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).
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Patent number: 5391689Abstract: 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: GrantFiled: July 28, 1993Date of Patent: February 21, 1995Assignee: Polyplastics Co., Ltd.Inventors: Yukihiko Kageyama, Tatsuya Saito, Keiichi Kanaka, Kenji Hijikata
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Patent number: 5264516Abstract: 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: GrantFiled: August 17, 1992Date of Patent: November 23, 1993Assignee: Polyplastics, Co., Ltd.Inventors: Kenji Hijikata, Toshio Nakane, Yukihiko Kageyama
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Patent number: 5221729Abstract: 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: GrantFiled: September 20, 1991Date of Patent: June 22, 1993Assignee: Polyplastics Co., Ltd.Inventors: Keiichi Kanaka, Noriyuki Hayashi, Toshihiro Kobashi, Yukihiko Kageyama, Kenji Hijikata
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Thermoforming process for forming a sheet of polybutylene terephthalate into a transparent container
Patent number: 5213754Abstract: 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: GrantFiled: March 26, 1991Date of Patent: May 25, 1993Assignee: Polyplastics Co., Ltd.Inventors: Kuniaki Kawaguchi, Toshio Nakane, Hiroaki Konuma, Yukihiko Kageyama, Kenji Hijikata -
Patent number: 5183878Abstract: 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: GrantFiled: September 20, 1991Date of Patent: February 2, 1993Assignee: Polyplastics Co., Ltd.Inventors: Keiichi Kanaka, Noriyuki Hayashi, Toshihiro Kobashi, Yukihiko Kageyama, Kenji Hijikata
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Patent number: 5179192Abstract: 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: GrantFiled: September 20, 1991Date of Patent: January 12, 1993Assignee: Polyplastics Co., Ltd.Inventors: Keiichi Kanaka, Noriyuki Hayashi, Toshihiro Kobashi, Yukihiko Kageyama, Kenji Hijikata
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Patent number: 5173357Abstract: 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: GrantFiled: May 29, 1991Date of Patent: December 22, 1992Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Yukihiko Kageyama, Kenji Hijikata
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Patent number: 5139885Abstract: 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: GrantFiled: March 20, 1990Date of Patent: August 18, 1992Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata
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Patent number: 5132068Abstract: 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: GrantFiled: September 19, 1990Date of Patent: July 21, 1992Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata, Kenji Hijikata, Kuniaki Kawaguchi
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Patent number: 5091259Abstract: 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: GrantFiled: October 31, 1990Date of Patent: February 25, 1992Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Kenji Hijikata, Makoto Iiyama, Yukihiko Kageyama, Michirou Naka
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Patent number: 5086158Abstract: 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: GrantFiled: October 29, 1990Date of Patent: February 4, 1992Assignee: Polyplastics Co., Ltd.Inventors: Noriyuki Hayashi, Yukihiko Kageyama, Kenji Hijikata
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Patent number: 5079284Abstract: 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: GrantFiled: February 8, 1990Date of Patent: January 7, 1992Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Yukihiko Kageyama, Kenji Hijikata
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Patent number: 5049643Abstract: 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: GrantFiled: March 13, 1990Date of Patent: September 17, 1991Assignee: Polyplastics Co., Ltd.Inventors: Yukihiko Kageyama, Toshio Nakane, Kenji Hijikata
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Patent number: 5043215Abstract: 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: GrantFiled: April 30, 1990Date of Patent: August 27, 1991Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Kenji Hijikata, Yukihiko Kageyama, Michiro Naka
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Patent number: 5039760Abstract: 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: GrantFiled: February 2, 1990Date of Patent: August 13, 1991Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Michiro Naka, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata
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Patent number: 5034440Abstract: 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: GrantFiled: December 27, 1988Date of Patent: July 23, 1991Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata
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Patent number: 5006581Abstract: 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: GrantFiled: December 11, 1987Date of Patent: April 9, 1991Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Kenji Hijikata, Yukihiko Kageyama
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Patent number: 4994543Abstract: 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: GrantFiled: July 10, 1989Date of Patent: February 19, 1991Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata
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Patent number: 4987167Abstract: 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: GrantFiled: February 3, 1988Date of Patent: January 22, 1991Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Kenji Hijikata, Makoto Iiyama, Yukihiko Kageyama, Michirou Naka
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Patent number: 4983714Abstract: 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: GrantFiled: December 28, 1988Date of Patent: January 8, 1991Assignee: Polyplastics Co., Ltd.Inventors: Toshio Nakane, Yukihiko Kageyama, Hiroaki Konuma, Kenji Hijikata