Title:
PROCESS FOR PRODUCING OLEFIN POLYMER AND ETHYLENE POLYMER
Document Type and Number:
WIPO Patent Application WO/1995/018158
Kind Code:
A1
Abstract:
A process for producing an olefin polymer in an economically quite advantageous manner by polymerizing an olefin in the presence of a polymerization catalyst having a high activity and an excellent ability to effect copolymerization even when the amount of an expensive aluminum compound used as a promoter is reduced; and an ethylene polymer having an excellent moldability and good mechanical properties, heat-sealability and ESCR. The process comprises homo- or copolymerizing an olefin or olefins in the presence of a polymerization catalyst containing a transition metal compound (A) represented by the general formula CpMLx-1 (wherein M represents a group 4 metallic element, etc.; Cp represents a cyclic compound group having a cyclopentadienyl skeleton; L represents a 'sigma' ligand; and x represents the valency of M) and an aluminumoxy compound (B) in such a proportion that the molar ratio, (B)/(A), is in the range of 2 to 500 (in terms of metallic element). The ethylene polymer is a homo- or copolymer of ethylene wherein (a) Mw/Mn ranges from 1.5 to 4 and Mw is 3,000 to 1,000,000; (b) the relationship of W -24.9+2470/T holds between the half-value width (W) of the main peak and the temperature (T) in the compositional distribution curve; (c) the energy of activation of melt flow ranges from 7.5 to 20 kcal/mol; and (d) the density ranges from 0.85 to 0.97 g/cm3.
Inventors:
TAZAKI TOSHINORI (JP)
MACHIDA SHUJI (JP)
KAWASAKI NOBUO (JP)
YABUNOUCHI NOBUHIRO (JP)
KADOI YASUNORI (JP)
TAKEUCHI MIZUTOMO (JP)
NAKACHO KENJI (JP)
SHIKUMA HARUO (JP)
TANI NORIYUKI (JP)
MACHIDA SHUJI (JP)
KAWASAKI NOBUO (JP)
YABUNOUCHI NOBUHIRO (JP)
KADOI YASUNORI (JP)
TAKEUCHI MIZUTOMO (JP)
NAKACHO KENJI (JP)
SHIKUMA HARUO (JP)
TANI NORIYUKI (JP)
Application Number:
PCT/JP1994/002251
Publication Date:
July 06, 1995
Filing Date:
December 27, 1994
Export Citation:
Assignee:
IDEMITSU KOSAN CO (JP)
TAZAKI TOSHINORI (JP)
MACHIDA SHUJI (JP)
KAWASAKI NOBUO (JP)
YABUNOUCHI NOBUHIRO (JP)
KADOI YASUNORI (JP)
TAKEUCHI MIZUTOMO (JP)
NAKACHO KENJI (JP)
SHIKUMA HARUO (JP)
TANI NORIYUKI (JP)
TAZAKI TOSHINORI (JP)
MACHIDA SHUJI (JP)
KAWASAKI NOBUO (JP)
YABUNOUCHI NOBUHIRO (JP)
KADOI YASUNORI (JP)
TAKEUCHI MIZUTOMO (JP)
NAKACHO KENJI (JP)
SHIKUMA HARUO (JP)
TANI NORIYUKI (JP)
International Classes:
C08F4/64; C08F4/642; C08F10/00; C08F10/02; C08F4/6392; C08F4/659; C08F4/6592; C08F110/02; C08F210/02; C08F210/16; C08F210/18; (IPC1-7): C08F4/642; C08F10/00
Foreign References:
| JPH02503687A | 1990-11-01 | |||
| JPS60252607A | 1985-12-13 | |||
| JPS60245604A | 1985-12-05 | |||
| JPS6035007A | 1985-02-22 |
Other References:
See also references of EP 0737694A4
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