US5028672A
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US
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Catalyst and process for polymerization of norbornene derivatives
Assignee: Shell USA Inc
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Filing: 1990-11-13
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Granted: 1991-07-02
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Expires: 2010-11-13
Abstract
Abstract Disclosed is a process for the polymerization of norbornene derivatives which comprises contacting the monomer(s) with a catalytic system comprising the following two components: (1) a tungsten compound which is the product of combining a tungsten halide with a para-trihalomethylphenol which can be described by the formula ##STR1## in which each R is selected from alkyl and halide, and (2) a compound of the general formula: ##STR2## in which at least two of R 1 , R 2 and R 3 are selected from unsubstituted and substituted C 1-20 hydrocarbyl.
Inventors
- 👤 Willem Sjardijn
- 👤 Wilhelmina J. M. van der Linden-Lemmers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:45
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
91 words
A process comprising contacting under polymerization conditions a norbornene monomer with a catalytic system comprising the following two components: (1) a tungsten compound which is the product of contacting a tungsten halide with a para-trihalomethylphenol which can be represented by the formula ##STR8## in which X is halide and each R is independently selected from halide and alkyl; and (2) a compound of the general formula: ##STR9## in which at least two of R 1 , R 2 and R 3 are selected from a substituted and unsubstituted C 1-20 hydrocarbyl.
Claim 2
Dependent Claim
91 words
A process comprising contacting under polymerization conditions a norbornene monomer with a catalytic system comprising the following two components: (1) a tungsten compound which is the product of contacting a tungsten halide with a para-trihalomethylphenol which can be represented by the formula ##STR8## in which X is halide and each R is independently selected from halide and alkyl; and (2) a compound of the general formula: ##STR9## in which at least two of R 1 , R 2 and R 3 are selected from a substituted and unsubstituted C 1-20 hydrocarbyl.
Claim 3
Dependent Claim
12 words
The process of claim 1 in which the norbornene monomer comprises dicyclopentadiene.
Claim 4
Dependent Claim
36 words
The process of claim 2 in which the norbornene monomer further comprises at least one comonomer selected from cycloalkadiene and cycloalkene in an amount of less than 50% by weight, based on the weight of dicyclopentadiene.
Claim 5
Dependent Claim
20 words
The process of claim 1 in which the tungsten halide is selected from tungsten hexachloride, tungsten oxytetrachloride and mixtures thereof.
Claim 6
Dependent Claim
21 words
The process of claim 1 in which the para-trihalomethylphenol is selected from ortho-chloro-para-trifluoromethylphenol, ortho-methyl-para-trichloromethylphenol, ortho-methyl-para-trifluoromethylphenol, para-tribromomethylphenol, para-trichloromethylphenol, para-trifluoromethylphenol, and mixtures thereof.
Claim 7
Dependent Claim
11 words
The process of claim 5 in which the para-trihalomethylphenol is para-trifluoromethylphenol.
Claim 8
Dependent Claim
14 words
The process of claim 1 in which component (1) is prepared in dicyclopentadiene solvent.
Claim 9
Dependent Claim
37 words
The process of claim 5 in which component 2 is selected from the group consisting of dibutyl silane, triethyl silane, trihexyl silane, dipropyl silane, dipentyl silane, dicyclohexyl silane, dicyclopentyl silane, dioctyl silane, allyldimethyl silane and diphenyl silane.
Claim 10
Dependent Claim
26 words
The process of claim 1 in which the molar ratio of the para-trihalomethylphenol to the tungsten compound is within the range of from 1:1 to 6:1.
Claim 11
Dependent Claim
26 words
The process of claim 9 in which the molar ratio of the para-trihalomethylphenol to the tungsten compound is within the range of from 3:2 to 3:1.
Claim 12
Dependent Claim
42 words
The process of claim 1 in which component (2) is a compound of formula I in which at least two of R 1 , R 2 and R 3 are independently selected from the group consisting of C 2-4 alkyl and phenyl.
Claim 13
Dependent Claim
17 words
The process of claim 1 in which component (2) is selected from triethyl silane and diphenyl silane.
Claim 14
Dependent Claim
9 words
The process of claim 1 which further comprises tributyltinhydride.
Claim 15
Dependent Claim
27 words
The process of claim 1 in which the molar ratio of the tungsten compound and the norbornene monomer is within the range of from 1:1000 to 1:10,000.
Claim 16
Dependent Claim
26 words
The process of claim 1 in which the molar ratio of component (2) to the tungsten compound is within the range of from 12:1 to 3:1.
References Cited (Backward Citations)
US4550216A
Cited
US4810762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |