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US4771023A
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Process for producing olefin polymers and catalyst used therein
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1986-06-11
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Granted: 1988-09-13
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Expires: 2006-06-11
Abstract
Abstract Olefin polymers are produced by a process which comprises homopolymerizing or copolymerizing olefins in the presence of a catalyst system comprising: (A) a solid catalyst component containing a trivalent titanium compound, which is obtained by reducing a titanium compound represented by the general formula Ti(OR 1 ) n X 4-n (wherein R 1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and n is a number satisfying 0<n≦4) with an organo magnesium compound and then treating the resulting solid product with a mixture of an ether compound and titanium tetrachloride, and (B) an organo aluminum compound. The above-mentioned reducing of a titanium compound with an organo magnesium compound may be performed in the presence of an organo silicon compound having Si--O bonds.
Inventors
- 👤 Toshio Sasaki
- 👤 Masaaki Katao
- 👤 Kiyoshi Kawai
- 👤 Akinobu Shiga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:09
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A solid catalyst component for olefin polymerization, which is obtained by reducing a titanium compound represented by the general formula Ti(OR 1 ) n X 4-n (wherein R 1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and n is a number satisfying 0<n≦4) with an organo magnesium compound in the presence of an organo silicon compound having Si--O bonds represented by the following general formula: Si(OR.sup.3).sub.m R.sup.4.sub.4-m, R.sup.5 (R.sub.2.sup.6 SiO).sub.p SiR.sup.7.sub.3 or (R.sup.8.sub.2 SiO).sub.q (wherein R 3 is a hydrocarbon group having 1 to 20 carbon atoms; R 4 , R 5 , R 6 , R 7 and R 8 are each a hydrocarbon group having 1 to 20 carbon atoms or a hydrogen atom; m is a number satisfying 0<m≦4; p is an integer of 1 to 1,000; and q is an integer of 2 to 1,000; and then treating the resulting solid product with a mixture of dialkyl ether and titanium tetrachloride.
Claim 2
Dependent Claim
163 words
A solid catalyst component for olefin polymerization, which is obtained by reducing a titanium compound represented by the general formula Ti(OR 1 ) n X 4-n (wherein R 1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and n is a number satisfying 0<n≦4) with an organo magnesium compound in the presence of an organo silicon compound having Si--O bonds represented by the following general formula: Si(OR.sup.3).sub.m R.sup.4.sub.4-m, R.sup.5 (R.sub.2.sup.6 SiO).sub.p SiR.sup.7.sub.3 or (R.sup.8.sub.2 SiO).sub.q (wherein R 3 is a hydrocarbon group having 1 to 20 carbon atoms; R 4 , R 5 , R 6 , R 7 and R 8 are each a hydrocarbon group having 1 to 20 carbon atoms or a hydrogen atom; m is a number satisfying 0<m≦4; p is an integer of 1 to 1,000; and q is an integer of 2 to 1,000; and then treating the resulting solid product with a mixture of dialkyl ether and titanium tetrachloride.
Claim 3
Dependent Claim
41 words
A solid catalyst component according to claim 1, wherein the organo silicon compound having Si--O bonds is an alkoxysilane compound represented by the general formula Si(OR 3 ) m R 4 4-m , in which m is a number satisfying 1≦m≦4.
Claim 4
Dependent Claim
40 words
A solid catalyst component according to claim 1, wherein the organo silicon compound having Si--O bonds is used in an amount of 1 to 30 in terms of the atomic ratio of silicon atom to titanium atom in titanium compound.
Claim 5
Dependent Claim
190 words
A catalyst system for olefin polymerization comprising (A) a solid catalyst component containing a trivalent titanium compound and (B) an organo aluminum comound; wherein the solid catalyst component (A) containing the tri-valent titanium compound is obtained by reducing a titanium compound represented by the general formula Ti(OR 1 ) n X 4-n (wherein R 1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and n is a number satisfying 0<n≦4) with an organo magnesium compound in the presence of an organo silicon compound having Si--O bonds represented by the following general formula: Si(OR.sup.3).sub.m R.sup.4 4-m, R.sup.5 (R.sub.2.sup.6 SiO).sub.p SiR.sup.7.sub.3 or (R.sup.8.sub.2 SiO).sub.q (wherein R 3 is a hydrocarbon group having 1 to 20 carbon atoms; R 4 , R 5 , R 6 , R 7 and R 8 are each a hydrocarbon group having 1 to 20 carbon atoms or a hydrogen atom; m is a number satisfying 0<m≦4; p is an integer of 1 to 1,000, and q is an integer of 2 to 1,000) and then treating the resulting solid product with a mixture of dialkyl ether and titanium tetrachloride.
Claim 6
Dependent Claim
190 words
A catalyst system for olefin polymerization comprising (A) a solid catalyst component containing a trivalent titanium compound and (B) an organo aluminum comound; wherein the solid catalyst component (A) containing the tri-valent titanium compound is obtained by reducing a titanium compound represented by the general formula Ti(OR 1 ) n X 4-n (wherein R 1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and n is a number satisfying 0<n≦4) with an organo magnesium compound in the presence of an organo silicon compound having Si--O bonds represented by the following general formula: Si(OR.sup.3).sub.m R.sup.4 4-m, R.sup.5 (R.sub.2.sup.6 SiO).sub.p SiR.sup.7.sub.3 or (R.sup.8.sub.2 SiO).sub.q (wherein R 3 is a hydrocarbon group having 1 to 20 carbon atoms; R 4 , R 5 , R 6 , R 7 and R 8 are each a hydrocarbon group having 1 to 20 carbon atoms or a hydrogen atom; m is a number satisfying 0<m≦4; p is an integer of 1 to 1,000, and q is an integer of 2 to 1,000) and then treating the resulting solid product with a mixture of dialkyl ether and titanium tetrachloride.
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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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |