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公开(公告)号：JPH09324058A
公开(公告)日：1997-12-16
申请号：JP14553496
申请日：1996-06-07
Applicant: TORAY INDUSTRIES
Inventor： AOYAMA MASATOSHI , TSUKUDA AKIMITSU , SUZUKI MASARU
IPC: C08J5/18 , B32B27/28 , B32B27/34 , C08G59/32 , C08L29/04 , C08L71/00 , C08L71/02 , C08L77/00 , C08L77/06 , C08L77/10 , C08L79/08 , G11B5/73 , G11B5/733 , G11B5/704
Abstract: PROBLEM TO BE SOLVED: To prepare a base film for a high-density recording medium improved in surface smoothness, traveling properties, and abrasion resistance by incorporating specific polymer particles into an arom. polyimide film. SOLUTION: A monovinyl compd. having one aliph. unsatd. bond in the molecule and a compd. which has at least two aliph. unsatd. bonds and contains a compd. formed by the addition reaction of a compd. having at least two glycidyl groups in the molecule with an unsatd. monobasic acid are copolymerized to give polymer particles having a standard deviation of the distribution of average particle sizes of 0.5 or higher and contg. 2-60wt.% structural units represented by the formula. An arom. polyimide is compounded with 0.001-3wt.% above-obtd. particles, formed into a film, stretched at 100-500 deg.C at an areal stretching ratio of 0.8-5.0, and thermally treated at 100-500 deg.C for 1sec to 30min, thus giving a base film for a high-density recording medium having an average center-line roughness of 0.2-2nm, a Young's modulus of 3,900MPa or higher at least in one direction, and a coefficient of humidity expansion of 30×10 /%RH or lower at least in one direction.
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公开(公告)号：JPH09278996A
公开(公告)日：1997-10-28
申请号：JP11206596
申请日：1996-04-08
Applicant: TORAY INDUSTRIES
Inventor： SHIMIZU YUZO , AOYAMA MASATOSHI , SUZUKI MASARU
IPC: C08J5/18 , B29C55/02 , B29C65/02 , B29K67/00 , B29K105/16 , B32B15/08 , B32B15/09 , B32B27/36 , C08K3/08 , C08K3/34 , C08L67/02 , C08L67/03
Abstract: PROBLEM TO BE SOLVED: To obtain the subject composition excellent in flavor resistance, heat resistance, slipperiness, impact resistance and adhesivity to metal plates, and capable of being suitably used for food cans, beverage cans, etc., by adding specific particles to a polyester in a specified amount. SOLUTION: This polyester composition comprises (A) a polyester [e.g. polyethylene terephthalate or polyethylene 2,6-naphthalenedicarboxylate having a melting point of 150-250 deg.C, a diethylene glycol content of
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公开(公告)号：JPH07252408A
公开(公告)日：1995-10-03
申请号：JP4753194
申请日：1994-03-17
Applicant: TORAY INDUSTRIES
Inventor： AOYAMA MASATOSHI , KAGAMI NOBUYUKI , SUZUKI MASARU
Abstract: PURPOSE:To provide a composition containing two kinds of inorganic particles having different Mohs hardness, respectively, and having a specific difference between their average particle diameters, further containing crosslinked polymer particles, and used for films, such as magnetic tapes, having good slipperiness and high abrasion resistance. CONSTITUTION:A polyester composition contains (A) 0.05-3wt.% of inorganic particles having a Mohs hardness of ;260 a specific surface area of >=20-150m /g, and an average particle diameter of 0.05-0.5mum, (B) 0.05-3wt.% of inorganic particles having a Mohs hardness of m/g, and an average particle diameter of 0.1-1.0mum which is larger than that of the particles A, and (C) 0.05-3wt.% of crosslinked polymer particles having an average particle diameter of 0.1-1.0mum which has a difference of
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公开(公告)号：JPH07242802A
公开(公告)日：1995-09-19
申请号：JP3725694
申请日：1994-03-08
Applicant: TORAY INDUSTRIES
Inventor： AOYAMA MASATOSHI , KAGAMI NOBUYUKI , SUZUKI MASARU
Abstract: PURPOSE:To obtain a polyester composition composed of specific crosslinked polymer particles and a metal salt of sulfonic acid, excellent in abrasion resistance and antistaticity when formed into a film, a fiber, etc., and suitable for a magnetic recording medium. CONSTITUTION:This polyester composition is composed of crosslinked polymer particles of >=350 deg.C in a thermal decomposition temperature and 0.1-10wt.% of a metal salt of a sulfonic acid expressed by the formula R(X)nSO3M [R is a 5-30C alkyl; X is an aromatic group; (n)=0-1; M is an alkali metal element]. M is preferably lithium element. When compounded with 0.1-10wt.% of a polyoxyalkylene glycol having an average molecular weight of 1000-200000, the composition has extremely improved antistaticity. As the polyester, a polyethylene terephthalate, etc., is used. As the crosslinked polymer particle, a divinylbenzene polymer, etc., is used.
