Title:
METHOD OF PRODUCING SYNDIOTACTIC POLYPROPYLENE
Document Type and Number:
WIPO Patent Application WO/1990/012038
Kind Code:
A1
Abstract:
A method of producing syndiotactic polypropylene characterized by washing a polymer produced by polymerizing propylene in the presence of a catalyst comprising a transition metal compound having unsymmetrical ligands with a hydrocarbon solvent. A syndiotactic polypropylene having further improved properties can be obtained by treating the formed polymer slurry with a mixture of a $g(b)-dicarboxy compound and an alcohol or with an alcohol containing hydrogen chloride under a nonaqueous condition to thereby solubilize the residue of the catalyst used in the polymerization in the hydrocarbon solvent before conducting the washing.
Inventors:
ASANUMA TADASHI (JP)
SHIOMURA TETSUNOSUKE (JP)
UCHIKAWA NOBUTAKA (JP)
SASAKI TATEYO (JP)
INOUE NORIHIDE (JP)
UCHIDA OSAMU (JP)
IWATANI TUTOMU (JP)
SHIOMURA TETSUNOSUKE (JP)
UCHIKAWA NOBUTAKA (JP)
SASAKI TATEYO (JP)
INOUE NORIHIDE (JP)
UCHIDA OSAMU (JP)
IWATANI TUTOMU (JP)
Application Number:
PCT/JP1990/000483
Publication Date:
October 18, 1990
Filing Date:
April 10, 1990
Export Citation:
Assignee:
MITSUI TOATSU CHEMICALS (JP)
International Classes:
C08F6/02; (IPC1-7): C08F6/08; C08F10/06
Other References:
J. Am. Chem. Soc. 1988 110, p. 6255-6256 (J. A. EWEN)
See also references of EP 0419681A4
See also references of EP 0419681A4
Attorney, Agent or Firm:
Wakabayashi, Tadashi (16th Kowa Bldg. 9-20, Akasaka 1-chom, Minato-ku Tokyo 107, JP)
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