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公开(公告)号：DE69029620T2
公开(公告)日：1997-08-07
申请号：DE69029620
申请日：1990-08-08
Applicant: MITSUI TOATSU CHEMICALS
Inventor： ASANUMA TADASHI , SHIOMURA TETSUNOSUKE SHIOMURA , KIMURA SHIGERU , UCHIKAWA NOBUTAKA , KAWAI YOICHI , SUEHIRO KEIGO , FUKUSHIMA SATOSHI
IPC: D01F6/06
Abstract: A fiber excellent in strength and having an average size of 10,000 - 0.1 denier can be obtained by extruding a raw material composed mainly of a polypropylene having a syndiotactic pentad fraction of 0.7 or more and optionally stretching the resulting extruded material. By using as the raw material a composition consisting of two kinds of polypropylenes each having an intrinsic viscosity eta 1 or eta 2, the log( eta 2/ eta 1) being more than 0.05 or less than -0.05, and a syndiotactic pentad fraction of 0.7 or more at a weight ratio of 95 : 5 - 5 : 95 or a composition consisting of at least 50 parts by weight of a syndiotactic polypropylene having the intrinsic viscosity eta 1 and a syndiotactic pentad fraction of 0.7 or above and at most 50 parts by weight of an isotactic polypropylene having the intrinsic viscosity eta 2, the extrudability is improved and the fiber stretching conditions are broadened.
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公开(公告)号：DE69029620D1
公开(公告)日：1997-02-20
申请号：DE69029620
申请日：1990-08-08
Applicant: MITSUI TOATSU CHEMICALS
Inventor： ASANUMA TADASHI , SHIOMURA TETSUNOSUKE SHIOMURA , KIMURA SHIGERU , UCHIKAWA NOBUTAKA , KAWAI YOICHI , SUEHIRO KEIGO , FUKUSHIMA SATOSHI
IPC: D01F6/06
Abstract: A fiber excellent in strength and having an average size of 10,000 - 0.1 denier can be obtained by extruding a raw material composed mainly of a polypropylene having a syndiotactic pentad fraction of 0.7 or more and optionally stretching the resulting extruded material. By using as the raw material a composition consisting of two kinds of polypropylenes each having an intrinsic viscosity eta 1 or eta 2, the log( eta 2/ eta 1) being more than 0.05 or less than -0.05, and a syndiotactic pentad fraction of 0.7 or more at a weight ratio of 95 : 5 - 5 : 95 or a composition consisting of at least 50 parts by weight of a syndiotactic polypropylene having the intrinsic viscosity eta 1 and a syndiotactic pentad fraction of 0.7 or above and at most 50 parts by weight of an isotactic polypropylene having the intrinsic viscosity eta 2, the extrudability is improved and the fiber stretching conditions are broadened.
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公开(公告)号：DE3855259T2
公开(公告)日：1996-12-12
申请号：DE3855259
申请日：1988-12-16
Applicant: MITSUI TOATSU CHEMICALS
Inventor： ITOH MASAYOSHI , WAKIMURA KAZUO , TAKEUCHI RYO , IWATA KENJI , KOBAYASHI MINEO , ASANUMA TADASHI , OHNAKA JUNKO , TOKURA YOSHIKO , YAMAMOTO KAZUHIKO
IPC: C08F4/64 , C08F30/08 , C08F210/00 , C08F210/02 , C08F210/06 , C08F230/08
Abstract: The present invention relates to a process for preparing a silicon containing polymer by polymerizing an alkenylsilane or by copolymerizing an alkenylsilane and an alpha -olefin in the presence of a catalyst comprising (a) a titanium compound supported on a carrier of magnesium halide containing composition, and (b) an organic aluminum compound.
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54.发明专利
公开(公告)号：CA2040480C
公开(公告)日：1996-11-12
申请号：CA2040480
申请日：1991-04-15
Applicant: MITSUI TOATSU CHEMICALS
Inventor： ASANUMA TADASHI , MATSUZAWA HIROSHI , SASAKI TATEYO , KAWANISHI KAORU
IPC: C08F8/00 , C08F210/06 , C08F8/06 , C08L23/14
Abstract: Disclosed is a syndiotactic propylene copolymer containing 0.01 to 40 mol% of olefin units containing -OH group in a side chain. Of absorption peaks attributed to the methyl groups of the propylene units in an absorption spectrum by 13C-NMR of the copolymer, the intensity of an absorption peak observed at about 20.2 ppm is 0.3 or more of the intensity of absorption peaks of all the methyl groups attributed to the propylene units. The copolymer is produced by copolymerizing propylene and an alkenylsilane or alkenylborane compound in the presence of a catalyst system comprising an asymmetric ligands-having transition metal compound and an aluminoxane, followed by heat-treating the resulting propylene-alkenylsilane copolymer in the presence of a trialkylamine oxide and KF propylene-alkenylborane compound copolymer. Also disclosed is a resin composition comprising the copolymer and other polyolefin(s).
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公开(公告)号：CA2033286C
公开(公告)日：1996-10-08
申请号：CA2033286
申请日：1990-12-27
Applicant: MITSUI TOATSU CHEMICALS
Inventor： ASANUMA TADASHI , KAWANISHI KAORU , MATSUZAWA HIROSHI , NISHIMORI YUKARI
IPC: C08F30/08 , C08F210/00 , C08F230/08 , C08L23/10 , C08L23/14 , C08L29/00 , C08L43/04 , C08L53/00
Abstract: There is disclosed a homoplymer of an alkenylsilane having a syndiotactic structure and a copolymer of the alkenylsilane and an .alpha.-olefin. The polymer and the copolymer can be prepared by subjecting the alkenylsilane or the alkenylsilane and the .alpha.-olefin to addition polymerization in the presence of a transition metal compound having asymmetirically interconnected ligands or preferably in the presence of the transition metal compound and aluminoxane. The polymer and the copolymer can be used as a nucleating agent for a crystalline polypropylene.
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Patent Agency Ranking
公开(公告)号：DE69120454D1
公开(公告)日：1996-08-01
申请号：DE69120454
申请日：1991-04-07
Applicant: MITSUI TOATSU CHEMICALS
Inventor： ASANUMA TADASHI , SASAKI TATEYO , ITO MITSURU , KIMURA SHIGERU , INOUE TAKEO
Abstract: A method for molding a polypropylene or a propylene copolymer having a syndiotactic structure which comprises the steps of melting, molding, if desired, quenching and then stretching a propylene homopolymer or a copolymer of propylene and a small amount of ethylene or another alpha -olefin which has a substantially syndiotactic structure, or a mixture of the same and a small amount of a polypropylene having a substantially isotactic structure. The molded and stretched article can be heated at a temperature of a molding temperature or more, while a load is applied to the article. Furthermore, the molded and stretched article, if desired, can be treated with a hydrocarbon vapor, while a load is applied to the article. The molded article obtained by the method of the present invention has a novel crystalline structure.
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公开(公告)号：DE68925488T2
公开(公告)日：1996-08-01
申请号：DE68925488
申请日：1989-02-24
Applicant: MITSUI TOATSU CHEMICALS
Inventor： ASANUMA TADASHI , ITO MITSURU , KAWANISHI KAORU
IPC: C08F297/06
Abstract: A block copolymer of propylene is obtained by polymerizing alpha -olefins mainly comprising propylene in the presence of a catalyst comprising a transition metal catalyst and an organometal compound and thereafter copolymerizing alpha -olefins mainly comprising propylene and ethylene, and in at least part of the foregoing polymerization steps an alkenylsilane is copolymerized. The process conditions may be such that a silanol bond is formed. The alkenylsilane may have the general formula: CH2=CH-(CH2)nSiHmR3-m where n is 0 - 12, m is 1 - 3 and R is a methyl or phenyl group, or the general formula: CH2=CH-(CH2)nSiHpCl3-p where n is 0 - 12 and p is 0 - 3
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公开(公告)号：DE69114456T2
公开(公告)日：1996-06-27
申请号：DE69114456
申请日：1991-12-18
Applicant: MITSUI TOATSU CHEMICALS
Inventor： ASANUMA TADASHI , YAMAMOTO KAZUHIKO , KAWANISHI KAORU
Abstract: A method for preparing molded articles of a cross-linked polyolefin involves mixing polyolefin granules comprising polyolefin granules containing a hydrosilylation catalyst, polyolefin granules containing the copolymer of an alkenylsilane and an olefln, and if necessary, polyolefin granules containing neither the hydrosilylation catalyst nor the copolymer of the alkenylsilane and the olefin, and then heating, melting and molding the mixture in a molding machine. Molded articles of the crosslinked polyolefin contain no residual crosslinking agent and have improved heat resistance and mechanical strength can be obtained by the aforesaid method.
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公开(公告)号：DE69020865T2
公开(公告)日：1995-12-21
申请号：DE69020865
申请日：1990-11-12
Applicant: MITSUI TOATSU CHEMICALS
Inventor： ASANUMA TADASHI , SASAKI TATEYO , ITO MITSURU , SHIOMURA TETSUNOSUKE
IPC: C08J5/00 , B29C35/00 , B29C67/24 , B29C71/02 , B29K23/00 , B29K105/32 , C08F4/642 , C08F110/06 , B29C43/00 , C08L23/10
Abstract: A molded article of a syndiotactic polypropylene having excellent transparency in which a melting point attributed to the polypropylene having the syndiotactic structure measured at a heating rate of 10 DEG C/minute by differential scanning thermal analysis is represented by a substantially single peak, the aforesaid molded article being prepared by heating, melting and then hot-molding a homopolymer of propylene or a copolymer of propylene and a small amount of another olefin, which have a substantially syndiotactic structure, or a mixture of the homopolymer or the copolymer and a small amount of a polypropylene having a substantially isotactic structure, followed by quenching, or, after these steps, additionally subjecting the above molded article to a heat treatment at a temperature of less than its melting point. A method for preparing the above molded article is also disclosed here.
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公开(公告)号：DE69114456D1
公开(公告)日：1995-12-14
申请号：DE69114456
申请日：1991-12-18
Applicant: MITSUI TOATSU CHEMICALS
Inventor： ASANUMA TADASHI , YAMAMOTO KAZUHIKO , KAWANISHI KAORU
Abstract: A method for preparing molded articles of a cross-linked polyolefin involves mixing polyolefin granules comprising polyolefin granules containing a hydrosilylation catalyst, polyolefin granules containing the copolymer of an alkenylsilane and an olefln, and if necessary, polyolefin granules containing neither the hydrosilylation catalyst nor the copolymer of the alkenylsilane and the olefin, and then heating, melting and molding the mixture in a molding machine. Molded articles of the crosslinked polyolefin contain no residual crosslinking agent and have improved heat resistance and mechanical strength can be obtained by the aforesaid method.
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