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公开(公告)号：JPH07126497A
公开(公告)日：1995-05-16
申请号：JP27387393
申请日：1993-11-01
Applicant: TORAY INDUSTRIES
Inventor： AOYAMA MASATOSHI , KOJIMA HIROJI , SUZUKI MASARU
Abstract: PURPOSE:To provide a polyester composition containing each specific a-type alumina particles and inert particles, capable of giving films excellent in wear resistance, thus suitable for magnetic recording media. CONSTITUTION:The objective composition can be obtained by incorporating a polyester (pref. polyethylene terephthalate or polyethylene 2,6- naphthalenedicarboxylate) with (A) 0.05-5wt.%, based on the final composition, of a-type alumina particles 10-40m /g in specific surface area and 0.05-0.5mum in average diameter and (B) pref. 0.05-5wt.%, based on the final composition, of inert particles /g in specific surface area and 0.1-1mum in average diameter (e.g. calcium carbonate particles). Both the particles A and B are incorporated in the polyester, for example, by directly adding these particles to the polymerization reaction system for the polyester.
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Patent Agency Ranking
公开(公告)号：JPH0753736A
公开(公告)日：1995-02-28
申请号：JP19944293
申请日：1993-08-11
Applicant: TORAY INDUSTRIES
Inventor： OKASAKA HIDESADA , SASAKI TOSHIHIRO , AOYAMA MASATOSHI
Abstract: PURPOSE:To produce a polyester film improved in abrasion resistance by melt extruding a polyester compsn. contg. agglomerates formed from primary particles with a specified mean diameter to thereby form a film contg. agglomerates with a mean diameter smaller than that of the agglomerates before the melt extrusion. CONSTITUTION:A polyester compsn., e.g. a polyalkylene terephthalate compsn., contg. agglomerates with a mean diameter of 50-2,000mum and formed from primary particles, such as of ZrO2, with a mean diameter of 1-50mum is melt extruded with e.g. a Dulmage type screw extruder at the m.p. of the polyester or higher but not higher than the m.p. plus 60 deg.C, giving a polyester film contg. 0.05-5wt.% agglomerates with a mean diameter of 30-500mum. The film is stretched longitudinally and transversely and thermaly set to give a biaxially oriented polyester film.
