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1. 发明专利

JP2004175933A Polypropylene resin, method for producing the same and application to sheet 有权
公开(公告)号：JP2004175933A
公开(公告)日：2004-06-24
申请号：JP2002344204
申请日：2002-11-27
申请人： Mitsui Chemicals Inc , 三井化学株式会社
发明人： MATSUMURA HIDEJI , HARIMA SHIGERU , HASHIZUME SATOSHI , SASAKI YOSHIO , KIMURA TAKASHI
IPC分类号： C08J5/18 , C08F10/06
摘要： PROBLEM TO BE SOLVED: To provide a polypropylene resin providing a film hardly generating fisheyes when formed into a sheet or a film, and having high melt tension; and to provide a sheet comprising the polypropylene resin, and a method for producing the polypropylene resin.
SOLUTION: The polypropylene resin is obtained by a multistep polymerization method involving producing the polypropylene resin having 3.0-4.5dl/g intrinsic viscosity [η] at the first step in an amount regulated so that the proportion thereof may be 10-60wt.% based on the finally obtained polypropylene resin. The sheet is produced by heating and melting the polypropylene resin having 0.2-0.7g/10min melt flow rate (MFR) measured based on ASTM D-1238 (230°C, 2.16kg load), ≤100,000 Mn, ≥5.4 Mw/Mn, and ≥20 Mz/Mn measured by gel-permeation chromatography, and extruding the heated and melted resin from a T-die.
COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2004175976A Method for producing polypropylene resin suitable for film application 有权
公开(公告)号：JP2004175976A
公开(公告)日：2004-06-24
申请号：JP2002345581
申请日：2002-11-28
申请人： Mitsui Chemicals Inc , 三井化学株式会社
发明人： MATSUMURA HIDEJI , HARIMA SHIGERU , HASHIZUME SATOSHI , SASAKI YOSHIO , INUKAI AKIHIRO
IPC分类号： C08F10/06 , C08F8/04
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a polypropylene resin obtained by using a supported type titanium-based catalyst, and suitable for a capacitor film application without compounding a nucleating agent for a β-crystal. SOLUTION: The method for producing the polypropylene resin satisfying the following all characteristics by a multistep process is characterized by a molar ratio of titanium to a donor in the titanium catalyst regulated so as to satisfy the formula: 6≤(donor/titanium)≤20, coexistence of a titanium-based hydrogenation catalyst in a final step of the multistep polymerization, and the amount of the polypropylene resin having 2.8-4.0dl/g intrinsic viscosity at the final step in a proportion of 10-25wt.%: (i) Mn, Mw/Mn and Mz/Mn measured by a GPC method are ≤100,000, ≥5.4 and ≥20 respectively; (ii) the ash content is ≤50ppm; (iii) the proportion of the β-crystal of the sheet obtained by extruding the resin from a T-die is ≥0.25; and (iv) the number of fisheyes present in the sheet obtained by extruding the resin from the T-die and having ≥200μm diameter is ≤30/600cm 2 . COPYRIGHT: (C)2004,JPO

3. 发明专利

JP2004262993A Production method for propylene copolymer 有权
公开(公告)号：JP2004262993A
公开(公告)日：2004-09-24
申请号：JP2003052535
申请日：2003-02-28
申请人： Mitsui Chemicals Inc , 三井化学株式会社
发明人： MATSUMURA HIDEJI , HASHIZUME SATOSHI , HARIMA SHIGERU , SASAKI YOSHIO
IPC分类号： C08F297/08 , C08F4/642 , C08F4/6592 , C08F10/06
摘要： PROBLEM TO BE SOLVED: To provide a method which stably produces a propylene copolymer with few fish eyes and excellent in impact resistance and stiffness while preventing the fouling of a polymerization vessel without lowering the catalyst activity on a block copolymerization stage. SOLUTION: The production method comprises the first process wherein propylene is homopolymerized or copolymerized with another olefin so as to form 50-95 wt.% of the objective copolymer and the second step wherein propylene and the other olefin are successively copolymerized to form the 5-50 wt.% of the objective copolymer. In the method, a specific polyoxyethylene-polyoxypropylene glycol-based compound in an amount of 1-1,000 wt.% of the amount of a transition metal catalyst is continuously added to a polymerization mixture, and then, this polymerization mixture is subjected to the copolymerization of propylene and the other olefin by using at least one polymerization vessel. COPYRIGHT: (C)2004,JPO&NCIPI

