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公开(公告)号：JPH03273049A
公开(公告)日：1991-12-04
申请号：JP7494590
申请日：1990-03-22
Applicant: TORAY INDUSTRIES
Inventor： MORITA TORU , NAGAHAMA AKIHIKO , UEDA TOMOAKI
Abstract: PURPOSE:To prepare a polyester compsn. which contains a colloidal silica with an improved dispersibility and has improved high-speed film-forming properties by adding a slurry comprising an alkali metal-contg. colloidal silica and a glycol to a transesterification product, removing the glycol from the reaction system, and conducting the polycondensation of the transesterification product. CONSTITUTION:In producing a polyester from an arom. dicarboxylate (e.g. dimethyl terephthalate) and a glycol (e.g. ethylene glycol), after the substantial completion of transesterification, a slurry comprising 1 pt.wt. colloidal silica contg. 0.5-1.0wt.% alkali metal (e.g. Na) and having a mean particle diameter of 50-1000mum and 5-20 pts.wt. glycol is added to the transesterification product. During or after the addition of the slurry, the glycol is removed from the reaction system while keeping the system at an atmospheric pressure; after the molar ratio of the glycol to the acid component reaches 1.5-3.0, the polycondensation is conducted at a reduced pressure, giving a polyester compsn. A film prepd. from the compsn. has a surface with a uniform unevenness and an improved slipperiness and is suitable for a magnetic medium.
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公开(公告)号：JPH03227328A
公开(公告)日：1991-10-08
申请号：JP2328690
申请日：1990-01-31
Applicant: TORAY INDUSTRIES
Inventor： KIDA KENJI , SASAKI TOSHIHIRO , UEDA TOMOAKI
Abstract: PURPOSE:To obtain the subject film, excellent in transparency and antistatic properties and useful as magnetic tapes, etc., by adding specific amounts of a specified alkylbenzenesulfonate and a polyorganosiloxane to an ethylene terephthalate-based polyester. CONSTITUTION:The objective film obtained by adding lithium salt (e.g. lithium octylbenzenesulfonate) of a 10-30C alkylbenzenesulfonic acid in an amount of 0.1-10 pts.wt., preferably 0.2-3 pts.wt. based on 100 pts.wt. polyester in which main constituent recurring units are ethylene terephthalate and a polyorganosiloxane (e.g. dimethylpolysiloxane) in an amount of 0.001-0.05, preferably 0.003-0.02 based on the lithium salt of the aforementioned alkylbenzenesulfonic acid to the above-mentioned polyester.
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公开(公告)号：JPH02117917A
公开(公告)日：1990-05-02
申请号：JP27184888
申请日：1988-10-27
Applicant: TORAY INDUSTRIES
Inventor： SUZUKI TOSHIHIRO , KIDA KENJI , UEDA TOMOAKI
IPC: C08G63/68 , C08G63/688 , C08J5/18
Abstract: PURPOSE:To obtain the title polyester suitable as drug packaging films, tacky films, tapes such as beltlike ribbons, having excellent adhesiveness, transparency and mechanical characteristics by copolymerizing a specific dicarboxylic acid with a glycol. CONSTITUTION:(A) >=70mol% terephthalic acid and (B) 2-10mol% aromatic dicarboxylic acid containing metallic sulfonate group as dicarboxylic acid components are reacted with (B) >=80mol% ethylene glycol and (D) 1-20wt.% (based on whole copolymer polyester) glycol shown by the formula (l and n are 3-50; n is 2-20) to give the aimed polyester.
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公开(公告)号：JPH02105845A
公开(公告)日：1990-04-18
申请号：JP25803588
申请日：1988-10-13
Applicant: TORAY INDUSTRIES
Inventor： MORITA TORU , NAGAHAMA AKIHIKO , UEDA TOMOAKI
Abstract: PURPOSE:To obtain a polyester composition improved in film-forming properties and giving a film improved in slidability and abrasion resistance, etc., by adding specified amounts of a glycol-soluble Mg or Mn compound, a glycol-soluble alkali metal compound, a phosphorous compound and inert inorganic particles to the reaction system in the production of a polyester. CONSTITUTION:An aromatic dicarboxylic acid ester (e.g., dimethyl terephthalate) and a glycol (e.g., ethylene glycol) are subjected to transesterification in the presence of a glycol-soluble Mg or Mn compound and a glycol-soluble alkali metal compound in an amount as specified by formula I (wherein A is the number of moles of the alkali metal atmos per 10 g of the polyester). The Mg or Mn compound in an amount satisfying formula II (wherein M is the total number of moles of the Mg or Mn atoms per 10 g of the polyester) is added to the reaction system. A phosphorous compound in an amount satisfying formula III (wherein P is the number of moles of the phosphorus atmos per 10 g of the polyester) is added to the reaction system. After 0.01-5wt.% inert inorganic particles of a mean particle diameter of 0.01-5mum are added to the reaction system, the polycondensation is completed to produce a polyester.
