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1. 发明专利

JP2000239500A PRODUCTION OF POLYESTER RESIN FOR COATING 失效
公开(公告)号：JP2000239500A
公开(公告)日：2000-09-05
申请号：JP4631999
申请日：1999-02-24
申请人： NIPPON ESTER CO LTD
发明人： KITSUKA YOSHIYUKI , KAJITANI WATARU , SUMI TAKAYUKI
IPC分类号： C08L67/02 , C08G63/181 , C08G63/78 , C09D167/02
摘要： PROBLEM TO BE SOLVED: To provide a process for effectively producing a polyester resin which has both a carboxyl group and a hydroxyl group at the end and is used for powder coating. SOLUTION: In producing a polyester resin consisting of an acid component comprising mainly an aromatic dicarboxylic acid and an alcohol component comprising mainly an aliphatic glycol and having an intrinsic viscosity of 0.15-0.40, an acid value of 20-50 mgKOH/g and a hydroxyl number of 5-20 mgKOH/g, a polyester (P) having an intrinsic viscosity of 0.20 or higher is subjected to depolymerization reaction by using a dibasic or higher acid component (A) and water in an amount of 0.02-0.1 mol for 1 mol of the acid component of the polyester (P).

2. 发明专利

JP2001072751A PREPARATION OF TITANIUM CATALYST SOLUTION AND PREPARATION OF POLYESTER USING SAME 失效
公开(公告)号：JP2001072751A
公开(公告)日：2001-03-21
申请号：JP24824999
申请日：1999-09-02
申请人： NIPPON ESTER CO LTD
发明人： KITSUKA YOSHIYUKI , KODE KENJI
IPC分类号： B01J21/06 , B01J35/12 , C08G63/85
摘要： PROBLEM TO BE SOLVED: To provide a method for preparing an alkylene glycol solution of a titanium catalyst which does not suffer oxidation by heat generated by stirring or circulation by a pump during long-term storage and exhibits excellent catalytic activities and to provide a method for preparing a polyester. SOLUTION: The subject method for preparing a titanium catalyst solution comprises mixing an alkylene glycol solution of a tetraalkoxytitanium with water in preparing an alkylene glycol solution containing 0.1-10 wt.% of a tetraalkoxytitanium and 0.5 to 2.0-fold moles of water based on 1 mole of the tetraalkoxytitanium. The titled method for preparing a polyester comprises the use of the titanium catalyst solution prepared by this method.

3. 发明专利

JP2000212268A DRYING OF COPOLYESTER 失效
公开(公告)号：JP2000212268A
公开(公告)日：2000-08-02
申请号：JP1712599
申请日：1999-01-26
申请人： NIPPON ESTER CO LTD
发明人： KITSUKA YOSHIYUKI , KODE KENJI
IPC分类号： C08G63/90 , F26B3/00
摘要： PROBLEM TO BE SOLVED: To provide a method for efficiently drying polyesters copolymerized with a phosphorus compound by inhibiting fusing and lowering in viscosity. SOLUTION: The major dicarboxylic acid component is terephthalic acid and the major diol component is ethylene glycol, and 0.5-3.0 mol% phosphorus compound based on the total acid component of the polyester is copolymerized and, simultaneously, polyester pellets having a water content of not less than 300 ppm are dried. In this instance, the polyester pellets are pre-dried in the temperature range of the glass transition temperature (Tg) of the polyester ±20 deg.C to render the water content less than 300 ppm, and subsequently dried at a temperature of not higher than the crystallization temperature (Tcc).

4. 发明专利

JP2001151876A METHOD FOR CLEANING POLYESTER POLYCONDENSATION REACTION APPARATUS 失效
公开(公告)号：JP2001151876A
公开(公告)日：2001-06-05
申请号：JP33245399
申请日：1999-11-24
申请人： NIPPON ESTER CO LTD
发明人： KITSUKA YOSHIYUKI
IPC分类号： C08G63/78
摘要： PROBLEM TO BE SOLVED: To provide a method for cleaning a polyester polycondensation reaction apparatus, capable of easily removing attached materials such as a polyester cross-linked material and carbonized material attached to the inner wall and upper part of the polyester polycondensation reaction apparatus, having an easy treating method after the cleaning, without having a problem such as a corrosion of the reaction vessel and not giving any bad effect to the polymerization of the polyesters after the cleaning. SOLUTION: This method for cleaning the polyester polycondensation reaction apparatus is provided by pouring a flake state polyester of low molecular weight obtained by using terephthalic acid as a main dicarboxylic acid component and ethylene glycol as a main glycol component, and >=5 wt.% ethylene glycol into the reaction apparatus and agitating at 240-300 deg.C.

5. 发明专利

JP2000212266A PREPARATION OF FLAME-RETARDANT POLYESTER 失效
公开(公告)号：JP2000212266A
公开(公告)日：2000-08-02
申请号：JP1712499
申请日：1999-01-26
申请人： NIPPON ESTER CO LTD
发明人： SAKAI MAKIKO , YASUHARA SHIGEFUMI , KITSUKA YOSHIYUKI
IPC分类号： C08G63/692 , C08G63/78
摘要： PROBLEM TO BE SOLVED: To prepare a flame-retardant polyester at a high productivity at a low cost by conducting esterification or transesterification in the presence of an organophosphorus compound in a specified amount in terms of phosphorus and an unsaturated aliphatic compound in a specified amount based on the organophosphorus compound. SOLUTION: The esterification or transesterification of at least one dicarboxylic acid (e.g. terephthalic acid) and at least one glycol (e.g. ethylene glycol) is conducted at 250 deg.C or higher in the presence of an organophosphorus compound of the formula in such an amount that the phosphorus content in the resultant polyester is 500 ppm or higher and an unsaturated aliphatic compound of the formula: X1-R4-X2 (e.g. itaconic acid) is in an amount of 0.9-1.2 mol per mol of the organophosphorus compound. Then, a catalyst (e.g. antimony dioxide) is added to the reaction system, which is then subjected to polycondensation at 220-290 deg.C to give a polyester. In the formulas, R1 and R2 are each H or a 1-12C hydrocarbon group; R4 is a 2-12C alkylene group having an unsaturated bond on the side chain or on the main chain; and X1 and X2 are each hyroxyl or carboxyl.

6. 发明专利

JPH11181069A PRODUCTION OF COPOLYMERIZED POLYESTER AND APPARATUS THEREFOR 失效
公开(公告)号：JPH11181069A
公开(公告)日：1999-07-06
申请号：JP34889297
申请日：1997-12-18
申请人： NIPPON ESTER CO LTD
发明人： KITSUKA YOSHIYUKI , NISHIYAMA KOKICHI
IPC分类号： C08G63/183 , C08G63/78
摘要： PROBLEM TO BE SOLVED: To stably obtain a poly(ethylene isophthalate/ethylene terephthalate)- based copolymerized polyester suitable for a container having gas barrier properties. SOLUTION: In producing a copolymerized polyester comprising an ethylene isophthalate unit and an ethylene terephthalate unit at a molar ratio of 95/5-15/85, a polycondensation reactor equipped with a separator 3 between a polycondensation reactor 1 and a condenser 4 is used to spray ethylene glycol at

7. 发明专利

JP2000053756A PRODUCTION OF COPOLYESTER AND DEVICE THEREFOR 失效
公开(公告)号：JP2000053756A
公开(公告)日：2000-02-22
申请号：JP22047698
申请日：1998-08-04
申请人： NIPPON ESTER CO LTD
发明人： NISHIYAMA KOKICHI , AKAO HIROTAKA , KITSUKA YOSHIYUKI
IPC分类号： C08G63/78
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a poly(ethylene isophthalate/ ethylene terephthalate) copolyester suitable for gas barrier containers, etc., capable of stably producing the copolyester, and to provide a device for producing the copolyester. SOLUTION: A method for producing a poly(ethylene isophthalate/ethylene terephthalate) copolyester comprising ethylene isophthalate units and ethylene terephthalate units in a molar ratio of 95/5 to 15/85. Therein, the characteristics comprise disposing a wet condenser 3 between a polycondensation reaction vessel 1 and a pressure-reducing device 7 and jetting ethylene glycol from the upper nozzle 4 of the wet condenser 3 in a shower state at jetting angles of 60-180 degree.

8. 发明专利

JP2000044667A PRODUCTION FOR COPOLYESTER 失效
公开(公告)号：JP2000044667A
公开(公告)日：2000-02-15
申请号：JP21690898
申请日：1998-07-31
申请人： NIPPON ESTER CO LTD
发明人： KITSUKA YOSHIYUKI , TANAKA AKISANE , YOSHIMOTO SEIICHI
IPC分类号： C08G63/127 , C08G63/88
摘要： PROBLEM TO BE SOLVED: To provide a production method for copolyester having stable qualities and good operability such as no adhesion between strands themselves nor nozzle- plugging in its pelletization of the polyester copolymerized with a multifunctional component having >=3 functions. SOLUTION: This method comprises production of a polyester of which main dicarboxylic acid component is terephthalic acid and main diol component is ethylene glycol and copolymerized with a multifunctional component having >=3 functions, filtration of the polyester after polycondensation with a wire net installed at upper part of the nozzle and having >=0.05 mm wire diameter and 0.5-5 mm opening diameter and withdrawing from the withdraw-nozzle.

9. 发明专利

JPH06239986A POLYCARBONATE 失效
公开(公告)号：JPH06239986A
公开(公告)日：1994-08-30
申请号：JP5007993
申请日：1993-02-15
申请人： NIPPON ESTER CO LTD
发明人： KITSUKA YOSHIYUKI , UEDA ATSUKO , MATSUMOTO TETSUO
IPC分类号： C08G64/08 , C08G64/00
摘要： PURPOSE:To obtain a polycarbonate made up of specific recurring unit, having intrinsic viscosity of a specified value or higher, excellent in heat resistance, flame retardancy and melt processability, useful for precision molded products, etc. CONSTITUTION:This polycarbonate is made up of recurring unit of formula I [Ar is trivalent (substituted) aromatic residue], with an intrinsic viscosity of >=0.5, which can be obtained, for example, by reaction between a compound of formula II and phosgene.

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