EP0441620A2
Expired / Lapsed
EP
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Production of alpha-olefin polymers
Assignee: Mitsubishi Chemical Corp
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Filing: 1991-02-06
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Granted: —
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Expires: 2011-02-06
Abstract
Abstract Ziegler polymerization of α-olefins is disclosed which is characterized by a solid catalyst component. The solid catalyst component, Component (A), comprises Sub-component (i) which is a solid catalyst component for Ziegler catalysts comprising Ti, Mg and a halogen; Sub-component (ii) which is a silicon compound having a plurality of a bond represented by a formula: Si-OR¹ R¹ m X n Si (OR²) 4-n-m wherein R¹ indicates a hydrocarbyl group of 1 to 8 carbon atoms, Sub-component (iii) which is a vinylsilane compound, and Sub-component (iii) which is an organometal compound of a metal of Groups I to IV of the Periodic Table. No need of an outside electron donor may be required, and the polymer produced is improved in its content of a "tacky" polymer.
Inventors
- 👤 Takashi C/O Mitsubishi Petrochemical Fujita
- 👤 Toshihiko C/O Mitsubishi Petrochemical Sugano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 06:08
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/904
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
95 words
A solid catalyst component for Ziegler catalysts obtained by contacting the following Sub-components (i) to (iv): Sub-component (i) which is a solid catalyst component for Ziegler catalysts comprising titanium, magnesium and a halogen as the essential components; Sub-component (ii) which is a silicon compound having a plurality of a bond represented by a formula Si-OR¹ wherein R¹ indicates a hydrocarbyl group of 1 to 8 carbon atoms, Sub-component (iii) which is a vinylsilane compound; and Sub-component (iv) which is an organometal compound of a metal of the Groups I to III of the Periodic Table.
Claim 2
Dependent Claim
23 words
The solid catalyst component as claimed in claim 1 wherein the solid catalyst component of Sub-component (i) has an electron donor incorporated therein.
Claim 3
Dependent Claim
184 words
The solid catalyst component as claimed in claim 1 wherein the Sub-component (i) is a product prepared by a method selected from the group of: (1) a method in which a solid product obtained by contacting a magnesium halide with a titanium tetraalkoxide and a polymeric silicon compound is contacted with a titanium halide compound and/or a silicon halide compound, the polymeric silicon compound represented by the formula wherein R is a hydrocarbyl group having about 1 to 10 carbon atoms, n is a polymerization degree such that the viscosity of the polymeric silicon compound may be 1 to 100 centistokes; (2) a method in which a magnesium compound is dissolved in a titanium tetraalkoxide and an electron donor, and the solid component precipitated from the solution upon addition thereto of a halogenating agent selected from the group of silicon halides, aluminum halides and halogen compounds of phosphorus or a titanium halide compound is contacted with a titanium compound; and (3) a method in which a magnesium dihalide and a titanium tetraalkoxide and/or a polymer thereof are contacted, and subsequently with the polymericsilicon compound.
Claim 4
Dependent Claim
20 words
The solid catalyst component as claimed in claim 1 wherein the organosilicon compound of Sub-component (ii) is a hydrocarbyl hydrocarbyloxysilane.
Claim 5
Dependent Claim
39 words
The solid catalyst component as claimed in claim 4, wherein the hydrocarbyl hydrocarbyloxysilane is such that the hydrocarbyl group in the hydrocarbyl hydrocarbyloxysilane has the alpha-carbon atom which is secondary or tertiary and has 3 to 20 carbon atoms.
Claim 6
Dependent Claim
19 words
The solid catalyst component as claimed in claim 1 wherein the vinylsilane compound of Sub-component (iii) is a vinylalkylsilane.
Claim 7
Dependent Claim
22 words
The solid catalyst component as claimed in claim 6 wherein the alkyl group in the vinylalkylsilane has 1 to 12 carbon atoms.
Claim 8
Dependent Claim
34 words
The solid catalyst component as claimed in claim 1 wherein the organometal compound of Sub-component (iv) is an organoaluminum compound selected from the group consisting of a trialkylaluminum, an alkylaluminum halide, and an alkylalumoxane.
Claim 9
Dependent Claim
56 words
The solid catalyst component as claimed in claim 1 wherein the Component (A) is contacted with an alpha-olefin in the presence or absence of an organoaluminum compound thereby to polymerize the alpha-olefin on the Component (A) in an amount of 0.01 to 100 times the weight of the Component (A) before the contact of the alpha-olefin.
Claim 10
Dependent Claim
25 words
A catalyst for polymerizing an alpha-olefin which comprise Component (A) as claimed in claim 1 and Component ( B ) which is an organoaluminum compound.
Claim 11
Dependent Claim
21 words
A process for polymerizing an alpha-olefin which comprises subjecting an alpha-olefin to contact with a catalyst as claimed in claim 10.
References Cited (Backward Citations)
No citation records indexed.
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