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公开(公告)号：DE3750887D1
公开(公告)日：1995-02-02
申请号：DE3750887
申请日：1987-04-30
Applicant: TORAY INDUSTRIES
Inventor： OKITA SIGERU , YAMAMOTO YOSHIYUKI , HATSU TOSHIHIRO
Abstract: A process for producing an oxymethylene copolymer comprises the steps of polymerizing trioxane and cyclic ether in the presence of a boron trifluoride catalyst, adding a hindered amine compound to the polymer obtained by said polymerization, and stabilizing unstable chain ends of the polymer. The oxymethylene copolymer thus obtained provides excellent heat resistance and superior mechanical properties.
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公开(公告)号：DE3750887T2
公开(公告)日：1995-08-03
申请号：DE3750887
申请日：1987-04-30
Applicant: TORAY INDUSTRIES
Inventor： OKITA SIGERU , YAMAMOTO YOSHIYUKI , HATSU TOSHIHIRO
Abstract: A process for producing an oxymethylene copolymer comprises the steps of polymerizing trioxane and cyclic ether in the presence of a boron trifluoride catalyst, adding a hindered amine compound to the polymer obtained by said polymerization, and stabilizing unstable chain ends of the polymer. The oxymethylene copolymer thus obtained provides excellent heat resistance and superior mechanical properties.
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公开(公告)号：JPH10241215A
公开(公告)日：1998-09-11
申请号：JP4221097
申请日：1997-02-26
Applicant: TORAY INDUSTRIES
Inventor： KINOSHITA FUMIO , HATSU TOSHIHIRO , IWAMOTO MASAAKI
IPC: G11B7/26
Abstract: PROBLEM TO BE SOLVED: To control warpage of an optical recording medium substrate to within a specified range and the suppress fluctuation of warpage by controlling the whole flow rate of the air blown on the opposite side to a stamper to be specified times as the whole flow rate of the air blown to the stamper side. SOLUTION: Solenoid valves 68, 69 are opened several seconds before the dies air opened by a solenoid valve controller 70 so as to blow air from an air supply surface of a specified time. The air is blown through a filter 71, solenoid valves 68, 69, flow controlling diaphragms 66, 67, flow meters 64, 65, air passages 60, 62 to the space between the substrate and a stamper 30 and the space between the substrate and the cavity. In this process, the whole flow amt. of the air blown to the side opposite to the stamper is controlled to
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公开(公告)号：JPH09180273A
公开(公告)日：1997-07-11
申请号：JP35260095
申请日：1995-12-28
Applicant: TORAY INDUSTRIES
Inventor： HATSU TOSHIHIRO , KINOSHITA FUMIO , NAKANISHI TOSHIHARU
Abstract: PROBLEM TO BE SOLVED: To allow smooth thermal expansion of a stamper and to enable molding substrate of an optical recording medium of high quality. SOLUTION: At the time of molding the substrate of optical recording medium, this stamper 1 has an information region 3 for forming a groove and/or a pit for recording signals on the substrate 2 side. A thin thickness part 4 having a thickness thiner than the thickness at the information region 3 is formed in the radial direction of the stamper 1 from an outside of the information region 3 to the outer periphery of the stamper 1.
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公开(公告)号：JPH0954983A
公开(公告)日：1997-02-25
申请号：JP22591695
申请日：1995-08-10
Applicant: TORAY INDUSTRIES
Inventor： KINOSHITA FUMIO , HATSU TOSHIHIRO , NAKANISHI TOSHIHARU
Abstract: PROBLEM TO BE SOLVED: To improve flowability, transferability and mold releasability at the time of molding a substrate, to mold a high precision substrate and to obtain an optical recording medium having satisfactory recording and reproducing characteristics with the substrate. SOLUTION: A resin compsn. based on polycarbonate and contg. 0.001-0.05wt.% higher fatty acid ester of polyhydric alcohol based on the weight of the polycarbonate is molded to form a substrate. The ratio (Mw/Mn) of the wt. average mol. wt. (Mw) of the polycarbonate to the number average mol. wt. (Mn) is >=2.5 and the viscosity average mol. wt. of the polycarbonate is 13,000-18,000. A recording layer is formed on the substrate.
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Patent Agency Ranking
公开(公告)号：JPH06345937A
公开(公告)日：1994-12-20
申请号：JP13709593
申请日：1993-06-08
Applicant: TORAY INDUSTRIES
Inventor： MAKABE YOSHIKI , HATSU TOSHIHIRO , YAMAMOTO YOSHIYUKI
Abstract: PURPOSE:To obtain a resin composition improved in color ton and heat stability and reduced in mold deposit by mixing a polyacetal resin with dipentaerythritol and/or tripentaerythritol. CONSTITUTION:Trioxane and a cyclic ether or a cyclic formal are subjected to bulk polymerization in the presence of a polymerization catalyst, and the catalyst is deactivated to obtain a polyacetal resin. 100 pts. wt. this resin is mixed with 0.001-20 pts. wt. dipentaerythritol and/or tripentaerythritol and optionally 0.01-10 pts. wt. hindered phenolic compound of a molecular weight of 300 or below, 0.01-10 pts. wt. formaldehyde binding agent, and 0.01-10 pts. wt. alkaline earth metal salt of a fatty acid, and the obtained mixture is heated to 100-270 deg.C to eliminate unstable terminals.
