EP0385765A2
Expired / Lapsed
EP
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Process for polymerizing olefins and catalyst for polymerizing olefins
Assignee: Mitsui Chemicals Inc
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Filing: 1990-02-28
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Granted: —
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Expires: 2010-02-28
Abstract
Abstract A catalyst for polymerization of an olefin, said catalyst being formed from [A] a solid titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredients, [B] an organoaluminum compound catalyst component, and [C] an electron donor catalyst component comprising at least two electron donors including an electron donor (1) and an electron donor (2), the MFR (a) of homopolypropylene obtained by using the electron donor (1) together with the solid titanium catalyst component [A] and the organoaluminum compound catalyst component [B] has the following relation to the MFR (b) of homopolypropylene obtained by using the electron donor (2) under the same polymerization conditions as in the case of using the electron donor (1) log [MFR (b)/MFR (a)]≧1.5. This catalyst can give an olefin polymer having a broad molecular weight. Also provided is a process for polymerizing or copolymerizing an olefin in the presence of the above catalyst.
Inventors
- 👤 Naoshi C/O Mitsui Petrochem. Ind. Ltd. Ishimaru
- 👤 Mamoru C/O Mitsui Petrochem. Ind. Ltd. Kioka
- 👤 Akinori C/O Mitsui Petrochem. Ind. Ltd. Toyota
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 17:26
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/42; C08F4/44; C08F4/46; C08F297/00; C08F297/06; C08F297/08; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/904
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
128 words
A catalyst for use in the polymerisation of an olefin, which catalyst is formed from [A] a solid titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredients, [B] an organoaluminum compound catalyst component, and [C] an electron donor catalyst component comprising at least two electron donors including an electron donor (1) and an electron donor (2), the MFR (a) of homopolypropylene obtained by polymerising propylene in the presence of a catalyst formed of the solid titanium catalyst component, [A], the organoaluminum compound catalyst component [B] and the electron donor (1) and the MFR (b) of homopolypropylene obtained under the same polymerisation conditions except for using the electron donor (2) in place of the electron donor (1) satisfying the relationship: log [MFR (b)/MFR (a)]≧1.5.
Claim 2
Dependent Claim
128 words
A catalyst for use in the polymerisation of an olefin, which catalyst is formed from [A] a solid titanium catalyst component comprising magnesium, titanium, halogen and an electron donor as essential ingredients, [B] an organoaluminum compound catalyst component, and [C] an electron donor catalyst component comprising at least two electron donors including an electron donor (1) and an electron donor (2), the MFR (a) of homopolypropylene obtained by polymerising propylene in the presence of a catalyst formed of the solid titanium catalyst component, [A], the organoaluminum compound catalyst component [B] and the electron donor (1) and the MFR (b) of homopolypropylene obtained under the same polymerisation conditions except for using the electron donor (2) in place of the electron donor (1) satisfying the relationship: log [MFR (b)/MFR (a)]≧1.5.
Claim 3
Dependent Claim
48 words
A catalyst according to claim 1 in which the solid titanium catalyst component [A] contains an ester as the electron donor; the organoaluminum compound catalyst component [B] is a trialkyl aluminum and at least two electron donors of the electron donor catalyst component [C] are organic silane compounds.
Claim 4
Dependent Claim
45 words
A catalyst according to claim 2 in which the solid titanium catalyst component [A] contains diisobutyl phthalate as the electron donor; the organoaluminum compound catalyst component [B] is triethyl aluminum; and two electron donors of the electron donor catalyst component [C] are dicyclopentyldimethoxysilane and propyltriethoxysilane.
Claim 5
Dependent Claim
45 words
A catalyst according to claim 2 in which the solid titanium catalyst component [A] contains diisobutyl phthalate as the electron donor; the organoaluminum compound catalyst component [B] is triethyl aluminum; and two electron donors of the electron donor catalyst component [C] are dicyclopentyldimethoxysilane and vinyltriethoxysilane.
Claim 6
Dependent Claim
45 words
A catalyst according to claim 2 in which the solid titanium catalyst component [A] contains diisobutyl phthalate as the electron donor; the organoaluminum compound catalyst component [B] is triethyl aluminum; and two electron donors of the electron donor catalyst component [C] are dicyclopentyldimethoxysilane and beta-phenethylmethyldiethoxysilane.
Claim 7
Dependent Claim
45 words
A catalyst according to claim 2 in which the solid titanium catalyst component [A] contains diisobutyl phthalate as the electron donor; the organoaluminum compound catalyst component [B] is triethyl aluminum; and two electron donors of the electron donor catalyst component [C] are di-t-butyldimethoxysilane and propyltriethoxysilane.
Claim 8
Dependent Claim
29 words
A catalyst according to any one of the preceding claims in which the solid titanium catalyst component [A] has been treated by preliminarily polymerizing an olefin in its presence.
Claim 9
Dependent Claim
19 words
A catalyst according to claim 7 in which the olefin is an olefin having 2 to 5 carbon atoms.
Claim 10
Dependent Claim
12 words
A catalyst according to claim 8 in which the olefin is propylene.
Claim 11
Dependent Claim
29 words
A process for preparing an olefin polymer which comprises polymerising at least one olefin in the presence of a catalyst as claimed in any one of the preceding claims.
Claim 12
Dependent Claim
18 words
A process according to claim 10 wherein the at least one olefin has 2 to 5 carbon atoms.
Claim 13
Dependent Claim
14 words
A process according to claim 10 wherein the at least one olefin is propylene.
References Cited (Backward Citations)
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