Patents by Inventor Yukihiko Kageyama

Yukihiko Kageyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5391689
    Abstract: A novel wholly aromatic polyester capable of forming an anisotropic melt phase is provided. Such polyester has been demonstrated to be capable of forming quality molded articles having a combination of excellent heat resistance and mechanical properties. The resulting polyester further is capable of readily being melt processed while using conventional equipment. Four essential recurring units are present in the polyester of the present invention wherein (I) is derived from 2,6-napthalenedicarboxylic acid and/or 4,4'-biphenyldicarboxylicacid; (II) is derived from another dicarboxylic acid (as defined) such as terephthalic acid; and (III) is derived from aromatic diols (as defined) such as 1,4-dihydroxybenzene and 4,4'-dihydroxybiphenyl; and (IV) is derived from another aromatic diol (as defined), such as 4,4'-dihydroxydiphenyl ether. In a preferred embodiment, an inorganic filler is dispersed therein.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: February 21, 1995
    Assignee: Polyplastics Co., Ltd.
    Inventors: Yukihiko Kageyama, Tatsuya Saito, Keiichi Kanaka, Kenji Hijikata
  • Patent number: 5264516
    Abstract: A silicon-containing polyacetal copolymer comprises silicone oil units having the formula (A) and polyacetal units: ##STR1## where R.sub.1 is an alkyl or phenyl group; R.sub.2 is a divalent organic group; X is a group selected from among --NH.sub.2, --OH, ##STR2## --R.sub.4 OH, --R.sub.5 COOH, --R.sub.6 COOR.sub.7, --R.sub.8 and OR.sub.9, where R.sub.3 is a divalent organic group, R.sub.4 .about.R.sub.6 are alkylene groups having 1 to 10 carbon atoms, R.sub.7 .about.R.sub.9 alkyl groups having 1 to 10 carbon atoms 1.about.10, and n is a number between 5.about.1000.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: November 23, 1993
    Assignee: Polyplastics, Co., Ltd.
    Inventors: Kenji Hijikata, Toshio Nakane, Yukihiko Kageyama
  • Patent number: 5221729
    Abstract: A polyester exhibiting melt anisotropy and improved thermal stability is provided which consists essentially of structural units represented by the formulas (i) to (iii), wherein: ##STR1## wherein Ar.sub.1 is 1,4-phenylene and/or 2,6-naphthalene, Ar.sub.2 is 2,6-naphthalene and/or 2,7-naphthalene, and X.sub.3 is an aliphatic hydrocarbon containing 2 to 8 carbon atoms.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: June 22, 1993
    Assignee: Polyplastics Co., Ltd.
    Inventors: Keiichi Kanaka, Noriyuki Hayashi, Toshihiro Kobashi, Yukihiko Kageyama, Kenji Hijikata
  • Patent number: 5213754
    Abstract: A transparent polyester container is produced by melt-molding a copolyester resin containing 75 to 98 molar % of repeating units of an ester of terephthalic acid with 1,4-butanediol with the balance mainly containing repeating units of an ester of terephthalic acid with an alkylene oxide adduct of a bisphenol compound, rapidly cooling the molding to prepare a sheet having a low crystallinity, maturing the sheet at a temperature selected so as to meet a requirement represented by the following formula (1) to prepare a sheet satisfying a requirement represented by the following formula (2) and subjecting the sheet to thermoforming through the use of a cavity mold at a temperature falling within a range represented by the following formula (3):______________________________________ Ta .ltoreq. Tcc (.degree.C.) (1) (.DELTA.Hcc).sub.a .gtoreq. 5 (J/g) (2) Tcc + 2 .ltoreq. Tb .ltoreq. Tm - 2 (.degree.C.) (3) ______________________________________whereinTa is the maturing temperature (.degree.C.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: May 25, 1993
    Assignee: Polyplastics Co., Ltd.
    Inventors: Kuniaki Kawaguchi, Toshio Nakane, Hiroaki Konuma, Yukihiko Kageyama, Kenji Hijikata
  • Patent number: 5183878
    Abstract: An improved easily processable wholly aromatic polyester exhibiting melt anisotropy and excellent thermal stability is provided which consists essentially of the structural units (i) to (iii) wherein: ##STR1## and wherein Ar.sub.1 is 1,4-phenylene, Ar.sub.2 is 2,6-naphthalene and 2,7-naphthalene, and Ar.sub.3 is 1,4-phenylene and/or 4,4'-biphenylene.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: February 2, 1993
    Assignee: Polyplastics Co., Ltd.