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公开(公告)号：JPH059249A
公开(公告)日：1993-01-19
申请号：JP16134691
申请日：1991-07-02
Applicant: TORAY INDUSTRIES
Inventor： HATSU TOSHIHIRO , MAKABE YOSHIKI , YAMAMOTO YOSHIYUKI
Abstract: PURPOSE:To produce the title copolymer excellent in thermal stability. etc., by copolymerizing trioxane with a cyclic ether in the presence of a catalyst, deactivating the catalyst with a hindered amine, adding a stabilizer, water, etc., to the polymn. system, and thermally treating the system. CONSTITUTION:Trioxane is copolymerized with a cyclic ether (e.g. ethylene oxide) in the presence of a polymn. catalyst selected from the group consisting of boron trifluoride and a coordination compd. of boron trifluoride with an organic oxygen or sulfur compd. (e. g. boron trifluride diethyl etherate), thereby giving a copolymer comprising oxymethylene units and other oxyalkylene units. After the completion of copolymn., a hindered amine of the formula (wherein R is H or a 1-30C monovalent org. group; R to R are each 1-5C alkyl; n is 1 or higher; and R is an n-valent org. group) is added to the copolymn. system to deactivate the catalyst, then a stabilizer, water, and an alkali or alkaline earth metal salt are added to the system, and the system is thermally treated at 100-260 deg.C.
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公开(公告)号：JPH051125A
公开(公告)日：1993-01-08
申请号：JP15206391
申请日：1991-06-24
Applicant: TORAY INDUSTRIES
Inventor： HATSU TOSHIHIRO , MAKABE YOSHIKI , YAMAMOTO YOSHIYUKI
Abstract: PURPOSE:To obtain the copolymer having excellent thermal stability and mechanical properties by polymerizing trioxane with a cyclic ether in the presence of a specific catalyst, adding a specific compound to deactivate the catalyst, adding a stabilizer and water, and heating. CONSTITUTION:A mixture of trioxane and a cyclic ether is polymerized in the presence of 0.001-0.1 pts.wt. (use) based on 100 pts.wt. trioxane of a catalyst of a coordinated compound of boron trifluoride, and an O or S-containing organic compound (preferably boron trifluoride diethyl etherate), preferably 0.01-3 pts.wt. based on 100 pts.wt. oxymethylene copolymer of a compound shown by the formula (R is H or 1-30C monofunctional organic residue; R to R are 1-5C alkyl; (n) is >=1; R is n-functional organic residue) is added to deactivate the catalyst. Then, a stabilizer (preferably 0.1-10 pts.wt. based on 100 pts.wt. of the copolymer of hindered phenol compound) and water are added to the polymer system and heated at 100-260 deg.C to give the objective copolymer.
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公开(公告)号：JPH0465413A
公开(公告)日：1992-03-02
申请号：JP17750890
申请日：1990-07-06
Applicant: TORAY INDUSTRIES
Inventor： MAKABE YOSHIKI , YAMAMOTO YOSHIYUKI , HATSU TOSHIHIRO
Abstract: PURPOSE:To obtain the subject copolymer having excellent strength and thermal stability in a short time in high yield by preparatorily polymerizing a cyclic ether in the presence of a polymerization catalyst such as BF3, adding the polymerization product to trioxane, separately adding cyclic ether to trioxane and carrying out bulk-polymerization of the components. CONSTITUTION:The objective copolymer is produced by the bulk-polymerization of trioxane and a cyclic ether in the presence of a polymerization catalyst such as boron trifluoride, hydrated boron trifluoride and a coordination compound of boron trifluoride and an organic compound containing oxygen atom or sulfur atom. The polymerization is carried out by mixing a part of the cyclic ether supplied from a pipe 2 with the polymerization catalyst supplied from a pipe 1, preparatorily polymerizing the components, supplying the polymer to a polymerizer 5 and adding to trioxane supplied from a pipe 3, adding cyclic ether separately supplied from a pipe 2' singly to trioxane and reacting the components with each other.
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公开(公告)号：JP2002273760A
公开(公告)日：2002-09-25
申请号：JP2001080317
申请日：2001-03-21
Applicant: TORAY INDUSTRIES
Inventor： HATSU TOSHIHIRO , ETO SEIICHIRO , TANISUGI HIDEAKI
IPC: B29C45/20
Abstract: PROBLEM TO BE SOLVED: To provide a method for injection-molding a fiber reinforced thermoplastic resin capable of manufacturing a fiber reinforced resin injection-molded product excellent in mechanical characteristics and appearance. SOLUTION: In obtaining a molded object of a fiber reinforced thermoplastic resin by an injection molding method, a nozzle having a mechanism for mixing a molten fiber-containing resin material is used in an injection molding machine and the resin passed through the nozzle is injection-molded.
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