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公开(公告)号：JPH01153717A
公开(公告)日：1989-06-15
申请号：JP31350987
申请日：1987-12-10
Applicant: TORAY INDUSTRIES
Inventor： UCHIDA FUMIO , UEDA TOMOAKI
Abstract: PURPOSE:To obtain the title polymer scarcely containing coagulated particle, having excellent particle dispersibility and suitable for magnetic tape, etc., by adding calcium carbonate particles having specific average particle diameter and crystal particle diameter to a polyester derived from an aromatic dicarboxylic acid and a glycol. CONSTITUTION:The objective polyester can be produced by adding (A) calcium carbonate having an average particle diameter of 0.02-2.5mum and crystal particle diameter of 400-700Angstrom to a reaction system of (B) a bifunctional acid component composed mainly of an aromatic dicarboxylic acid and (C) a glycol component such as ethylene glycol at the initial stage of polymerization, e.g. in the stage of prepolymer and the components are subjected to polycondensation reaction. The component A is added in an amount of 0.005-5wt.% based on the polyester preferably as a slurry in the component C.
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Patent Agency Ranking
公开(公告)号：JPH0129810B2
公开(公告)日：1989-06-14
申请号：JP3315081
申请日：1981-03-10
Applicant: TORAY INDUSTRIES
Inventor： ODAJIMA AKIO , UEDA TOMOAKI , OKASAKA HIDESADA
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公开(公告)号：JPS6469623A
公开(公告)日：1989-03-15
申请号：JP22678087
申请日：1987-09-08
Applicant: TORAY INDUSTRIES
Inventor： MORITA TORU , KIDA KENJI , UEDA TOMOAKI
IPC: C08J5/18 , C08G63/181 , C08G63/78 , C08G63/82 , C08G63/86 , C08K3/00 , C08L67/00 , C08L67/03 , D01F6/92
Abstract: PURPOSE:To prepare a polyester causing either clogging nor filament breakage, by polycondensing an arom. dicarboxylic acid or the like with a glycol in the presence of an Sb compd. as a polycondensation catalyst with specific inactive inorg. particles added to the system to pulverize a precipitate Sb compd. CONSTITUTION:An arom. dicarboxylic acid such as terephthalic acid, or an ester-forming deriv. thereof such as dimethyl terephthalate is esterified with a glycol such as ethylene glycol or butanediol in the presence of 10-1,000ppm (based on the resulting polyester) of an Sb compd. soluble in the glycol and serving as a polycondensation catalyst, such as Sb2O3 or antimony acetate, with addition (which may be made after the esterification reaction) of 10-5,000ppm (based on the metallic Sb of the Sb compd.) of inactive inorg. particles contg. at least 80wt.% oxide, carbonate or sulfate of a metal selected from Ti, Al, Si, Ca, Ba and Bi to prepare a reaction product and an oligomer thereof, which are then polycondensed under reduced pressure at 230-300 deg.C.
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公开(公告)号：JPS61278558A
公开(公告)日：1986-12-09
申请号：JP12054185
申请日：1985-06-05
Applicant: TORAY INDUSTRIES
Inventor： UEDA TOMOAKI , UCHIDA FUMIO , OKASAKA HIDESADA
IPC: C08L67/00 , B29C55/02 , B29K67/00 , B29L7/00 , C08G63/00 , C08G63/78 , C08J5/18 , C08K3/28 , C08L67/02 , D01F6/92
Abstract: PURPOSE:To provide the titled compsn. which gives black spun-dyed yarn and black solution-dyed film having excellent surface properties, light screening properties and easy slipperiness, by incorporating fine titanium nitride powder in a polyester composed of a bifunctional acid component mainly composed of an arom. dicarboxylic acid and a glycol component. CONSTITUTION:0.01-20wt% fine titanium nitride powder having the max. particle size of 10mu or below, obtd. by heating metallic titanium or titanium oxide in N2 gas, is dispersed in a raw material consisting of an arom. dicarboxylic acid component such as terephthalic acid contg. not more than 20mol% of a comonomer such as isophthalic acid and a glycol component mainly composed of ethylene glycol and optionally a comonomer such as butylene glycol. A polymn. reaction is then carried out.
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公开(公告)号：JPH08287447A
公开(公告)日：1996-11-01
申请号：JP9281995
申请日：1995-04-18
Applicant: TORAY INDUSTRIES
Inventor： HORIUCHI MITSUHIRO , TSUKUDA AKIMITSU , UEDA TOMOAKI
Abstract: PURPOSE: To obtain a base film for magnetic recording medium having superior heat resistance, mechanical characteristics, smoothness, running performance and wear resistance and giving a magnetic recording medium excellent electromagnetic transducing characteristics, running performance and durability. CONSTITUTION: This base film is made of arom. polyamide or arom. polyimide, the contact angle of at least one side of the base film to water is >=50 deg. and the center line average roughness of the front side of this base film is 0.5-100nm.
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公开(公告)号：JPH08235568A
公开(公告)日：1996-09-13
申请号：JP3991495
申请日：1995-02-28
Applicant: TORAY INDUSTRIES
Inventor： HORIUCHI MITSUHIRO , TSUKUDA AKIMITSU , UEDA TOMOAKI
Abstract: PURPOSE: To provide a film having satisfactory smoothness, running performance, heat resistance and durability and excellent in electromagnetic transducing characteristics. CONSTITUTION: A magnetic layer is formed on one side of a substrate film of arom. polyamide or arom. polyimide to obtain the objective magnetic recording medium. The center line average roughness of the surface of the substrate film on the magnetic layer side is 0.5-100nm, the number of coarse protrusions on the surface of the substrate film on the magnetic layer side is
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