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公开(公告)号：JPH0711115A
公开(公告)日：1995-01-13
申请号：JP15767593
申请日：1993-06-28
Applicant: TORAY INDUSTRIES
Inventor： AOYAMA MASATOSHI , SUZUKI MASARU , AIZAWA HIDEYUKI
Abstract: PURPOSE:To obtain a polyester composition which gives a filmy, fibrous, or other material having good wearing resistance with little particle falling by incorporating a given amount of silicone particles having a specific average particle diameter and a specific composition. CONSTITUTION:Silicone particles which have an average particle diameter defined by equation I (wherein Dave is average particle diameter; Di is each of the diameters (mum) of the circles corresponding to individual particles; and (n) is the number of particles) of 0.01-2mum and consist of a polysiloxane represented by formula II (wherein R1 is methyl; R2 is amino, acryloyloxy, methacryloyloxy, epoxy, mercapto, chlorine, etc.; R3 is a 2C or higher alkyl, an alkenyl, phenyl, benzyl, phenethyl, a fluoroalkyl, etc.; and (l), (m), and (n) each is 0 or larger, provided that l+m+n=1 and 0.01
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公开(公告)号：JPH06345947A
公开(公告)日：1994-12-20
申请号：JP13796693
申请日：1993-06-08
Applicant: TORAY INDUSTRIES
Inventor： AOYAMA MASATOSHI , KAGAMI NOBUYUKI , SUZUKI MASARU
Abstract: PURPOSE:To obtain a polyester composition which can give a film resistant to peeling-off of particles and excellent in wear resistance and slidability by adding a specified amount of calcium carbonate particles having a specified mean particle diameter and a specified degree of sphericity to a polyester. CONSTITUTION:Calcium carbonate particles having a mean particle diameter of 0.01-3mum and a degree of sphericity as defined by the formula of 0.5-0.95 and being desirably cubic in shape are prepared. An example of the process for preparing these particles comprises blowing carbon dioxide into calcium hydroxide in a solvent such as water or methanol to form an amorphous gel product and forming this product into particles while controlling the particle shape, the particle diameter distribution, the particle diameter, etc., by changing synthetic conditions, additives, etc. These particles are added to a polyester (e.g. polyethylene terephthalate) or added to the reactional system during the production of a polyester to produce a polyester composition containing 0.005-5wt.% above particles.
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公开(公告)号：JPH06322243A
公开(公告)日：1994-11-22
申请号：JP11335393
申请日：1993-05-14
Applicant: TORAY INDUSTRIES
Inventor： NIINUMADATE HIROSHI , AOYAMA MASATOSHI , SUZUKI MASARU
Abstract: PURPOSE:To obtain a polyester compsn. which gives a film excellent esp. in resistances to abrasion and scratch by incorporating a specific particulate aluminum hydroxide into the compsn. CONSTITUTION:A particulate aluminum hydroxide represented by the formula (wherein n is a positive number) having a secondary particle size lower than 1mum is incorporated into a polyester. Examples of the aluminum hydroxide are boehmite, pseudoboehmite, and diaspore. The compsn. is prepd. by dispersing the aluminum hydroxide in a glycol used as a starting material of the polyester and adding the resulting slurry to the reaction system for producing the polyester or by mixing the aluminum hydroxide into a molten polyester. Pref. 0.01-10 pts.wt. the aluminum hydroxide is contained in 100 pts.wt. the polyester.
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公开(公告)号：JPH06287413A
公开(公告)日：1994-10-11
申请号：JP7442293
申请日：1993-03-31
Applicant: TORAY INDUSTRIES
Inventor： AOYAMA MASATOSHI , NIINUMADATE HIROSHI , SUZUKI MASARU
Abstract: PURPOSE:To obtain the subject polyester composition containing a thermoplastic polyester and inorganic fine particles coated with a zirconium compound and giving a film having high abrasion resistance and scratch resistance and useful for magnetic recording medium, etc. CONSTITUTION:The objective polyester composition useful for film for magnetic recording medium, etc., having excellent abrasion resistance and scratch resistance is composed of a thermoplastic polyester (e.g. polyethylene terephthalate) containing inorganic fine particles coated with a zirconium compound. The composition is produced by adding magnesium acetate, etc., as a catalyst to dimethyl terephthalate and ethylene glycol, carrying out ester interchange reaction under heating, incorporating the reaction product with an ethylene glycol slurry of inorganic fine particles (e.g. silica particles) coated with a zirconium compound (e.g. zirconia), antimony trioxide as a catalyst and trimethyl phosphate as a heat stabilizer and subjecting to polycondensation reaction by heating under reduced pressure.
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