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1. 发明专利

JPH0762009A VAPOR PHASE POLYMERIZATION OF OLEFIN 失效
公开(公告)号：JPH0762009A
公开(公告)日：1995-03-07
申请号：JP21298393
申请日：1993-08-27
申请人： UBE INDUSTRIES
发明人： IWAMOTO YASUMASA , YANO YUJI , SUZUKI KATSUNORI , SHINODA TADAOKI
IPC分类号： C08F2/34 , B01J8/18 , B01J8/24 , C08F2/00 , C08F10/00
摘要： PURPOSE:To prevent instability due to local polymerization heat, formation of mass and attachment of static electricity to the product by cooling a wall temperature of a reactor to a temperature lower than the dew point of fluid gas when olefin is subjected to continuous vapor phase polymerization in a fluid bed reactor. CONSTITUTION:In a method for subjecting an olefin to continuous vapor phase polymerization in a fluid bed reactor, the polymerization is carried out while cooling wall temperature of a reactor to a temperature lower than the dew point of fluid gas, preferably a temperature 5 deg.C lower than the dew point of the fluid gas. A cooling apparatus is attached to the reactor by the height which is one or two times longer than diameter of the reactor from the bottom of the reactor.

2. 发明专利

JP2001122919A METHOD FOR PRODUCING trans-1,4-POLYBUTADIENE 失效
公开(公告)号：JP2001122919A
公开(公告)日：2001-05-08
申请号：JP30179499
申请日：1999-10-25
申请人： UBE INDUSTRIES
发明人： IWAMOTO YASUMASA
IPC分类号： C08F136/06 , C08F4/68
摘要： PROBLEM TO BE SOLVED: To provide a new method for producing a trans-1,4-polybutadiene by using a catalytic system having improved polymerization activity. SOLUTION: This method for producing a trans-1,4-polybutadiene is characterized in that a catalyst comprising (A) an alkoxy group-containing vanadium compound and (B) an organometallic compound of the groups 1 to 3 of the periodic table is used.

3. 发明专利

JPH11269221A PROCESS FOR POLYMERIZATION OF BUTADIENE 失效
公开(公告)号：JPH11269221A
公开(公告)日：1999-10-05
申请号：JP7250398
申请日：1998-03-20
申请人： UBE INDUSTRIES
发明人： IWAMOTO YASUMASA , YUASA SAKAE , MAEDA KOJI , BANDAI SATOSHI
IPC分类号： C08F36/06 , C08F4/639 , C08F4/6392 , C08F4/68
摘要： PROBLEM TO BE SOLVED: To prepare at a high activity a micro polybutadiene which moderately contains 1,2-structures in the high-cis structure and has few trans structures. SOLUTION: When polymerizing a butadiene using (A) a metallocene complex of a transition metal compound and (B) a catalyst obtained from an ionic compound of a non-coordinating anion and a cation and/or aluminoxane, a catalytic component is prepolymerized before the polymerization is carried out. Here, the polymerization is carried out preferably after the catalytic component is brought into contact at 40 deg.C or lower for from 1 to 60 min.

4. 发明专利

JPH02220404A MANUFACTURE OF LAMINATED CERAMIC VARISTOR 失效
公开(公告)号：JPH02220404A
公开(公告)日：1990-09-03
申请号：JP3945089
申请日：1989-02-21
申请人： UBE INDUSTRIES
发明人： KITO RYOZO , FUKUDA KOICHI , IWAMOTO YASUMASA
IPC分类号： H01C7/10
摘要： PURPOSE:To acquire a low varistor voltage by forming a slurry in a sheet, thereafter by laminating the sheet and a metal thin film alternatively, and by carrying out integral junction through heat treatment. CONSTITUTION:After a slurry which consists of sintered ceramic fine powders, glass powders and organic binders having varistor characteristics is formed in a sheet, the sheet 1 and a metal thin film 2 are laminated alternatively and joined integrally through heat treatment. Then, an external electrode 3 of silver paste, etc., is applied to an end surface of the laminated body and heat treatment is carried out to manufacture a laminated ceramic varistor readily. Thereby, it is possible to manufacture a proper laminated ceramic varistor which has a low varistor voltage as in a case of a thin film sheet.

5. 发明专利

JP2001081135A TRANS-1,4-POLYBUTADIENE AND ITS PRODUCTION 失效
公开(公告)号：JP2001081135A
公开(公告)日：2001-03-27
申请号：JP36922399
申请日：1999-12-27
申请人： UBE INDUSTRIES
发明人： IWAMOTO YASUMASA
IPC分类号： C08F36/06 , C08F4/639 , C08F4/68
摘要： PROBLEM TO BE SOLVED: To obtain trans-1,4-polybutadiene whose phase transition mostly occurs at high temperatures and capable of recovering large quantity of heat. SOLUTION: This trans-1,4-polybutadiene is characterized by having >=95 mol% trans-1,4 structure and =70 j/g heat release within 10 deg.C from the phase transition- beginning temperature measured by isothermal cooling with differential scanning calorimeter method.

6. 发明专利

JP2001048918A PRODUCTION OF TRANS-1,4-POLYBUTADIENE 失效
公开(公告)号：JP2001048918A
公开(公告)日：2001-02-20
申请号：JP22529199
申请日：1999-08-09
申请人： UBE INDUSTRIES
发明人： IWAMOTO YASUMASA , TAKAHASHI JUNYA , OKUBO YOICHI
IPC分类号： C08F2/34 , C08F4/639 , C08F4/68 , C08F36/06
摘要： PROBLEM TO BE SOLVED: To provide a method for the highly active production of trans-1,4- polybutadiene in the presence of a carried catalyst. SOLUTION: This method for producing trans-1,4-polybutadiene comprises polymerizing butadiene in the presence of a carried catalyst prepared by carrying a vanadium compound (for example, a halogen-containing magnesium compound) on a carrier comprising an inorganic magnesium compound.

7. 发明专利

JP2000226409A PRODUCTION OF TRANS-1,4-POLYBUTADIENE 失效
公开(公告)号：JP2000226409A
公开(公告)日：2000-08-15
申请号：JP2805899
申请日：1999-02-05
申请人： UBE INDUSTRIES
发明人： IWAMOTO YASUMASA , TAKAHASHI JUNYA
IPC分类号： C08F2/34 , C08F4/639 , C08F4/68 , C08F36/06
摘要： PROBLEM TO BE SOLVED: To obtain a trans-1,4-polybutadiene in high activity by polymerizing butadiene in the presence of a catalyst prepared by impregnating a mixture comprising a vanadium compound, an organometallic compound with a group 1, 2 or 3 metal, and butadiene into a support produced by contact of an inorganic oxide with an alkylaluminum compound. SOLUTION: The organic oxides used are exemplified by silica, alumina, magnesia, titania, zirconia, and calcia. The inorganic oxides are desirably in the form of porous microparticles having a mean particle diameter of 5-150 μm and a specific surface area of 2-800 m2/g and is used after being heat-treated at, say, 100-800 deg.C. It is desirable that the contact of the inorganic oxide with the alkylaluminum is performed under substantially anhydrous conditions. The vanadium compounds used are exemplified by vanadium triacetylacetate, vanadium trichloride/THF complex, vanadium oxytrichloride, and vanadium naphthenate. The polymerization method adopted is desirably a gas phase polymerization process.

8. 发明专利

JP2000136210A PRODUCTION OF CONJUGATED DIENE POLYMER 失效
公开(公告)号：JP2000136210A
公开(公告)日：2000-05-16
申请号：JP30699698
申请日：1998-10-28
申请人： UBE INDUSTRIES
发明人： TSUJIMOTO NOBUHIRO , MAEDA KOJI , MURAKAMI MASATO , SUZUKI MICHINORI , IWAMOTO YASUMASA , YUASA SAKAE
IPC分类号： C08F4/68 , C08F4/6392 , C08F36/04
摘要： PROBLEM TO BE SOLVED: To provide a method for producing in high polymerization activity a conjugated diene polymer with controlled microstructure in a catalytic system using a metallocene complex of a transition metal compound. SOLUTION: This method for producing a conjugated diene polymer comprises polymerization of the corresponding conjugated diene compound using a catalyst made from (A) a metallocene complex of a transition metal compound, (B) an ionic compound made from a non-coordinative anion and cation, (C) a group I-III organometallic compound, and (D) water (wherein the molar ratio C/D is 0.66-5).

9. 发明专利

JPH11236411A PRODUCTION OF POLYBUTADIENE 失效
公开(公告)号：JPH11236411A
公开(公告)日：1999-08-31
申请号：JP34942198
申请日：1998-12-09
申请人： UBE INDUSTRIES
发明人： TSUJIMOTO NOBUHIRO , IWAMOTO YASUMASA
IPC分类号： C08L9/00 , C08F2/38 , C08F4/642 , C08F4/6592 , C08F136/06 , C08L47/00
摘要： PROBLEM TO BE SOLVED: To obtain a mixture of a high-molecular weight polybutadiene component and a low-molecular weight polybutadiene component in a high polymerization activity, useful as a rubber component for an impact-resistant polystyrene- based resin, by polymerizing butadiene by using a polymerization catalyst comprising a specific component. SOLUTION: Butadiene is polymerized in the presence of a catalyst comprising (A) a metallocene type complex of a transition metal compound and (B) an ionic compound of a non-coordinating anion and a cation and/or an aluminoxane to give a mixture which has 4-30% of 1,2-structure content, 65-95% cis-1,4-structure content and

10. 发明专利

JPH11181202A IMPACT-RESISTANT POLYSTYRENE-BASED RESIN COMPOSITION 失效
公开(公告)号：JPH11181202A
公开(公告)日：1999-07-06
申请号：JP35071497
申请日：1997-12-19
申请人： UBE INDUSTRIES
发明人： TSUJIMOTO NOBUHIRO , IWAMOTO YASUMASA , ASAKURA YOSHIO
IPC分类号： C08L25/04 , C08F279/02 , C08L47/00
摘要： PROBLEM TO BE SOLVED: To obtain a polystyrene-based resin excellent in impact resistance at low temperature and flatting by including a specific polybutadiene composition as the rubber component. SOLUTION: This composition is composed of 2 to 25 wt.% of a polybutadiene rubber composition and 98 to 75 wt.% of a polystyrene-based resin, the former being composed of (A) 65 to 30 wt.% of a high-molecular- weight polybutadiene containing, as the major ingredient, a polybutadiene having an intrinsic viscosity [η] of 3.0 to 7.0 determined in toluene at 30 deg.C and a cis- structure content of 80% or more, and (B) 35 to 70 wt.% of a low-molecular- weight polybutadiene containing, as the major ingredient, a polybutadiene having an intrinsic viscosity [η] of 0.1 to 0.5 determined in toluene at 30 deg.C.

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