EP0423101A2
Expired / Lapsed
EP
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Catalyst for producing hemiisotactic polypropylene
Assignee: Fina Technology Inc
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Filing: 1990-10-09
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Granted: —
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Expires: 2010-10-09
Abstract
Abstract This invention is for a metallocene compound which can be used in a catalyst system to produce hemiisotactic polymer. The compound is a bridged metallocene compound having dissimilar cyclopentadienyl groups and no bi-lateral symmetry. One example of the compound is isopropylidene(3-methylcyclopentadienyl-1-fluorenyl) zirconium dichloride. The catalyst of this invention can be converted to an ionic metallocene catalyst by an ionizing agent, such as methylaluminoxane. The polymer produced with this catalyst is characterized by having an isotactic structure effecting only every other asymmetric carbon atom. In the case of polypropylene, every other methyl group is on the same side of the principal polymer chain as represented by a Fisher projection. The remaining methyl groups can be either on the same side or on the opposite side of the principal polymer chain. The polymer produced with the catalyst of this invention can be used as a plasticizer.
Inventors
- 👤 John A. Ewen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 13:18
CPC Classifications
C; C08; C08F; C08F4/00; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C07; C07F; C07F17/00; C08F10/00; C08F10/04; C08F10/06; C08F110/00; C08F110/04; C08F110/06; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/64; C08F4/659; C08F4/65904; C08F4/65912; C08F4/6592; C08F4/65922; C08F4/65927; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
97 words
A metallocene compound comprising the general formula: R˝(CpR n )(CpR′ m )MHal₂ where Cp is cyclopentadienyl or a substituted cyclopentadienyl, each R and R′ is a hydrocarbyl radical having from 1-20 carbon atoms and is the same or different and is selected such that CPR′ m is a sterically different ring from CpR n resulting in a lack of bi-lateral symmetry for the compound, R˝ is a structural bridge imparting stereorigidity to the compound, M is a Group 4 metal, n is from 0 to 4, m is from 0 to 4 and Hal is a halogen.
Claim 2
Dependent Claim
97 words
A metallocene compound comprising the general formula: R˝(CpR n )(CpR′ m )MHal₂ where Cp is cyclopentadienyl or a substituted cyclopentadienyl, each R and R′ is a hydrocarbyl radical having from 1-20 carbon atoms and is the same or different and is selected such that CPR′ m is a sterically different ring from CpR n resulting in a lack of bi-lateral symmetry for the compound, R˝ is a structural bridge imparting stereorigidity to the compound, M is a Group 4 metal, n is from 0 to 4, m is from 0 to 4 and Hal is a halogen.
Claim 3
Dependent Claim
15 words
A metallocene compound as recited in Claim 1 wherein M is titanium, zirconium and hafnium.
Claim 4
Dependent Claim
12 words
A metallocene compound as recited in Claim 1 wherein Hal is chlorine.
Claim 5
Dependent Claim
15 words
A metallocene compound as recited in Claim 1 wherein the compound is isopropylidene(3-methylcyclopentadienyl -1-fluorenyl)zirconium dichloride.
Claim 6
Dependent Claim
114 words
A metallocene catalyst comprising: a) a metallocene compound; and b) an ionizing agent; wherein the metallocene compound comprises the general formula: R˝(CpR n )(CpR′ m )MHal₂ where Cp is cyclopentadienyl, each R and R′ is a hydrocarbyl radical having from 1-20 carbon atoms and is the same or different and is selected such that CpR′ m is a sterically different ring from CpR n resulting in a lack of bi-lateral symmetry for the compound, R˝ is a structural bridge imparting stereorigidity to the compound, M is a Group 3, Group 4, Group 5 or Group 6 metal, n is from 0 to 4, m is from 0 to 4 and Hal is a halogen.
Claim 7
Dependent Claim
114 words
A metallocene catalyst comprising: a) a metallocene compound; and b) an ionizing agent; wherein the metallocene compound comprises the general formula: R˝(CpR n )(CpR′ m )MHal₂ where Cp is cyclopentadienyl, each R and R′ is a hydrocarbyl radical having from 1-20 carbon atoms and is the same or different and is selected such that CpR′ m is a sterically different ring from CpR n resulting in a lack of bi-lateral symmetry for the compound, R˝ is a structural bridge imparting stereorigidity to the compound, M is a Group 3, Group 4, Group 5 or Group 6 metal, n is from 0 to 4, m is from 0 to 4 and Hal is a halogen.
Claim 8
Dependent Claim
21 words
A metallocene compound as recited in Claim 5 wherein M is selected from the group consisting of titanium, zirconium and hafnium.
Claim 9
Dependent Claim
12 words
A metallocene compound as recited in Claim 5 wherein Hal is chlorine.
Claim 10
Dependent Claim
15 words
A metallocene compound as recited in Claim 5 wherein the compound is isopropylidene(3-methylcyclopentadienyl -1-fluorenyl)zirconium dichloride.
Claim 11
Dependent Claim
98 words
A plasticizer comprising a polymer having monomeric units from monomers from a substituted vinyl compound characterized by the following formula: CH₂=CHR s wherein R s is a hydrocarbyl group or nonhydrocarbyl substituent, and wherein the polymer is characterized by the R s groups attached to every other asymmetric carbon atom being on the same side of the principal polymer chain and the R s groups attached to the remaining asymmetric carbon atoms being either on the same side or the opposite side of the R s groups attached to every other asymmetric carbon atom in the following structure:
Claim 12
Dependent Claim
98 words
A plasticizer comprising a polymer having monomeric units from monomers from a substituted vinyl compound characterized by the following formula: CH₂=CHR s wherein R s is a hydrocarbyl group or nonhydrocarbyl substituent, and wherein the polymer is characterized by the R s groups attached to every other asymmetric carbon atom being on the same side of the principal polymer chain and the R s groups attached to the remaining asymmetric carbon atoms being either on the same side or the opposite side of the R s groups attached to every other asymmetric carbon atom in the following structure:
Claim 13
Dependent Claim
32 words
A plasticizer as recited in Claim 9 wherein the monomer is propylene and wherein the plasticizer is used with a plastic selected from the group consisting of isotactic polypropylene and syndiotactic polypropylene.
Claim 14
Dependent Claim
13 words
A plasticizer as recited in Claim 10 wherein the plastic is syndiotactic polypropylene.
Claim 15
Dependent Claim
16 words
A plasticizer as recited in Claim 11 wherein the amount of plasticizer is 1-90% by weight.
Claim 16
Dependent Claim
16 words
A plasticizer as recited in Claim 12 wherein the amount of plasticizer is 5-50% by weight.
Claim 17
Dependent Claim
17 words
A plasticizer as recited in Claim 13 wherein the amount of plasticizer is approximately 10% by weight.
References Cited (Backward Citations)
No citation records indexed.
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