Claims
- 1. An ethylene polymer having the following properties:
- (i) a density in the range of from 0.90 to 0.98 g/cm.sup.3,
- (ii) a melt flow rate, as measured at 190.degree. C. under a load of 2.16 kg, in the range of 0.001 to 3,000 g/10 min,
- (iii) a melt tension (MT) and melt flow rate (MFR) which satisfy the relationship represented by the formula:
- log MT .gtoreq.-0.41 log MFR+0.75,
- (iv) a molecular weight distribution Mw/Mn in the range of 2 to 9,
- (v) a molecular weight distribution Mz/Mw in the range of 2 to 5,
- (vi) a g* value, which is an index of a proportion of long-chain branches, in the range of 0.95 to 1.00, and
- (vii) a swell ratio of from 1.35 to 1.50.
- 2. The ethylene polymer as in claim 1, prepared by a process comprising polymerizinc ethylene in the presence of an ethylene polymerization catalyst comprising:
- (I) a solid titanium catalyst component obtained by the contact of oxygen with a solid titanium organometallic compound complex which is obtained by the contact with each other of
- (A) a solid titanium composite which is obtained by the contact with each other of
- (a) a solid magnesium aluminum composite containing magnesium, halogen and aluminum, and an alkoxy group having 6 or more carbon atoms and/or alcohol having 6 or more carbon atoms,
- said solid magnesium aluminum composite (a) being obtained by the contact with each other of
- (a-1) a magnesium solution formed from a halogen-containing magnesium compound, alcohol having 6 ore more carbon atoms and a hydrocarbon solvent, and
- (a-2) an organoaluminum compound, and
- (b) a tetravalent titanium compound,
- wherein the titanium in said solid titanium composite (A) has a valence of 4, and a molar ratio of the alkoxy group having 6 or more carbon atoms and/or alcohol having 6 or more carbon atoms to the titanium is in the range of 0.26 to 6.0, and and
- (B) an organometallic compound containing a metal selected from Group I to Group III of the periodic table; and
- (II) an organometallic compound catalyst component containing a metal selected from Group I to Group III of the periodic table.
- 3. The ethylene polymer as in claim 1, wherein the ethylene polymer is a homopolymer of ethylene, a random copolymer of ethylene and an olefin, or a block copolymer of ethylene and an olefin.
- 4. The ethylene polymer as in claim 1, wherein in (iv) the molecular weight distribution Mw/Mn is in the range of 2 to 7.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-032178 |
Mar 1994 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/394,627 filed on Feb. 27, 1995, now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (16)
Number |
Date |
Country |
0016707 |
Oct 1980 |
EPX |
0102895 |
Mar 1984 |
EPX |
0164215 |
Dec 1985 |
EPX |
0452920 |
Oct 1991 |
EPX |
0494084 |
Jul 1992 |
EPX |
1800695 |
Apr 1969 |
DEX |
3443087 |
May 1986 |
DEX |
55-012735 |
Jan 1980 |
JPX |
57-158204 |
Sep 1982 |
JPX |
59-089341 |
May 1984 |
JPX |
59-164347 |
Sep 1984 |
JPX |
60-036546 |
Feb 1985 |
JPX |
60-106806 |
Jun 1985 |
JPX |
61-130314 |
Jun 1986 |
JPX |
4-218507 |
Aug 1992 |
JPX |
1233599 |
May 1971 |
GBX |
Non-Patent Literature Citations (1)
Entry |
"Control of Molecular-Weight Distribution in Polyolefins Synthesized with Ziegler-Natta Catalytic System", Zucchini et al., Advanced Polymre Science, vol. 51, Ind. Div., pp. 101-153, 1983. |
Continuations (1)
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Number |
Date |
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Parent |
394627 |
Feb 1995 |
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