Patent US2724884A successfully refreshed from Google Patents.
US5093441A
Expired / Lapsed
US
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Polymerization of norbornene derivatives
Assignee: Shell USA Inc
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Filing: 1990-02-16
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Granted: 1992-03-03
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Expires: 2010-02-16
Abstract
Abstract A process for the production of thermoset polymers comprising contacting at least one monomer of the formulae: ##STR1## with a metathesis catalyst system which comprises a tungsten catalyst and a tin or silicon hydride cocatalyst.
Inventors
- 👤 Willem Sjardijn
- 👤 Johannes J. M. Snel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:38
CPC Classifications
C; C08; C08F; C08F32/00; C07; C07C; C07C13/00; C07C13/28; C07C13/32; C07C13/62; C07C13/66; C07C13/68; C07C13/64; C08G; C08G61/00; C08G61/02; C08G61/04; C08G61/06; C08G61/08; C07C2603/00; C07C2603/56; C07C2603/86; C07C2603/90
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
56 words
A process comprising contacting at least one monomer of the formulae: ##STR4## with a ring-opening metathesis catalyst system comprising a tungsten catalyst which is the reaction product of a tungsten halide and a phenol and a cocatalyst selected from triorgano tin hydrides and silicon hydrides, under conditions effective for polymerization of said at least one monomer.
Claim 2
Dependent Claim
56 words
A process comprising contacting at least one monomer of the formulae: ##STR4## with a ring-opening metathesis catalyst system comprising a tungsten catalyst which is the reaction product of a tungsten halide and a phenol and a cocatalyst selected from triorgano tin hydrides and silicon hydrides, under conditions effective for polymerization of said at least one monomer.
Claim 3
Dependent Claim
23 words
The process of claim 1 in which the catalyst component is the product of reacting tungsten hexachloride or tungstenoxy tetrachloride with a phenol.
Claim 4
Dependent Claim
44 words
The process of claim 1 in which a mixture of monomers I and II containing from 50 to 95% by weight of monomer I and from 5 to 50% by weight of monomer II, based on the total weight of both monomers, is polymerized.
Claim 5
Dependent Claim
38 words
The process of claim 1 in which the polymerization process is carried out using monomer mixtures of monomers I and II containing up to 30% by weight of dicyclopentadiene, calculated on the weight of the total monomer mixture.
Claim 6
Dependent Claim
18 words
The process of claim 4 in which a monomer mixture containing 5-20% by weight of dicyclopentadiene is used.
Claim 7
Dependent Claim
31 words
The process of claim 1 in which catalyst component 1 is the reaction product of a tungsten halide and a monocyclic phenol having a trihalomethyl substituent attached to the aromatic nucleus.
Claim 8
Dependent Claim
25 words
The process of claim 6 in which the trihalomethyl-substituted phenol is selected from the group consisting of 3-trifluoromethylphenol, 2-trichloromethylphenol, 4-trifluoromethylphenol, 2-trifluoromethylphenol, 3-chlorodifluoromethylphenol, 3-dichlorofluoromethylphenol and 3-tribromomethylphenol.
Claim 9
Dependent Claim
86 words
The process of claim 1 in which the metathesis catalyst system is the product of combining the following components: (1) a tungsten compound which is the reaction product of a tungsten halide and a substituted or unsubstituted para-trihalomethylphenol and (2) one or more compounds of the formula: ##STR5## in which Q represents Sn or Si, R 1 , R 2 and R 3 are independently selected from C 1-20 alkyl, C 3-6 cycloalkyl and phenyl, and R 1 and R 2 are additionally selected from hydrogen.
Claim 10
Dependent Claim
25 words
The process of claim 8 in which the catalyst component 1 is dissolved in a solvent comprising at least one of monomers I and II.
Claim 11
Dependent Claim
24 words
The process of claim 8 in which the molar ratio of phenol to tungsten is within the range of about 3:2 to about 3:1.
Claim 12
Dependent Claim
26 words
The process of claim 8 in which catalyst component (2) is selected from the group consisting of tripropyltinhydride, tripentyltinhydride, tributyltinhydride, methyldicyclohexyltinhydride, cyclopentyldimethyltinhydride, trioctyltinhydride, triphenyltinhydride and phenyldimethyltinhydride.
Claim 13
Dependent Claim
12 words
The process of claim 8 in which catalyst component (2) is tributyltinhydride.
Claim 14
Dependent Claim
27 words
The process of claim 8 in which catalyst component (2) is selected from the group consisting of dibutylsilane, triethylsilane, trihexylsilane, dipropylsilane, dipentylsilane, diphenylsilane, dicyclohexylsilane, dicyclopentylsilane and dioctylsilane.
Claim 15
Dependent Claim
23 words
The process of claim 8 in which the molar ratio of tungsten to dicyclopentadiene monomer is within the range of 1:1,000 to 1:10,000.
Claim 16
Dependent Claim
26 words
The process of claim 8 in which the molar ratio of catalyst component (2) to tungsten is within the range of about 12:1 to about 3:1.
Claim 17
Dependent Claim
19 words
A composition comprising at least one of compounds represented by formulas I and II and ##STR6## a tungsten halide.
Claim 18
Dependent Claim
19 words
A composition comprising at least one of compounds represented by formulas I and II and ##STR6## a tungsten halide.
Claim 19
Dependent Claim
11 words
The composition of claim 16 which further comprises a triorganotin hydride.
Claim 20
Dependent Claim
26 words
A polymeric product of the process of claim 1 comprising a major portion of polymerized units derived from at least one of monomers I and II.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |