US5354820A
Expired / Lapsed
US
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Process for the preparation of olefin polymer
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1992-12-29
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Granted: 1994-10-11
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Expires: 2012-12-29
Abstract
Abstract This invention relates to a process of producing an olefin polymer having stereoregularity by polymerizing an olefin in the presence of a catalyst obtained from (A) a solid catalyst component obtained by reacting a dialkoxymagnesium represented by the general formula: Mg(OR 1 ) m X 1 2-m , wherein R 1 represents a cycloalkyl group, an aryl group, or an alkyl group having 1 to 10 carbon atoms, X 1 represents an halogen atom, and m is 1 to 2, an organic acid ester, a silicon compound represented by the general formula: Si(OR 2 ) n X 2 4-n , wherein R 2 represents an alkyl group, a cycloalkyl group, or an aryl group, X 2 represents a halogen atom such as chlorine and bromine, and n is a real number of 0 to 3.0, and an a titanium compound, (B) an organic aluminum compound, and (C) an electron donative compound, characterized in that, as a first step, said dialkoxymagnesium, an aromatic dicarboxylic acid ester, and said silicon compound are reacted, and then, as a second step, a solid product obtained by reacting the reaction product obtained in said first step with a titanium tetrahalide is used as said solid catalyst component (A).
Inventors
- 👤 Hideo Funabashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:30
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
139 words
A process of producing an olefin polymer having stereoregularity by polymerizing olefin monomers in the presence of a catalyst, said catalyst comprising: (A) a solid catalyst component, (B) a tri-C 1 -C 5 -alkylaluminum, and (C) an electron donative compound; wherein said solid catalyst component (A) is obtained by reacting, in a first step, (i) a dialkoxymagnesium compound of the formula Mg(OR 1 ) 2 wherein R 1 is an alkyl group having 1 to 4 carbon atoms with (ii) a phthalate diester in an amount of from 0.01 to 1 moles of said diester per mole of said dialkoxymagnesium compound and (iii) tetrachlorosilane in an amount of 0.01 to 5 moles per mole of a said dialkoxymagnesium compound, to form a solid reaction product; and then reacting, in a second step, the solid reaction product with titanium tetrachloride.
Claim 2
Dependent Claim
139 words
A process of producing an olefin polymer having stereoregularity by polymerizing olefin monomers in the presence of a catalyst, said catalyst comprising: (A) a solid catalyst component, (B) a tri-C 1 -C 5 -alkylaluminum, and (C) an electron donative compound; wherein said solid catalyst component (A) is obtained by reacting, in a first step, (i) a dialkoxymagnesium compound of the formula Mg(OR 1 ) 2 wherein R 1 is an alkyl group having 1 to 4 carbon atoms with (ii) a phthalate diester in an amount of from 0.01 to 1 moles of said diester per mole of said dialkoxymagnesium compound and (iii) tetrachlorosilane in an amount of 0.01 to 5 moles per mole of a said dialkoxymagnesium compound, to form a solid reaction product; and then reacting, in a second step, the solid reaction product with titanium tetrachloride.
Claim 3
Dependent Claim
48 words
A process of producing an olefin polymer as claimed in claim 1, wherein the monomers are represented by the general formula: R 3 --CH═CH 2 wherein R 3 is selected from the group consisting of a hydrogen atom, and an alkyl group having 1 to 6 carbon atoms.
Claim 4
Dependent Claim
28 words
A process of producing an olefin polymer as claimed in claim 1, wherein the olefin monomers are selected from the group consisting of ethylene, propylene and mixtures thereof.
Claim 5
Dependent Claim
19 words
A process of producing an olefin polymer as claimed in claim 1, wherein the phthalate diester is dibutyl phthalate.
Claim 6
Dependent Claim
189 words
A process of producing an olefin polymer having stereoregularity by polymerizing olefin monomers in the presence of a catalyst, said catalyst comprising: (A) a solid catalyst component, (B) a tri-C 1 -C 5 -alkylaluminum, and (C) an electron donative compound; wherein said solid catalyst component (A) is obtained by reacting, in a first step, (i) a dialkoxymagnesium compound of the formula Mg(OR 1 ) 2 wherein R 1 is an alkyl group having 1 to 4 carbon atoms with (ii) a phthalate diester in an amount of from 0.01 to 1 moles per mole of said dialkoxymagnesium compound, (iii) tetrachlorosilane in an amount of 0.01 to 5 moles per mole of said dialkoxymagnesium compound and (iv) an alcohol of the formula R 4 OH, wherein R 4 is selected from the group consisting of a linear or branched alkyl group having 1 to 10 carbon atoms and a cycloalkyl group, said alcohol being in an amount of 0.01 to 2 moles per mole of said dialkoxymagnesium compound, to form a solid reaction product; and then reacting, in a second step, the solid reaction product with a titanium tetrachloride compound.
Claim 7
Dependent Claim
189 words
A process of producing an olefin polymer having stereoregularity by polymerizing olefin monomers in the presence of a catalyst, said catalyst comprising: (A) a solid catalyst component, (B) a tri-C 1 -C 5 -alkylaluminum, and (C) an electron donative compound; wherein said solid catalyst component (A) is obtained by reacting, in a first step, (i) a dialkoxymagnesium compound of the formula Mg(OR 1 ) 2 wherein R 1 is an alkyl group having 1 to 4 carbon atoms with (ii) a phthalate diester in an amount of from 0.01 to 1 moles per mole of said dialkoxymagnesium compound, (iii) tetrachlorosilane in an amount of 0.01 to 5 moles per mole of said dialkoxymagnesium compound and (iv) an alcohol of the formula R 4 OH, wherein R 4 is selected from the group consisting of a linear or branched alkyl group having 1 to 10 carbon atoms and a cycloalkyl group, said alcohol being in an amount of 0.01 to 2 moles per mole of said dialkoxymagnesium compound, to form a solid reaction product; and then reacting, in a second step, the solid reaction product with a titanium tetrachloride compound.
Claim 8
Dependent Claim
49 words
A process of producing an olefin polymer as claimed in claim 5, wherein the olefin monomers are represented by the general formula: R 3 --CH═CH 2 wherein R 3 is selected from the group consisting of a hydrogen atom, and an alkyl group having 1 to 6 carbon atoms.
Claim 9
Dependent Claim
28 words
A process of producing an olefin polymer as claimed in claim 5, wherein the olefin monomers are selected from the group consisting of ethylene, propylene and mixtures thereof.
Claim 10
Dependent Claim
19 words
A process of producing an olefin polymer as claimed in claim 5, wherein the phthalate diester is dibutyl phthalate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |