Patents Assigned to Nippon Zeon Co. Ltd.
  • Blends of fluorinated and acrylic elastomers
    Patent number: 5902860
    Abstract: Compounds comprising a peroxide and a peroxide curable blend essentially consisting of hydrocarbon elastomers containing at least an acrylic monomer and of fluorinated VDF-based elastomers having in the polymer chain at least 5% by moles of hydrogenated groups C.sub.1 of the type ##STR1## --CH.sub.2 -- and/or --CH.sub.3, the amount of fluorinated rubber in the elastomeric blend being comprised from 5 to 75% by weight, said elastomers of the blend not containing iodine and/or bromine.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: May 11, 1999
    Assignees: Ausimont S.p.A., Nippon Zeon Co., Ltd.
    Inventors: Julio A. Abusleme, Anna Staccione, Vincenzo Arcella
  • Composition of epoxy group-containing cycloolefin resin
    Patent number: 5895800
    Abstract: A resin composition comprising an epoxy group-containing cycloolefin resin and a crosslinking agent is provided. More specifically, a resin composition comprising an epoxy group-containing thermoplastic norbornene resin obtained by introducing epoxy groups into a thermoplastic norbornene resin, and as the crosslinking agent, a curing agent for epoxy resins or a photoreactive substance is provided. The resin composition is suitable for use as an insulating material.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: April 20, 1999
    Assignees: Nippon Zeon Co., Ltd., Fujitsu Limited
    Inventors: Hideaki Kataoka, Eiko Yuda, Shigemitsu Kamiya, Masahide Yamamoto, Yoshikatsu Ishizuki, Yasuhiro Yoneda, Daisuke Mizutani, Kishio Yokouchi
  • Photosensitive composition from copolymers of ethylenic phosphorous monomer(s) and elastomer
    Patent number: 5889116
    Abstract: A photosensitive composition is provided, which comprises (A) 20-65 wt. parts of an elastomer, (B) 35-80 wt. parts of a hydrophilic copolymer consisting essentially of, based on the weight of the copolymer, (1) 1-30 wt. % of units of a phosphorus-, boron- or sulfur-containing monoethylenically unsaturated monomer, (2) 0.5-25 wt. % of units of a phosphorus-, boron- or sulfur-containing diethylenically unsaturated monomer, (3) 40-90 wt. % of units of a conjugated diene monomer, and (4) 0-58.5 wt. % of units of other copolymerizable monomer; the total amount of the elastomer (A) and the hydrophilic copolymer (B) being 100 wt. parts, (C) 5-100 wt. parts of a photopolymerizable ethylenically unsaturated monomer, and (D) 0.1-10 wt. parts of a photopolymerization initiator. The photosensitive composition is useful for the preparation of a flexographic printing plate.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: March 30, 1999
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Takao Suzuki, Atsuhiro Kanzaki
  • Method for producing electronic part sealed body
    Patent number: 5885505
    Abstract: A molding frame made by molding a thermoplastic norbornene resin which hardly deforms even after repeated use is used for production of electronic part sealed bodies by sealing the electronic devices of integrated circuits such as light emitting diodes, diodes, transistors, LSI devices, IC devices and CCD devices and capacitors, resistors, coils, microswitches and dipswitches with thermosetting resins such as epoxy resins as sealants.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: March 23, 1999
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Yuji Koushima, Teiji Kohara, Tadao Natsuume
  • Pattern forming process
    Patent number: 5886136
    Abstract: Disclosed herein is a pattern forming process comprising the steps of coating a substrate with a photosensitive resin composition comprising a polyamic compound having, at each terminal thereof, an actinic ray-sensitive functional group which has substituent groups each having a photopolymerizable carbon-carbon double bond, a photosensitive auxiliary having a photopolymerizable functional group, a photopolymerization initiator, and a solvent to form a film; subjecting the film to pattering exposure; and then developing the thus-exposed film with an alkaline developer or alkaline aqueous solution.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: March 23, 1999
    Assignees: Nippon Zeon Co., Ltd., Fujitsu Limited
    Inventors: Akira Tanaka, Masami Koshiyama, Kei Sakamoto, Yasuhiro Yoneda, Kishio Yokouchi, Daisuke Mizutani, Yoshikatsu Ishizuki
  • Rubber composition and process for producing the same
    Patent number: 5880206
    Abstract: A rubber composition comprising (1) a rubber ingredient comprising a diene polymer rubber having a primary amino group, and (2) silica. The diene polymer rubber having a primary amino group is obtained by allowing a diene polymer having an active metal bound to the polymer molecule, to react with a N-unsubstituted aziridine compound. The rubber composition is made advantageously by a process wherein the above-mentioned rubber ingredient is mixed with silica, and then, additives other than the silica are incorporated in the rubber ingredient/silica mixture. The rubber composition exhibits good rebound resilience tensile properties and abrasion resistance.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: March 9, 1999
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Masao Nakamura, Yukio Takagishi, Minoru Fukunaga
  • Recombinant Avipox virus encoding polypeptide of mycoplasma gallisepticum, and utilized a live vaccine
    Patent number: 5871742
    Abstract: A polypeptide exhibiting the antigenicity of Mycoplasma gallisepticum, a fused polypeptide comprising the above polypeptide and, connected to the N-terminus thereof, a signal membrane anchor of a type II outer-membrane polypeptide of a virus that infects birds, or a polypeptide capable of reacting with a mycoplasma-immune serum or a mycoplasma-infected serum and exhibiting a substantially pure antigenecity, respectively having amino acid sequences of about 32 kDa, about 40 kDa, or about 70 kDa. The expression with a recombinant virus of a polypeptide modified to such an extent as to exhibit an antigenicity equivalent to that of any of the above polypeptides. The use of a recombinant virus as a live vaccine.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: February 16, 1999
    Assignees: Nippon Zeon Co., Ltd, Shionogi & Co., Ltd.
    Inventors: Shuji Saitoh, Setsuko Ohkawa, Sakiko Saeki, Ikuroh Ohsawa, Hirono Funato, Yoshikazu Iritani, Shigemi Aoyama, Kiyohito Takahashi
  • Process for producing halogenated organic compound
    Patent number: 5866731
    Abstract: In a process for producing a halogenated organic compound wherein a hydrogen halide is added to an organic compound having an aliphatic carbon-carbon unsaturated bond, a catalyst is used, which is an organic compound having at least two polar groups in the molecule each containing a heteroatom having an unshared electron pair, and having no aliphatic carbon-carbon unsaturated bond. A typical example of the catalyst is a polyoxyalkylene glycol or a polyol having at least 3 hydroxyl groups.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: February 2, 1999
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Kiyoshi Watanabe, Tomoo Matsuura
  • Adhesive composition and composite of rubber with fiber
    Patent number: 5861212
    Abstract: An adhesive composition comprised of (A) a latex of 100 wt. parts of a carboxyl group-containing highly saturated nitrile-conjugated diene copolymer rubber, (B) 5-30 wt. parts of a resorcinol-formaldehyde resin, and (C) 2-10 wt. parts of an aromatic epoxy resin. A composite comprised of a nitrile group-containing highly saturated copolymer rubber and a fibrous material, which has been treated with the adhesive composition. This composite is useful for belts.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: January 19, 1999
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Osamu Mori, Mitsugu Ishihara
  • Resin composition and articles made therefrom
    Patent number: 5856395
    Abstract: The present invention relates to a resin composition having a high dielectric constant and a low dielectric loss tangent under high frequency conditions and articles obtained therefrom. The resin composition comprises 100 parts by weight of thermoplastic resin and 50-900 parts by weight of ferroelectric material. The formed articles can be used as substrates for a miniaturized antenna or circuit.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: January 5, 1999
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Hajime Tanisho, Yuji Koshima, Teiji Kohara
  • Laminate of vulcanizable rubber composition layers, process for producing rubber laminate, and rubber laminate
    Patent number: 5855976
    Abstract: A laminate of vulcanizable rubber composition layers, which comprises (i) a vulcanizable fluororubber composition layer comprising a fluororubber and a metal oxide and (ii) a vulcanizable nitrile rubber composition layer consisting essentially of a nitrile rubber, an organic phosphonium salt of the following formula (1), an organic peroxide crosslinking system, and an organic basic vulcanization accelerator: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrocarbyl, and no more than three thereof may be amino or fluoroalkyl; and R.sub.5 is hydrogen or alkyl. A vulcanized laminate made of the vulcanizable rubber composition layers is useful for a fuel hose or a diaphragm.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: January 5, 1999
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Motofumi Oyama, Kazuyoshi Nakajima
  • Vulcanizable rubber composition, seal used in dynamic state, and sealing material
    Patent number: 5852093
    Abstract: A vulcanizable rubber composition comprising 100 wt. parts of a highly saturated nitrile copolymer rubber having an iodine value not larger than 80, 3-30 wt. parts of a reinforcing filler, 30-200 wt. parts of an oxide of a metal of group 2 of the periodic table, 30-200 wt. parts of a non-reinforcing filler, and 0.1-20 wt. parts of a vulcanizer. A sealing material comprised of a vulcanizate of the vulcanizable rubber composition and having friction coefficient (.mu.) not larger than 1.5 and an abrasion wear of 150-350 mg. A seal comprising the sealing material and a reinforcing ring.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: December 22, 1998
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Yoshiaki Aimura, Suguru Ito
  • Process for producing fluorinated alkene and fluorinated alkane
    Patent number: 5847243
    Abstract: A vic-dichloro-fluorinated alkene of the formula: R.sup.1 --CCl.dbd.CCl--R.sup.2, and a fluorinated alkane of the formula: R.sup.1 --CR.sup.3 R.sup.4 --CR.sup.5 R.sup.6 --R.sup.2, wherein each of R.sup.1 and R.sup.2 independently represents a perfluoroalkyl group or both of R.sup.1 and R.sup.2 form together a perfluoroalkylene group, and R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently represent hydrogen or fluorine, are produced from an inexpensive raw material. More specifically, hexachlorocyclopentadiene is reacted with gaseous chlorine using an antimony catalyst, and then the reaction product is reacted with hydrogen fluoride to give 1,2-dichlorohexafluorocyclopentene. Thus-obtained compound is either (i) hydrogenated, or (ii) treated with a fluorinating agent to substitute the chlorine atoms by fluorine atoms, and then hydrogenated, to give the intended fluorinated alkane.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: December 8, 1998
    Assignees: Japan as represented by Director General of the Agency of Industrial Science and Technology, Nippon Zeon Co. Ltd.
    Inventors: Akira Sekiya, Toshiro Yamada, Kazunori Watanabe
  • Modified conjugated diene polymer, process for producing same and composition comprising same
    Patent number: 5844050
    Abstract: A modified polymer prepared by terminally modifying a conjugated diene polymer obtained by polymerization using a lanthanoid-containing catalyst in an organic solvent, with an N-substituted amino active compound, and having Mw of 100,000-1,000,000, a monomodal Mw-distribution, Mw/Mn of 1.3-5, and a terminal modification of at least 50%. The modified polymer is produced by (1) polymerizing a conjugated diene by using a catalyst which is either a mixture of (i) a reaction product of a lanthanoid-containing compound with an organoaluminum hydride and then with a Lewis base, and (ii) a halo-compound, or is a reaction product of (i) with (ii) prepared by reacting a portion of conjugated diene monomer prior to reaction of (ii); and then (2) terminally modifying the obtained living polymer with an N-substituted amino active compound.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: December 1, 1998
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Takahiko Fukahori, Kiyoshi Inamura
  • Double tube, balloon catheter produced by using double tube, and process for producing balloon catheter
    Patent number: 5833672
    Abstract: A double tube from which a balloon catheter having a high rigidity and a low fluid resistance can be easily produced by means of an extruder or the like, an apparatus for producing the double tube, a balloon catheter produced by using the double tube, and a process for producing the balloon catheter are provided. The double tube comprises an outer tube having a lumen extending from the distal end to the proximal end, and an inner tube which is provided within the outer tube and has a lumen extending from the distal end to the proximal end, wherein a longitudinal member in the strip form is provided as a connecting member which continuously connects the inner surface of the outer tube to the outer surface of the inner tube in the axial direction. A balloon catheter can be easily produced by using this double tube.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: November 10, 1998
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Keiichi Kawata, Hidenobu Urata, Tetsuo Toyokawa, Kouichi Sakai, Masaru Uchiyama
  • Vulcanizable rubber composition and hose
    Patent number: 5830941
    Abstract: A vulcanizable rubber composition comprising (1) a hydrogenated product of an unsaturated nitrile-conjugated diene-unsaturated carboxylic acid ester copolymer, (2) an ultrafine magnesium silicate powder having an average particle diameter of not larger than 10 .mu.m and (3) a vulcanizer. This rubber composition gives a vulcanizate having good resistance to hydrofluorocarbon gas transmission and good cold resistance, and is useful for a hose for hydrofluorohydrocarbon gas.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: November 3, 1998
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Yoshiaki Aimura, Suguru Ito, Tsuyoshi Konno
  • Photosensitive elastomer composition and photosensitive rubber plate
    Patent number: 5830621
    Abstract: The present invention is intended to provide a photosensitive rubber plate high in strength balance and image reproducibility and a photosensitive elastomer composition used for obtaining the rubber plate. A photosensitive elastomer composition is obtained by kneading 65 parts by weight of a phosphoric acid ester group-containing random copolymer (monomers composition: 60% of butadiene, 9% of methyl methacrylate, 20% of 2-methacryloxyethyl phosphate, 10% of styrene and 1% of divinylbenzene), 35 parts by weight of a polystyrene-polybutadiene-polystyrene type block copolymer, 15 parts by weight of 1,7-heptanediol dimethacrylate, 1 part by weight of benzoin methyl ether and 0.02 part of methylhydroquinone. By interposing this photosensitive elastomer composition between two polyester films and pressurizing them with a press, a photosensitive rubber plate having a total thickness of 3 mm is obtained.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: November 3, 1998
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Takao Suzuki, Fusayoshi Sakurai, Haruo Ueno, Tomohiro Shibuya
  • Plant growth promoter comprising jasmonate and brassinolide
    Patent number: 5814581
    Abstract: A plant growth promoter comprising as the active ingredients (i) a jasmonic acid or jasmonate of the formula (1): ##STR1## wherein R.sup.1 is pentyl or pentenyl and R.sup.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: September 29, 1998
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Shin-ichi Hirakawa, Yasuo Kamuro, Suguru Takatsuto, Tsuyoshi Watanabe, Hiroki Kuriyama
  • Unsaturated nitrile-conjugated diene copolymer process for producing same and vulcanizable rubber composition
    Patent number: 5807941
    Abstract: An saturated nitrile-conjugated diene copolymer obtained by copolymerizing acrylonitrile with butadiene in the presence of a free radical initiator and an alkylthiol compound as a molecular weight modifier. A part of the molecular weight modifier is incorporated in a monomer charge before polymerization, and the remainder thereof is incorporated in a polymerization mixture during polymerization. The alkylthiol compound has 12 to 16 carbon atoms, which include at least three tertiary carbon atoms, and further has a sulfur atom directly bound to at least one of the tertiary carbon atoms. The copolymer has a Mooney viscosity of 15 to 150 and contains 3 to 20 weight % of a fraction having a number average molecular weight of not larger than 35,000. The copolymer is used in combination with a sulfur-containing vulcanizer.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: September 15, 1998
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Suguru Tsuji, Yuichi Uchizono
  • Oil hose
    Patent number: 5795635
    Abstract: An oil hose comprised of (i) an inner layer made of a vulcanized hydrogenated nitrile rubber composition, an intermediate layer made of a vulcanized unsaturated nitrile-conjugated diene copolymer rubber composition, and an outer layer made of a vulcanized ozone-resistant rubber composition, or (ii) an inner layer made of a vulcanized rubber composition comprising a hydrogenated copolymer rubber composed of an unsaturated nitrile, a conjugated diene and a copolymerizable ethylenically unsaturated monomer, and an outer layer made of a vulcanized ozone-resistant rubber composition. This hose has good oil resistance, thermal resistance and copper ion resistance, and caulking in the portion thereof connected to a copper pipe is strong and oil leakage at a low temperature is prevented.
    Type: Grant
    Filed: January 5, 1995
    Date of Patent: August 18, 1998
    Assignee: Nippon Zeon Co., Ltd.
    Inventor: Yasunori Iwasaki