4. 发明专利

JPH1112308A POLYMERIZATION OF PROPYLENE 失效
公开(公告)号：JPH1112308A
公开(公告)日：1999-01-19
申请号：JP16431397
申请日：1997-06-20
申请人： MITSUI CHEMICALS INC
发明人： ASANUMA TADASHI , YOSHIKAWA KOJI , KIMURA SHIGERU , HARIMA SHIGERU
IPC分类号： C08F2/02 , B01J19/18 , C08F4/642 , C08F4/659 , C08F4/6592 , C08F10/06
摘要： PROBLEM TO BE SOLVED: To obtain polypropylene in high yield by using a homogeneous catalyst comprising a carried catalyst component and an organometallic compound soluble in propylene, polymerizing propylene, as the propylene itself is used as a liquid medium, washing the resultant slurry with propylene to recycle the washing solution to the polymerization area and separating propylene from the slurry by evaporation. SOLUTION: In a preferred embodiment, a homogeneous catalyst comprising an aluminoxane-carrying carrier catalyst component as dimethylsilyl-bis(cyclopentadienyl)zirconium dichloride, etc., and an organometallic compound soluble in propylene as trimethyl aluminum, etc., is used to polymerize propylene by using propylene itself as a liquid medium. The polymerization system comprises the polymerization area and the slurry-washing area, the resultant polymer slurry is washed with propylene, the washing liquid is circulated to the polymerization area, while propylene is evaporated off from the washed slurry thereby producing polypropylene in high yield with the use of the organometallic compound reduced.

5. 发明专利

JPH1112336A PRODUCTION OF BLOCK COPOLYMER OF PROPYLENE 失效
公开(公告)号：JPH1112336A
公开(公告)日：1999-01-19
申请号：JP16856997
申请日：1997-06-25
申请人： MITSUI CHEMICALS INC
发明人： YOSHIKAWA KOJI , ASANUMA TADASHI , KIMURA SHIGERU , HARIMA SHIGERU
IPC分类号： C08F2/00 , C08F2/02 , C08F4/658 , C08F6/10 , C08F297/08
摘要： PROBLEM TO BE SOLVED: To carry out reutilization of recovered propylene and an inactive hydrocarbon compound and obtain a block copolymer in good productivity by using a specific catalyst system. SOLUTION: In producing polypropylene by initially polymerizing (D) propylene so that an amount of the resultant polypropylene is 40-95 wt.% based on total polymer by using a catalyst comprising (A) a transition metal catalyst component containing Mg and Ti, (B) an organoaluminum compound and (C) an alkoxysilicon compound and copolymerizing the component D with (E) ethylene so that an amount of the resultant polymer is 5-60 wt.% based on total polymer, (F) an inactive hydrocarbon compound is used as a diluent for the catalytic component and copolymerization of the component D with the component E is carried out in the presence of an alkylene glycol and a fraction after removing the component D as a low boiling point fraction is distilled in a first distillation tower in the presence of an excessive component B to remove a content having boiling point higher than the component F from the lower part of the distillation tower and a fraction extracted from the upper part of the distillation tower is introduced into a second distillation tower and low boiling point content is removed from the upper part and the component F is recovered from the lower part.

6. 发明专利

JPH1112310A POLYMERIZATION OF PROPYLENE 失效
公开(公告)号：JPH1112310A
公开(公告)日：1999-01-19
申请号：JP16603997
申请日：1997-06-23
申请人： MITSUI CHEMICALS INC
发明人： ASANUMA TADASHI , KIMURA SHIGERU , SUNAGA TADAHIRO , HARIMA SHIGERU , YOSHIKAWA KOJI
IPC分类号： C08F2/02 , C08F4/642 , C08F4/659 , C08F4/6592 , C08F10/06
摘要： PROBLEM TO BE SOLVED: To effect continuous propylene polymerization in high yield by using a homogeneous catalyst in the polymerization system comprising a plurality of polymerization zones, effecting the polymerization in a specific amount at a specific temperature in the first polymerization area filled with liquid propylene without vapor-phase space followed by the remaining polymerization over the specific temperature under the condition that there is vapor phases. SOLUTION: In a polymerization system comprising 2 or more polymerization areas, a homogeneous catalyst comprising a transition metal compound component [as ethylenebis(indenyl)zirconium dichloride, etc.], and an organometallic compound is used to polymerize less then 1/5 of the whole polymerization amount in the first polymerization area, as the propylene itself is used as a liquid medium at a temperature more than 10 deg.C lower the maximum polymerization temperature at the later polymerization area which is filled with the liquid phase without the vapor phase space. Then, the remaining polymerization is carried out under the condition that there is the vapor phase space at 60 deg.C or higher in the at least one of the following polymerization areas to obtain continuously polypropylene in high yield.

7. 发明专利

JPH10176023A PRODUCTION OF PROPYLENE BLOCK COPOLYMER 失效
公开(公告)号：JPH10176023A
公开(公告)日：1998-06-30
申请号：JP33837996
申请日：1996-12-18
申请人： MITSUI CHEMICALS INC
发明人： ASANUMA TADASHI , KIMURA SHIGERU , SUNAGA TADAHIRO , HARIMA SHIGERU
IPC分类号： C08F4/658 , C08F297/08
摘要： PROBLEM TO BE SOLVED: To efficiently produce a propylene block copolymer having excellent physical properties. SOLUTION: This propylene block copolymer is produced by bulk polymerization using a reaction system in which two or more polymerizer vessels are serially connected and uses a transition metal catalyst that has average particle size of 5-200μm, specific surface area of 100-400m /g, and pore volume of 0.05-0.30cc/g and which carries magnesium and titanium halides, an organoaluminum compound and electron donor compound, first producing a homopolymer of propylene so as to form 40-80wt.% of the whole polymer, and then producing a copolymer of propylene and ethylene so as to form 20-60wt.% of the whole polymer through the reaction system.

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