EP0376084A2
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EP
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Process for producing highly stereospecific alpha-olefin polymers
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1989-12-14
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Granted: —
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Expires: 2009-12-14
Abstract
Abstract A process for producing a highly stereospecific α-olefin polymer which comprises homopolymerizing or copolymerizing an α-olefin or copolymerizing an α-olefin with ethylene by the use of a catalyst system comprising: (A) a solid catalyst component containing a trivalent titanium compound obtained by reducing a titanium compound represented by the following general formula: Ti(OR¹) n x 4-n (R¹ represents a hydrocarbon group having 1 to 20 carbon atoms, X represents a halogen atom and n represents a number satisfying 0 < n ≦ 4) with an organomagnesium compound in the presence of an organic silicon compound having Si-O bonds to obtain a solid product, followed by treating the solid product with an ester compound and thereafter treating the ester-treated solid product with a mixture of an ether compound and titanium tetrachloride or a mixture of an ether compound, titanium tetrachloride and an ester compound, (B) an organoaluminum compound, and (C) a silicon compound represented by the following general formula: R²R³Si(OR⁴)₂ (R² represents an alicyclic hydrocarbon group having 5 to 20 carbon atoms, R³ represents an acyclic hydrocarbon group having 2 to 12 carbon atoms, and R⁴ represents a hydrocarbon group having 1 to 20 carbon atoms).
Inventors
- 👤 Takeshi Ebara
- 👤 Toshio Sasaki
- 👤 Kiyoshi Kawai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 07:09
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
183 words
A catalyst system for homopolymerization or copolymerization of an α-olefin, or copolymerization of an α-olefin with ethylene comprising: (A) a solid catalyst component containing a trivalent titanium compound obtained by reducing a titanium compound represented by the following general formula: Ti(OR¹) n x 4-n (R¹ represents a hydrocarbon group having 1 to 20 carbon atoms, X represents a halogen atom and n represents a number satisfying 0 < n ≦ 4) with an organomagnesium compound in the presence of an organic silicon compound having Si-O bonds to obtain a solid product, followed by treating the solid product with an ester compound and thereafter treating the ester-treated solid product with a mixture of an ether compound and titanium tetrachloride or a mixture of an ether compound, titanium tetrachloride and an ester compound, (B) an organoaluminum compound, and (C) a silicon compound represented by the following general formula: R²R³Si(OR⁴)₂ (R² represents an alicyclic hydrocarbon group having 5 to 20 carbon atoms, R³ represents an acyclic hydrocarbon group having 2 to 12 carbon atoms, and R⁴ represents a hydrocarbon group having 1 to 20 carbon atoms).
Claim 2
Dependent Claim
183 words
A catalyst system for homopolymerization or copolymerization of an α-olefin, or copolymerization of an α-olefin with ethylene comprising: (A) a solid catalyst component containing a trivalent titanium compound obtained by reducing a titanium compound represented by the following general formula: Ti(OR¹) n x 4-n (R¹ represents a hydrocarbon group having 1 to 20 carbon atoms, X represents a halogen atom and n represents a number satisfying 0 < n ≦ 4) with an organomagnesium compound in the presence of an organic silicon compound having Si-O bonds to obtain a solid product, followed by treating the solid product with an ester compound and thereafter treating the ester-treated solid product with a mixture of an ether compound and titanium tetrachloride or a mixture of an ether compound, titanium tetrachloride and an ester compound, (B) an organoaluminum compound, and (C) a silicon compound represented by the following general formula: R²R³Si(OR⁴)₂ (R² represents an alicyclic hydrocarbon group having 5 to 20 carbon atoms, R³ represents an acyclic hydrocarbon group having 2 to 12 carbon atoms, and R⁴ represents a hydrocarbon group having 1 to 20 carbon atoms).
Claim 3
Dependent Claim
62 words
A catalyst system according to Claim 1, wherein the hydrocarbon group having 1 to 20 carbon atoms is an alkyl group having 2 to 18 carbon atoms or aryl group having 6 to 18 carbon atoms, the halogen atom is chlorine, bromine or iodine, and n is a number satisfying 2 ≦ n ≦ 4 in the general formula of titanium compound.
Claim 4
Dependent Claim
94 words
A catalyst system according to Claim 1 or 2, wherein the organic silicon compound having Si-O bond is one represented by the general formulas: Si(OR⁵) m R⁶ 4-m R⁷(R⁸₂SiO) p SiR⁹₃ or (R¹⁰₂SiO) q where R⁵ represents a hydrocarbon group having 1 to 20 carbon atoms, R⁶, R⁷, R⁸, R⁹ and R¹⁰ each represents a hydrocarbon group having 1 to 20 carbon atoms or a hydrogen atom, m represents a number satisfying 0 < m ≦ 4, p represents an integer of 1 to 1,000, and q represents an integer of 2 to 1,000.
Claim 5
Dependent Claim
39 words
A catalyst system according to Claim 3, wherein the organic silicon compound is one represented by the general formula Si(OR⁵ )m R⁶ 4-m where R⁵ and R⁶ are as defined above and m satisfies 1 ≦ m ≦ 4.
Claim 6
Dependent Claim
70 words
A catalyst system according to any one of Claims 1 to 4, wherein the organomagnesium compound is a Grignard compound represented by the general formula R¹¹MgX (R¹¹ represents a hydrocarbon group having 1 to 20 carbon atoms and X represents a halogen atom), or a dialkylmagnesium compound or diarylmagnesium compound represented by general formula R¹²R¹³Mg and (R¹² and R¹³ each represents a hydrocarbon group having 1 to 20 carbon atoms).
