Claims
- 1. A method of olefin polymerization comprising:
- main polymerizing .alpha.-olefin in the presence of an olefin polymerization catalyst which comprises
- (Ib-IIa-IIIa) a prepolymerized olefin-containing catalyst,
- (IIa) an organoaluminum compound catalyst component, and
- (IIIb) an electron donor which is a compound having at least two ether linkages represented by the following formula (A) ##STR11## wherein n is a integer and 2.ltoreq.n.ltoreq.10,
- R.sup.1 -R.sup.26 are each a substituent having at least one element selected from the group consisting of carbon, hydrogen, oxygen, halogen, nitrogen, sulfur, phosphorus, boron and silicon, any two members of R.sup.1 -R.sup.26 may together from a ring other than a benzene ring and the main chain of the compound may contain an atom other than carbon;
- wherein said prepolymerized olefin-containing catalyst (Ib-IIa-IIIa) comprises
- (Ib) a solid titanium catalyst component containing titanium, magnesium, halogen and an electron donor other than a compound having at least two ether linkages represented by said formula (A),
- (IIa) an organoaluminum compound catalyst component,
- (IIIa) a compound having at least two ether linkages represented by said formula (A), and
- polyolefin prepared by preliminary polymerizing .alpha.-olefin of 2 to 20 carbon atoms; and
- wherein said prepolymerized olefin-containing catalyst (Ib-IIa-IIIa) is prepared in a hydrocarbon solvent and then separated therefrom prior to utilization in said main polymerization.
- 2. The method of olefin polymerization as claimed in claim 1, wherein subsequent to separation from said hydrocarbon solvent, said prepolymerized olefin-containing catalyst (Ib-IIa-IIIa) is suspended in a hydrocarbon solvent and then separated therefrom prior to utilization in said main polymerization.
- 3. A method of olefin polymerization comprising:
- main polymerizing .alpha.-olefin in the presence of an olefin polymerization catalyst which comprises
- (Ib-IIa-IIIa) a prepolymerized olefin-containing catalyst,
- (IIa) an organoaluminum compound catalyst compound,
- (IIIb) an electron donor which is a compound represented by the following formula (B)
- R.sub.n Si(OR.sup.1).sub.4-n (B)
- wherein
- R and R.sup.1 are each a hydrocarbon radical and
- O.ltoreq.n.ltoreq.4;
- wherein said prepolymerized olefin-containing catalyst (Ib-IIa-IIIa) comprises
- (Ib) a solid titanium catalyst component containing titanium, magnesium, halogen and an electron donor other than a compound having at least two ether linkages represented by the following formula (A) ##STR12## wherein n is an integer and 2.ltoreq.n.ltoreq.10,
- R.sup.1 -R.sup.26 are each a substituent having at least one element selected from the group consisting of carbon, hydrogen, oxygen, halogen, nitrogen, sulfur, phosphorus, boron and silicon, any two members of R.sup.1 -R.sup.26 may together form a ring other than a benzene ring and the main chain of the compound may contain an atom other than carbon,
- (IIa) an organoaluminum compound catalyst component,
- (IIIa) a compound having at least two ether linkages represented by said formula (A), and
- polyolefin prepared by preliminary polymerizing .alpha.-olefin of 2-20 carbon atoms; and
- wherein said prepolymerized olefin-containing catalyst (Ib-IIa-IIIa) is prepared in a hydrocarbon solvent and then separated therefrom prior to utilization in said main polymerization.
- 4. The method of olefin polymerization as claimed in claim 3, wherein subsequent to separation from said hydrocarbon solvent, said prepolymerized olefin-containing solvent, said prepolymerized olefin-containing catalyst (Ib-IIa-IIIa) is suspended in a hydrocarbon solvent and then separated therefrom prior to utilization in said main polymerization.
Priority Claims (4)
Number |
Date |
Country |
Kind |
2-97902 |
Apr 1990 |
JPX |
|
2-97906 |
Apr 1990 |
JPX |
|
2-97910 |
Apr 1990 |
JPX |
|
2-97911 |
Apr 1990 |
JPX |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a division of application Ser. No. 08/772,885, filed Dec. 24, 1996 now U.S. Pat. No. 5,726,262; which is a continuation of application Ser. No. 08/369,288, filed Jan. 6, 1995 now abandoned; which is a continuation of application Ser. No. 08/104,494, filed Aug. 10, 1993 now abandoned; which is a continuation-in-part of application Ser. No. 07/684,256, filed Apr. 12, 1991 now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4978648 |
Barbe et al. |
Dec 1990 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
772885 |
Dec 1996 |
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Continuations (2)
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Number |
Date |
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Parent |
369288 |
Jan 1995 |
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Parent |
104494 |
Aug 1993 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
684256 |
Apr 1991 |
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