US5100983A
Expired / Lapsed
US
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Process for producing syndiotactic polymer of aromatic vinyl compounds
Assignee: Tosoh Corp
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Filing: 1991-03-07
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Granted: 1992-03-31
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Expires: 2011-03-07
Abstract
Abstract A catalyst for polymerizing an aromatic vinyl compound, comprising a transition metal compound as a catalyst component (A) represented by the general formula ##STR1## where M is an element of Group IVb of the Periodic Table of Elements; X 1 and X 2 are respectively halogen; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are respectively hydrogen or an alkyl group of from 1 to 6 carbons; and m is an integer of 1 to 6; and an aluminoxane as a catalyst component (B) represented by the general formula (2) or (3): ##STR2## where n is an integer of from 4 to 60; and R 7 is an alkyl of from 1 to 6 carbons, phenyl or benzyl, preferably methyl, and a process for producing a polymer of an aromatic vinyl compound, comprising polymerizing the aromatic vinyl compound in the presence of the catalyst.
Inventors
- 👤 Akira Miyashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:47
CPC Classifications
C; C08; C08F; C08F12/00; C08F12/02; C08F12/04; C08F4/00; C08F4/06; C08F4/08; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65912; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
141 words
A process for producing a syndiotactic polymer of an aromatic vinyl compound, comprising polymerizing an aromatic vinyl compound in the presence of a catalyst comprising a transition metal compound as a catalyst component (A) having the formula (1): ##STR7## wherein M is an element of Group IVb of the Periodic Table of Elements; X 1 and X 2 are, individually, halogen; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are, individually, hydrogen or an alkyl group of from 1 to 6 carbons; and m is an integer of 1 to 6; and an aluminoxane as a catalyst component (B) having the formula (2) or (3): ##STR8## wherein n is an integer of from 4 to 60; and R 7 is an alkyl group of from 1 to 6 carbons, phenyl or benzyl.
Claim 2
Dependent Claim
141 words
A process for producing a syndiotactic polymer of an aromatic vinyl compound, comprising polymerizing an aromatic vinyl compound in the presence of a catalyst comprising a transition metal compound as a catalyst component (A) having the formula (1): ##STR7## wherein M is an element of Group IVb of the Periodic Table of Elements; X 1 and X 2 are, individually, halogen; R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are, individually, hydrogen or an alkyl group of from 1 to 6 carbons; and m is an integer of 1 to 6; and an aluminoxane as a catalyst component (B) having the formula (2) or (3): ##STR8## wherein n is an integer of from 4 to 60; and R 7 is an alkyl group of from 1 to 6 carbons, phenyl or benzyl.
Claim 3
Dependent Claim
12 words
The process of claim 1, wherein M is titanium, zirconium or hafnium.
Claim 4
Dependent Claim
9 words
The process of claim 1, wherein M is titanium.
Claim 5
Dependent Claim
9 words
The process of claim 1, wherein m is 1-2.
Claim 6
Dependent Claim
10 words
The process of claim 1, wherein said halogen is chlorine.
Claim 7
Dependent Claim
11 words
The process of claim 1, wherein said catalyst is methylene-bis(cyclopentadienyl)titanium dichloride.
Claim 8
Dependent Claim
11 words
The process of claim 1, wherein said catalyst is ethylene-bis(2,3,4,5-tetramethylcyclopentadienyl)titanium dichloride.
Claim 9
Dependent Claim
23 words
The process of claim 1, wherein the molar ratio of component (B) to component (A) is in the range from 10 to 1,000.
Claim 10
Dependent Claim
15 words
The process of claim 1, wherein the molar ratio of Al/Ti is less than 300.
Claim 11
Dependent Claim
24 words
The process of claim 1, wherein said polymerizing step is conducted at a temperature in the range of from -70° C. to 150° C.
Claim 12
Dependent Claim
30 words
The process of claim 1, wherein said polymerizing step is conducted in the presence of a solvent selected from the group consisting of aliphatic hydrocarbons, alicyclic hydrocarbons and aromatic hydrocarbons.
Claim 13
Dependent Claim
22 words
The process of claim 1, wherein said polymerizing step is conducted a concentration of component (A) of from 0.1 to 1,000 mmol/l.
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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) | 1995-03-31 | 1995-09-30 | 1996-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-31 | 1999-09-30 | 2000-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-31 | 2003-09-30 | 2004-03-31 | $7700.00 | Window Closed / Lapsed |