Claim 7
Dependent Claim
25 words
A catalyst system according to Claim 5, wherein the Grignard compound is one represented by the general formula R¹¹MgCl, where R¹¹ is as defined above.
Claim 8
Dependent Claim
31 words
A catalyst system according to any one of Claims 1 to 6, wherein the ester compound is an aliphatic carboxylic ester, olefinic carboxylic ester, alicyclic carboxylic ester or aromatic carboxylic ester.
Claim 9
Dependent Claim
20 words
A catalyst system according to Claim 7, wherein the ester compound is a methacrylic ester, maleic ester or phthalic ester.
Claim 10
Dependent Claim
20 words
A catalyst system according to any one of Claims 1 to 8, wherein the ether compound is a dialkyl ether.
Claim 11
Dependent Claim
17 words
A catalyst system according to Claim 9, wherein the dialkyl ether is dibutyl ether or diisoamyl ether.
Claim 12
Dependent Claim
68 words
A catalyst system according to any one of Claims 1 to 10, wherein the organoaluminum compound is one represented by the general formulas R¹⁴ r AlY 3-r , or R¹⁵R¹⁶Al-O-AlR¹⁷R¹⁸ wherein R¹⁴, R¹⁵, R¹⁶, R¹⁷ and each represent a hydrocarbon group having 1 to 20 carbon atoms, Y represents halogen atom, a hydrogen atom or alkoxy group, and r represents a number satisfying 2 ≦ r ≦ 3.
Claim 13
Dependent Claim
25 words
A catalyst system according to any one of Claims 1 to 11, wherein the silicon compound (component C) represented by the general formula, R²R³Si(OR⁴)₂, is
Claim 14
Dependent Claim
29 words
A catalyst system according to any one of Claims 1 to 12, wherein the reduction of the titanium compound is carried out in the presence of a porous material.
Claim 15
Dependent Claim
47 words
A catalyst system according to Claim 13, wherein the porous material is an inorganic oxide or organic polyymer having a pore volume of 0.3 ml/g or above in the pore radius region of 200 to 2,000 Å and a mean particle diameter of 5 to 300 microns.
Claim 16
Dependent Claim
22 words
A catalyst system according to Claim 14, wherein the porous inorganic oxide is SiO₂, Al₂O₃, MgO, TiO₂, ZrO₂, SiO·Al₂O₃, MgO·Al₂O₃, or MgO·SiO₂·Al₂O₃.
Claim 17
Dependent Claim
31 words
A catalyst system according to Claim 14, wherein porous organic polymer is a polystyrene type, polyacrylic ester type, polymethacrylic ester type, polyacrylonitrile type, polyvinyl chloride type or polyolefin type polymer .
Claim 18
Dependent Claim
48 words
A catalyst system according to any one of Claims 1 to 16, wherein the organomagnesium compound is used in an amount of 0.1 to 1.0 as expressed in terms of the atomic ratio of the sum of the titanium atoms and silicon atoms to the magnesium atoms [(Ti+Si)/Mg].
Claim 19
Dependent Claim
41 words
A catalyst system according to any one of Claims 1 to 17, wherein the organic silicon compound is used in an amount of 1 to 50 as expressed in terms of the atomic ratio of the silicon atoms to titanium atoms(Si/Ti).
Claim 20
Dependent Claim
41 words
A catalyst system according to any one of Claims 1 to 18, wherein the ester compound for treating the solid product is used in an amount of 0.1 to 50 moles per one mole of titanium atoms in the solid product.
Claim 21
Dependent Claim
41 words
A catalyst system according to any one of Claims 1 to 19, wherein the ester compound for treating the solid product is used in an amount of 0.01 to 1.0 mole per one mole of magnesium atoms in the solid product.
Claim 22
Dependent Claim
37 words
A catalyst system according to any one of Claims 1 to 20, wherein the ether compound is used in an amount of 0.1 to 100 moles per one mole of titanium atoms present in the solid product.
Claim 23
Dependent Claim
37 words
A catalyst system according to any one of Claims 1 to 21, wherein the titanium tetrachloride is added in an amount of 1 to 1,000 moles per one mole of titanium atoms present in the solid product.
Claim 24
Dependent Claim
43 words
A catalyst system according to any one of Claims 1 to 22, wherein the ester compound for treating the ester-treated solid product is used in an amount of 30 moles or less per one mole of titanium atoms present in the solid product.
Claim 25
Dependent Claim
38 words
A catalyst system according to any one of Claims 1 to 23, wherein the organoaluminum compound is used in an amount of 1 to 1,000 moles per one moles of titanium atoms present in the solid catalyst component.
Claim 26
Dependent Claim
57 words
A process for producing a highly stereospecific α-olefin polymer which comprises homopolymerizing or copolymerizing an α-olefin or copolymerizing an α-olefin with ethylene by the use of a catalyst system according to any one of Claims 1 to 24 at a temperature ranging from -30° to 300°C and at a pressure of about 3 to about 2,000 atmosphere.
Claim 27
Dependent Claim
20 words
A process according to Claim 25, wherein the α-olefin is propylene, butene-1, pentene-1, hexene-1, 3-methyl-pentene-1, 4-methyl-pentene-1, octene-1, decene-1 or dodecene-1.
References Cited (Backward Citations)
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