    Inventors: Keiichi Kanaka, Noriyuki Hayashi, Toshihiro Kobashi, Yukihiko Kageyama, Kenji Hijikata
  • Patent number: 5179192
    Abstract: An improved polyester exhibiting melt anisotropy and excellent thermal stability is provided which consists essentially of the structural units (I) to (III) wherein: ##STR1## wherein Ar.sub.1 is 1,4-phenylene, Ar.sub.2 is a mixed system of 2,6-naphthalene and 2,7-naphthalene, and Ar.sub.3 is an aromatic ring containing 6 or more carbon atoms, the unit (I) accounting for 15 to 90 mole percent and the unit (II) for 20 to 70 mole percent of the total amount of the structural units, and the percentage of 2,7-naphthalene to the total amount of Ar.sub.2 in the unit (II) being between 10 and 90 mole percent.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: January 12, 1993
    Assignee: Polyplastics Co., Ltd.
    Inventors: Keiichi Kanaka, Noriyuki Hayashi, Toshihiro Kobashi, Yukihiko Kageyama, Kenji Hijikata
  • Patent number: 5173357
    Abstract: Polyester film has a thickness of between 10 to 500 .mu.m and exhibits excellent tear strength retention against thermal history conditions. The film is prepared from a resin composition which includes 100 parts by weight of a polyester consisting essentially of alkylene terephthalate groups as the main recurring units in the polymer chain and between 0.1 to 5 parts by weight of a bisoxazoline compound incorporated thereinto. The film is usefully employed as a sterilizing bag or as a food-packaging material and can be laminated to anther sheet of film or to paper.
    Type: Grant
    Filed: May 29, 1991
    Date of Patent: December 22, 1992
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Yukihiko Kageyama, Kenji Hijikata
  • Patent number: 5139885
    Abstract: A resin composition, being useful for coating on electric wire, comprises an aromatic polyester, a halogenated compound such as diol, diglycidyl and dicarboxylic acid and a di-heterocyclic compound.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: August 18, 1992
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata
  • Patent number: 5132068
    Abstract: A process for producing a transparent film includes forming a melt from a copolyester having structural units represented by the following formulas I and II, respectively: ##STR1## wherein R groups may be the same or different from each other are each selected from the group consisting of--CH.sub.2 CH.sub.2, --CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 --, --CH--CH.sub.2 --, ##STR2## and the molar fraction ratio of the structural units of formula II to the total structural units of formulas I and II is between 0.02 to 0.020, which a melt of the copolyester is formed into a film, rapidly quenched to solidify the copolyester and impart low crystallinity thereto. The solidified film is aged at a temperature of 60 degree centigrade or below, and then heat-treated at a temperature between the glass transition point (Tg) of the copolyester and no greater than 2.degree. C. below the melting point of the copolyester minus 2.
    Type: Grant
    Filed: September 19, 1990
    Date of Patent: July 21, 1992
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata, Kenji Hijikata, Kuniaki Kawaguchi
  • Patent number: 5091259
    Abstract: A halogen-containing polyester resin composition comprises a flame retardant aromatic polyester copolymer having a halogen content of 0.5-30% by weight which is produced by condensation polymerization reaction of:(A) principally an aromatic dicarboxylic acid or an ester-forming derivative thereof,(B) principally an aliphatic glycol or an ester-forming derivative thereof, and(C) an ester-forming compound containing a halogen,and, in mixture therewith, 0.1-10% by weight of a bisoxazoline compound relative to the total weight of the composition.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: February 25, 1992
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Kenji Hijikata, Makoto Iiyama, Yukihiko Kageyama, Michirou Naka
  • Patent number: 5086158
    Abstract: A novel polyester is provided which forms an anisotropic melt phase in combination with good heat resistance and melt-processability. The polyester is formed from a combination of appropriate concentrations of four essential constituent units (as described). In a particularly preferred embodiment the polyester is derived from p-acetoxybenzoic acid, 4,4'-diacetoxydiphenyl, 2,2-propylidenebis(1,4-phenylene), and terephthalic acid. The resulting polyester is well suited to injection molding to form superior three-dimensional articles, fibers and films.
    Type: Grant
    Filed: October 29, 1990
    Date of Patent: February 4, 1992
    Assignee: Polyplastics Co., Ltd.
    Inventors: Noriyuki Hayashi, Yukihiko Kageyama, Kenji Hijikata
  • Patent number: 5079284
    Abstract: A polymer such as polyester is modified with reaction with a modifier of a compound having the formula: ##STR1## in which X is halogen, Y.sub.1 and Y.sub.2 are a three- to eight-membered ring, Z is a divalent organic group and n is 1 or more.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: January 7, 1992
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Yukihiko Kageyama, Kenji Hijikata
  • Patent number: 5049643
    Abstract: A wholly aromatic polyester is composed of naphthalene dicarboxylic acid units comprising 5 to 95 mole % of the unit having the formula (1) and 95 to 5 mole % of the unit having the formula (2) and aromatic diol units having the formula (3). It is improved in heat resistance and may be blended with a filler.
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: September 17, 1991
    Assignee: Polyplastics Co., Ltd.
