a substituent, represented by the formula (I): ##STR1## wherein m and n each represents an integer satisfying the formulae 1.ltoreq.m and m+n.ltoreq.4; J represents {(HO).sub.a --R.sup.1 --S}.sub.b --R.sup.2 -- where a and b each represents an integer of 1 to 6; and R.sup.1 and R.sup.2 each represents unsubstituted or halogen-substituted alkylene, alkenylene or arylene, or alkylene; K represents halogen, primary or secondary alkyl, alkenyl, phenyl, aminoalkyl, haloalkyl, hydrocarbonoxy or halohydrocarbonoxy;with at least one phenol-substituted compound represented by the formula (II): ##STR2## wherein Qs each represents hydrogen, halogen, primary or secondary alkyl, alkenyl, aromatic, aminoalkyl, haloalkyl, hydrocarbonoxy or halohydrocarbonoxy,and a resin composition containing the polyhydroxyphenylene ether resin prepared by the above method.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: April 13, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Toru Tsukahara, Mitsutoshi Aritomi, Yusuke Arashiro, Shinichi Yamauchi, Hiromi Nishimura
  • Patent number: 5196598
    Abstract: A process for producing a polyhydroperoxy aromatic compound by oxidation of an aromatic hydrocarbon, e.g., 4,4'-diisopropylbiphenyl and 4,4'-diisopropylnaphthalene, with molecular oxygen is disclosed, in which the oxidation is carried out in the presence of a metal ion selected from cobalt, nickel, zinc and lead ions. Even in using a reaction apparatus made of an iron-containing metal generally employed in industry, a high conversion of secondary alkyl groups can be reached, and the desired polyhydroperoxy aromatic compound can be obtained in a high yield.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: March 23, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Hiroshi Iwane, Takahiro Sugawara, Naoki Suzuki, Kimiko Kaneko
  • Patent number: 5194511
    Abstract: There is disclosed an organic nonlinear optical material which comprises a polymer having the following constitutional units, in amounts of 5 to 100 mole % of (I) and 0 to 95 mole % of (II), and a weight average molecular weight (Mw) of the polymer being 10,000 to 2,000,000. ##STR1## wherein the symbols represent the same meanings as defined in the specification. ##STR2## A nonlinear optical element has large nonlinear optical effect and yet is excellent in molding processability so that it can be widely applied to the filed of optical processings.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: March 16, 1993
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Iwao Seo, Manabu Kishimoto, Atsushi Oda, Kenji Nakajima