公开(公告)号：ES2070252T3

公开(公告)日：1995-06-01

申请号：ES90122882

申请日：1990-11-29

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  KIMURA SHIGERU ,  UCHIKAWA NOBUTAKA ,  SHIOMURA TETSUNOSUKE

IPC: C08K5/17 ,  C08J5/18 ,  C08K5/34 ,  C08K5/3435 ,  C08K5/49 ,  C08K5/526 ,  C08L23/10 ,  C08L23/12 ,  A61L2/08

Abstract: A radiation-resistant polypropylene resin composition is disclosed which comprises a polypropylene having a substantially syndiotactic structure, and if desired, a phosphorus-containing anti-oxidant, an amine-containing anti-oxidant and/or a nucleating agent. Molded articles obtained from this resin composition can be utilized as containers for foods and medicines, and their physical properties scarcely deteriorate during sterilization by radiation.

公开(公告)号：DE69001593D1

公开(公告)日：1993-06-17

申请号：DE69001593

申请日：1990-08-01

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  SHIOMURA TETSUNOSUKE ,  SASAKI TATEYO ,  IWATANI TUTOMU ,  UCHIKAWA NOBUTAKA

IPC: C08F4/642 ,  C08F10/00 ,  C08F210/00 ,  C08F210/06 ,  C08F210/08

Abstract: A copolymer of propylene and butene-1, the constituent monomer units of which comprise 20 - 63 wt.% of propylene and 37 - 80 wt.% of butene-1, and which exhibits 0.5 or more in the ratio of the sum of the intensities of absorptions observed at about 20.0 - 21.0 ppm to the sum of the intensities of total absorptions attributable to the methyl groups in the propylene units observed at about 19.0 - 22.0 ppm in the C-NMR spectrum measured in a 1,2,4-trichlorobenzene solution and 0.05 or more in the intrinsic viscosity measured at 135 DEG C in a tetralin solution.

公开(公告)号：CA2019361C

公开(公告)日：1992-12-22

申请号：CA2019361

申请日：1990-06-20

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  SHIOMURA TETSUNOSUKE ,  UCHIKAWA NOBUTAKA ,  TAMAI YUKARI ,  SASAKI TATEYO ,  IWATANI TUTOMU

IPC: C08F10/14 ,  C08F110/14 ,  C08F210/16

Abstract: A polymer of 4-methylpentene-1 having a substantially syndiotactic structure, which polymer contains 0 to 30 mol% of the .alpha.-olefin unit other than the 4methylpentene-1 unit and has excellent physical properties.

公开(公告)号：BR9002744A

公开(公告)日：1991-08-20

申请号：BR9002744

申请日：1990-06-11

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  SHIOMURA TETSUNOSUKE ,  UCHIKAWA NOBUTAKA ,  IWATANI TUTOMU ,  TAKEUCHI KATSUMI

IPC: C08F2/44 ,  C08F297/08 ,  C08L23/12 ,  C08L23/14 ,  C08L23/16

Abstract: Disclosed herein is a polypropylene resin composition of a high syndiotacticity comprising a substantial homopolymer of propylene, in which the ratio of the intensity of the peak attributable to the syndiotactic pentad bonds to the sum of the intensities of all the peaks attributable to the methyl groups in the spectrum of the methyl groups measured by C-NMR is 0.7 or more, and a copolymer of ethylene and propylene, and a preparation process thereof.

公开(公告)号：CA1286839C

公开(公告)日：1991-07-23

申请号：CA523990

申请日：1986-11-27

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  FUJIO ICHIRO ,  UCHIKAWA NOBUTAKA

IPC: B01J19/00 ,  C08F4/60 ,  C08F4/64 ,  C08F10/00 ,  C08F10/06 ,  C08F110/06 ,  C08F2/00

Abstract: Disclosed herein is a process for continuously producing polypropylene at a constant production rate in the presence of a catalyst system composed of a transition metal catalyst and an organoaluminum compound. According to the present invention, the production rate of polypropylene, which is calculated based on the quantity of heat removed per unit time from a reaction tank operated at a constant temperature, is controlled by varying the amount of the organoaluminum compound to be charged, when the weight ratio of the organoaluminum compound to the transition metal catalyst both retained in the reaction tank is not greater than a preset value. The production rate of polypropylene may also be controlled by varying the amount of the transition metal catalyst to be charged, when the weight ratio of the organoaluminum compound to the transition metal catalyst both retained in the reaction tank is greater than a preset value. Polypropylene of uniform quality can therefore be produced at the desired constant production rate.

公开(公告)号：CA2018666A1

公开(公告)日：1990-12-12

申请号：CA2018666

申请日：1990-06-11

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  SHIOMURA TETSUNOSUKE ,  UCHIKAWA NOBUTAKA ,  IWATANI TUTOMU ,  TAKEUCHI KATSUMI

IPC: C08F2/44 ,  C08F297/08 ,  C08L23/12 ,  C08L23/14 ,  C08L23/16

Abstract: Disclosed herein is a polypropylene resin composition of a high syndiotacticity comprising a substantial homopolymer of propylene, in which the ratio of the intensity of the peak attributable to the syndiotactic pentad bonds to the sum of the intensities of all the peaks attributable to the methyl groups in the spectrum of the methyl groups measured by C-NMR is 0.7 or more, and a copolymer of ethylene and propylene, and a preparation process thereof.

公开(公告)号：CA2018145A1

公开(公告)日：1990-12-05

申请号：CA2018145

申请日：1990-06-04

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  SHIOMURA TETSUNOSUKE ,  NISHIMORI YUKARI ,  UCHIKAWA NOBUTAKA

IPC: C08F10/08 ,  C08F10/14 ,  C08F110/08 ,  C08F110/14

公开(公告)号：AU5433090A

公开(公告)日：1990-11-16

申请号：AU5433090

申请日：1990-04-17

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  SHIOMURA TETSUNOSUKE ,  UCHIKAWA NOBUTAKA ,  SASAKI TATEYO ,  INOUE TAKEO

IPC: B29C67/24 ,  B29C71/02 ,  C08J5/00 ,  C08K3/00 ,  C08K5/00 ,  C08L23/10

公开(公告)号：AU5358590A

公开(公告)日：1990-11-05

申请号：AU5358590

申请日：1990-04-10

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  SHIOMURA TETSUNOSUKE ,  UCHIKAWA NOBUTAKA ,  SASAKI TATEYO ,  INOUE TAKEO

IPC: B29C67/24 ,  B29C71/02 ,  C08J5/00 ,  C08K3/00 ,  C08K5/00 ,  C08L23/10

公开(公告)号：NO901914L

公开(公告)日：1990-10-29

申请号：NO901914

申请日：1990-04-27

Applicant: MITSUI TOATSU CHEMICALS

Inventor： ASANUMA TADASHI ,  SHIOMURA TETSUNOSUKE ,  UCHIKAWA NOBUTAKA ,  SASAKI TATEYO ,  UCHIDA OSAMU ,  IWATANI TUTOMU

IPC: C08F210/06