    Inventors: Yukihiko Kageyama, Toshio Nakane, Kenji Hijikata
  • Patent number: 5043215
    Abstract: A halogen-containing polyester resin composition having an improved stable flexibility and flame retardency which comprises a bislactam compound and a flame-resisting aromatic polyester copolymers containing halogen at a ratio of 0.5 to 30% by weight, said copolymers being by the poly-condensation of(A) aromatic dicarboxylic acids or ester-forming derivatives thereof;(B) aliphatic glycols or ester-forming derivatives thereof; and(C) halogen-containing ester-forming compounds, said bislactam compound being present in a ratio of 0.1 to 10% by weight based on the total quantity of the composite.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: August 27, 1991
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Kenji Hijikata, Yukihiko Kageyama, Michiro Naka
  • Patent number: 5039760
    Abstract: A polyester resin composition exhibiting improved heat-resistant flexibility including (A) a polyester copolymer which is the polycondensation reaction product of (a) an aromatic dicarboxylic acid or an ester-forming derivative thereof, (b) an aliphatic glycol, and (c) between 0.001 to 1.0 mole %, based upon component (a), of a branch-forming compound, and (B) between 0.1 to 10% by weight (based on the total weight of the composition) of a bisoxazoline compound.
    Type: Grant
    Filed: February 2, 1990
    Date of Patent: August 13, 1991
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Michiro Naka, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata
  • Patent number: 5034440
    Abstract: An electric wire comprising a conductive wire in which the surface thereof is covered with a covering material having improved long-term thermal stability and comprising a polymer comprised of an aromatic polyester as a main skeleton and a compound represented by the following general formula (A) incorporated therein in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of said polymer: ##STR1## wherein X is a halogen, Y.sub.1 and Y.sub.2 which may be the same or different are each a functional group containing an epoxy group, Z is a divalent organic group and n is an integer of 1 or more.
    Type: Grant
    Filed: December 27, 1988
    Date of Patent: July 23, 1991
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata
  • Patent number: 5006581
    Abstract: A synthetic resin composition, having a high toughness and a wear resistance, comprises a synthetic resin with solubility parameter .delta.9.5 cal1/2 cm.sup.31 3/2 or higher and a modifier with solubility parameter .delta.8.5 cal.sup.1/2 cm.sup.-3/2 or lower and dispersed therein, characterized in that a silicon containing copolyester, being a block copolymer consisting of 1.about.90% by weight of siloxane segment represented by the undermentioned general formula (A) and 99.about.1% by weight of polyester segment represented by the undermentioned general formula (B), the degree of polymerization of siloxane segment being 1.about.2,000, and that of polyester segment 1.about.1,000, is added to be mixed therewith as a dispersibility improver: ##STR1## (In this formula, m denotes a number of 1.about.2,000.) ##STR2## (In this formula, R.sub.1 designates one or two or more members selected from among aromatic divalent radicals having 6.about.12 carbon atoms or aliphatic divalent radicals having 4.about.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: April 9, 1991
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Kenji Hijikata, Yukihiko Kageyama
  • Patent number: 4994543
    Abstract: A halogenated polyester resin composition is useful as coating for an electric wire and comprises a flame-retardant aromatic polyester copolymer having a halogen content of 0.5 to 30 wt. % which is produced by a polycondensation reaction of:(A) a mainly aromatic dicarboxylic acid or an ester-forming derivative thereof,(B) a mainly aliphatic glycol or an ester-forming derivative thereof, and(C) a halogenated ester-forming compoundand 0.1 to 10 wt. %, based on the total composition, of an isocyanate compound.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: February 19, 1991
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata
  • Patent number: 4987167
    Abstract: A halogen-containing polyester resin composition comprises a flame retardant aromatic polyester copolymer having a halogen content of 0.5-30% by weight which is produced by condensation polymerization reaction of:(A) principally an aromatic dicarboxylic acid or an ester-forming derivative thereof,(B) principally an aliphatic glycol or an ester-forming derivative thereof, and(C) an ester-forming compound containing a halogen,and, in mixture therewith, 0.1-10% by weight of a bisoxazoline compound relative to the total weight of the composition.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: January 22, 1991
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Kenji Hijikata, Makoto Iiyama, Yukihiko Kageyama, Michirou Naka
  • Patent number: 4983714
    Abstract: A resin composition useful for coating electrically conductive wires which comprises(A) a halogen containing polyester having a halogen content of 0.5 to 30 wt. % and being a polycondensation product of:(a) a component composed mainly of an aromatic dicaroxylic acid or an ester forming derivative thereof,(b) a component composed mainly of an aliphatic glycol or an ester forming derivative thereof, and(c) a component composed of an ester forming compound containing a halogen, and(B) 0.1 to 10 wt. %, based on the total composition, of a bisepoxy compound.
    Type: Grant
    Filed: December 28, 1988
    Date of Patent: January 8, 1991
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toshio Nakane, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata