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EP0523879A2
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Olefin polymerization catalyst
Assignee: Mitsubishi Chemical Corp
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Filing: 1992-06-29
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Granted: —
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Expires: 2012-06-29
Abstract
Abstract An olefin polymerization catalyst which is obtained by contacting the following components (A) and (B): component (A): a product of contacting the following components (A1) and (A2): component (A1): polyolefin powder having specific values of pore diameter, pore volume, average pore diameter and average particle diameter, component (A2): a solid component for a Ziegler catalyst comprising titanium, magnesium and a halogen as the essential components; component (B): an organoaluminum compound. The supporting state of the catalyst is improved, and a contaminant-free polymer having a satisfactorily large particle diameter without the lowering of the activity or the stereoregularity of the catalyst is successfully obtained.
Inventors
- 👤 Takashi C/O Mitsubishi Petrochem.Com.Ltd. Fujita
- 👤 Kazuyo Mitsubishi Petrochem.Com.Ltd. Kitagawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 12:29
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/06; C08F297/08; C08F297/083; C08F297/086; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/904
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
121 words
An olefin polymerization catalyst which is obtained by contacting the following components (A) and (B): component (A) : a product of contacting the following components (A₁) and (A₂): component (A₁): polyolefin powder having a pore diameter distribution in the range of 75 to 10,000 Å , a pore volume in the range of 0.1 to 3.0 cc/g, an average pore diameter in the range of 300 to 5,000 Å as measured with a porosimeter and an average particle diameter in the range of 50 to 1,000 µm, and being completely soluble in toluene at 70°C, component (A₂): a solid component for a Ziegler type catalyst containing titanium, magnesium and a halogen as the essential components; component (B) : an organoaluminum compound.
Claim 2
Dependent Claim
79 words
The olefin polymerization catalyst as claimed in claim 1, wherein the polyolefin powder in the component (A₁) satisfies at least one of the following conditions: (a) a pore diameter distribution in the range of 100 to 5,000 Å , (b) a pore volume in the range of 0.5 to 2.5 cc/g, (c) an average pore diameter in the range of 500 to 3,000 Å , and (d) an average particle diameter in the range of 100 to 700 µm.
Claim 3
Dependent Claim
32 words
The olefin polymerization catalyst as claimed in claim 2, wherein the polyolefin powder in the component (A₁) is a powder of a polymer of an α-olefin having 2 to 10 carbon atoms.
Claim 4
Dependent Claim
19 words
The olefin polymerization catalyst as claimed in claim 3, wherein said α-olefin is a polymer of ethylene and/or propylene.
Claim 5
Dependent Claim
19 words
The olefin polymerization catalyst as claimed in claim 3, wherein said polymer of an α-olefin is a propylene homopolymer.
Claim 6
Dependent Claim
80 words
The olefin polymerization catalyst as claimed in claim 1, wherein the component (A₂) has titanium supplied by a titanium compound selected from the group consisting of the compounds represented by the formula Ti(OR¹) 4-n X n , wherein R¹ represents a hydrocarbyl group having 1 to 10 carbon atoms, X represents halogen and n denotes a numeral defined as 0 ≦ n ≦ 4, and molecular compounds obtained by reacting a TiX′₄, wherein X′ represents halogen, with an electron donor.
Claim 7
Dependent Claim
47 words
The olefin polymerization catalyst as claimed in claim 1, wherein the component (A₂) has magnesium supplied by a magnesium compound selected from the group consisting of a magnesium halide, a dialkoxymagnesium, an alkoxymagnesium halide, a magnesium oxyhalide, a dialkylmagnesium, magnesium oxide, magnesium hydroxide and a magnesium carbonate.
Claim 8
Dependent Claim
34 words
The olefin polymerization catalyst as claimed in claim 1, wherein the component (A₂) has halogen supplied by the halogen of the titanium supplying source compound and/or the magnesium supplying source compound which contain halogen.
Claim 9
Dependent Claim
101 words
The olefin polymerization catalyst as claimed in claim 1, wherein the component (A₂) consists essentially of the following components used in the preparation thereof: (i) a solid component for a Ziegler catalyst containing as its essential components titanium, magnesium and a halogen; (ii) a silicon compound of the formula R² p X q Si(OR³), wherein R² and R³ are each a hydrocarbyl group of 1 to 20 carbon atoms, X is a halogen atom, 0 ≦ p ≦ 3, 0 ≦ q ≦ 3 and 0 ≦ p + q ≦ 3; (iii) a vinylsilane compound; and (iv) an organoaluminum compound.
Claim 10
Dependent Claim
108 words
The olefin polymerization catalyst as claimed in claim 1, wherein the component (A₂) consists essentially of the following components used in the preparation thereof: (i) a solid component for a Ziegler catalyst containing as its essential components titanium, magnesium and a halogen; (ii) an electron donor; (iii) a silicon compound of the formula R² p X q Si(OR³) 4- p- q wherein R² and R³ are each a hydrocarbyl groups of 1 to 20 carbon atoms, X is a halogen atom, 0 ≦ p ≦ 3, 0 ≦ q ≦ 3 and 0 ≦ p + q ≦ 3; (iv) a vinylsilane compound; and (v) an organoaluminum compound.
Claim 11
Dependent Claim
28 words
The olefin polymerization catalyst as claimed in claim 9, wherein the electron donor is selected from the group consisting of an organic acid ester and an acid halide.
Claim 12
Dependent Claim
33 words
The olefin polymerization catalyst as claimed in claim 9, wherein the silicon compound contains a branched hydrocarbyl group R² of 3 to 20 carbon atoms, of which the α-carbon is secondary or tertiary.
Claim 13
Dependent Claim
46 words
The olefin polymerization catalyst as claimed in claim 9, wherein the vinylsilane compound is a compound having a structure wherein at least one of the hydrogen atoms is replaced by a vinyl group and some the remaining hydrogen atoms are replaced by halogen, alkoxy and/or aryl.
Claim 14
Dependent Claim
78 words
The olefin polymerization catalyst as claimed in claim 9, wherein the organoaluminum compound is represented by the formulae, R⁴ 3-s AlX s and/or R⁵ 3-t Al(OR⁶) t , wherein R⁴ and R⁵, each, represents a hydrocarbyl group of 1 to 20 carbon atoms or a hydrogen atom, R⁶ represents a hydrocarbyl group of 1 to 20 carbon atoms, s and t denotes a numeral defined as 0 ≦ s < 3 and 0 < t < 3, respectively.
Claim 15
Dependent Claim
82 words
The olefin polymerization catalyst as claimed in claim 9, wherein the organoaluminum compound of the component (B) is represented by the formulae, R⁴ 3-s AlX s and/or R⁵ 3-t Al(OR⁶) t , wherein R⁴ and R⁵, each, represents a hydrocarbyl group of 1 to 20 carbon atoms or a hydrogen atom, R⁶ represents a hydrocarbyl group of 1 to 20 carbon atoms, s and t denotes a numeral defined as 0 ≦ s < 3 and 0 < t < 3, respectively.
Claim 16
Dependent Claim
20 words
The olefin polymerization catalyst as claimed in claim 15, wherein the organoaluminum compound of the component (B) is a trialkylaluminum.
Claim 17
Dependent Claim
36 words
The olefin polymerization catalyst as claimed in claim 1, wherein the component (A₁) has undergone an extraction with a hydrocarbon solvent thereby to modify the surface of the particles of the powder to meet the requirements.
References Cited (Backward Citations)
No citation records indexed.
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