US5498770A
Expired / Lapsed
US
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Catalyst for the polymerization of olefins and process for the polymerization of olefins
Assignee: Toho Titanium Co Ltd
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Filing: 1994-09-20
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Granted: 1996-03-12
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Expires: 2014-09-20
Abstract
Abstract A catalyst for the polymerization of olefins comprising (A) a solid catalyst component essentially containing magnesium, titanium, an electron donor compound, and a halogen which is prepared by contacting a magnesium compound, a titanium halide compound, and an electron donor compound, (B) an organoaluminum compound, and (C) an organosilicon compound and a process for polymerizing an olefin using the same are disclosed, the organosilicon compound (C) being represented by formula (I): ##STR1## wherein R 1 and R 2 , which may be the same or different, each represents an alkyl group having from 1 to 3 carbon atoms; R 3 and R 4 , which may be the same or different, each represents an alkyl group having from 1 to 3 carbon atoms, or a halogen atom; and m and n each represents 0 or an integer of 1 or 2. A polyolefin having high stereoregularity and broad molecular weight distribution can be obtained in high yield.
Inventors
- 👤 Motoki Hosaka
- 👤 Kenji Goto
- 👤 Masahiko Matsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:08
CPC Classifications
C; C08; C08F; C08F10/00; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C08F110/00; C08F110/04; C08F110/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
127 words
A catalyst for the polymerization of olefins comprising (A) a solid catalyst comprising magnesium, titanium, an electron donor compound, and a halogen which is prepared by bringing metallic magnesium or a magnesium compound, a titanium halide compound, and an electron donor compound into contact, (B) an organoaluminum compound, and (C) an organosilicon compound represented by formula (I): ##STR4## wherein R 1 and R 2 , which may be the same or different, each represents an alkyl group having from 1 to 3 carbon atoms; R 3 and R 4 , which may be the same or different, each represents an alkyl group having from 1 to 3 carbon atoms, or a halogen atom; and m and n each represents 0 or an integer of 1 or 2.
Claim 2
Dependent Claim
127 words
A catalyst for the polymerization of olefins comprising (A) a solid catalyst comprising magnesium, titanium, an electron donor compound, and a halogen which is prepared by bringing metallic magnesium or a magnesium compound, a titanium halide compound, and an electron donor compound into contact, (B) an organoaluminum compound, and (C) an organosilicon compound represented by formula (I): ##STR4## wherein R 1 and R 2 , which may be the same or different, each represents an alkyl group having from 1 to 3 carbon atoms; R 3 and R 4 , which may be the same or different, each represents an alkyl group having from 1 to 3 carbon atoms, or a halogen atom; and m and n each represents 0 or an integer of 1 or 2.
Claim 3
Dependent Claim
27 words
The catalyst for the polymerization of olefins as claimed in claim 1, wherein said magnesium compound used in preparation of solid catalyst component (A) is a dialkoxymagnesium.
Claim 4
Dependent Claim
26 words
The catalyst for the polymerization of olefins as claimed in claim 1, wherein said magnesium compound used in preparation of solid catalyst component (A) is diethoxymagnesium.
Claim 5
Dependent Claim
32 words
The catalyst for the polymerization of olefins as claimed in claim 1, wherein said magnesium compound used in preparation of solid catalyst component (A) is diethoxymagnesium in the form of spherical particles.
Claim 6
Dependent Claim
80 words
The catalyst for the polymerization of olefins as claimed in claim 1, wherein said titanium halide compound used in preparation of solid catalyst component (A) is a titanium halide or alkoxytitanium halide, represented by formula Ti(OR 5 ) n X 4-n , wherein R 5 represents an alkyl group having from 1 to 4 carbon atoms, X represents a chlorine atom, a bromide atom or an iodine atom, and n is 0 or an integer of 1, 2 or 3.
Claim 7
Dependent Claim
45 words
The catalyst for the polymerization of olefins as claimed in claim 1, wherein said electron donor compound used in preparation of solid catalyst component (A) is a diester of phthalic acid, the ester moieties thereof being an alkyl group having 1 to 10 carbon atoms.
Claim 8
Dependent Claim
65 words
The catalyst for the polymerization of olefins as claimed in claim 1, wherein said organoaluminium compound (B) is represented by formula R 7 yAlY 3-y , wherein R 7 represents an alkyl group having from 1 to 4 carbon atoms, Y represents a hydrogen atom, a chlorine atom, a bromine atom, or an iodine atom, and y represents an integer of 1, 2 or 3.
Claim 9
Dependent Claim
34 words
The catalyst for the polymerization of olefins as claimed in claim 1, wherein said organosilicon compound (C) is at least one compound selected from the group consisting of cyclohexylcyclopentyldimethoxysilane, cyclohexylcyclopentyldiethoxysilane, 3-methylcyclohexylcyclopentyldimethoxysilane, 4-methylcyclohexylcyclopentyldimethoxysilane and 3,5-dimethylcyclohexylcyclopentyldimethoxysilane.
Claim 10
Dependent Claim
49 words
The catalyst as claimed in claim 1, wherein said component (A) solid catalyst consists essentially of magnesium, titanium, and electron donor compound and a halogen, which solid catalyst is prepared by bringing metallic magnesium or a magnesium compound, a titanium halide compound and an electron donor compound into contact.
References Cited (Backward Citations)
US4816433A
Cited
US5354820A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1999-03-12 | 1999-09-11 | 2000-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-12 | 2003-09-11 | 2004-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-12 | 2007-09-11 | 2008-03-12 | $7700.00 | Window Closed / Lapsed |