Claims
- 1. A method for producing metallocycle metallocenes which involves reacting a first metallocene having an aralkyl group, an aryl alkyldialkylsilyl, or an aryl dialkyl silyl group attached to a cyclodienyl group with about two molar equilvalents of an alkali metal alkyl having at least 4 carbon atoms.
- 2. A method according to claim 1 wherein the aryl group of the aralkyl, aryl alkyldialkyl silyl, or aryl dialkyl silyl group is a hydrocarbyl substituted or unsubstituted cyclic compound having at least one six membered ring, examples of which would include phenyl, indenyl, fluorenyl, naphthyl, benzoindenyl, anthracenyl, phenanthracenyl, wherein the alkyl group of the aralkyl group has 1 to 3 carbons separating the aryl group and the cyclodienyl group and the alkyl groups of the dialkyl silyl group have 1 to 4 carbon atoms.
- 3. A method according to claim 2 wherein the first metallocene is a metallocene of Zr, Hf, or Ti.
- 4. A method according to claim 3 wherein the first metallocene is a sandwich bonded metallocene in which two cyclodienyl groups are bonded to the metal of the metallocene.
- 5. A method according to claim 4 wherein the first metallocene is an unbridged metallocene in which the two cyclodienyl groups are not bonded to each other.
- 6. A method according to claim 5 wherein only one of the cyclodienyl groups has the aralkyl, aralkyldialkylsilyl, or aryl dialkyl substituent.
- 7. A method according to claim 5 wherein both of the cyclodienyl groups have the aralkyl, aralkyldialkylsilyl, or aryl dialkyl substituent.
- 8. A method according to claim 6 wherein both of the cyclodienyl groups are the same.
- 9. A method according to claim 7 wherein both cyclodienyl groups are selected from aralkyl substituted cyclopentadienyl and aralkyl substituted indenyl and the aryl portion of the aralkyl substituent is selected from the group consisting of phenyl, 4-methyl phenyl, 3,5-dimethylphenyl, naphthyl, 1-indenyl and 9-fluorenyl.
- 10. A method according to claim 8 wherein the alkyl portion of the aralkyl substituent is selected from the divalent alkylenes methylene, ethylene, propylene, and 1,1-dimethyl methylene.
- 11. A method according to claim 7 wherein both cyclodienyl groups are selected from aryl dialkyl silyl substituted cyclopentadienyl and aryl dialkyl silyl substituted indenyl.
- 12. A method according to claim 5 wherein only one of the cyclodienyl groups has the aralkyl, aralkyldialkylsilyl, or aryl dialkyl silyl substitutent.
- 13. A method according to claim 11 wherein the other cyclodienyl group is selected from the group consisting of cyclopentadienyl, indenyl, and fluorenyl.
- 14. A method according to claim 12 wherein the aryl group of the aralkyl group is selected from the group consisting of phenyl, and 4-methyl phenyl.
- 15. A method according to claim 4 wherein the first metallocene is a bridged metallocene in which the two cyclodienyl groups are bonded to each other.
- 16. A method according to claim 15 wherein the first metallocene is selected from 1-(9-fluorenyl)-1-(3-phenylalkylcyclopentadienyl)-1,1-dimethyl methane dichloride.
- 17. A method according to claim 16 wherein the alkyl group of the 3-phenylalkylcyclopentadienyl group is selected from the divalent radicals ethylene and 1,1-dimethylmethane.
- 18. A metallocycle metallocene produced by the process of claim 1.
- 19. A metallocycle metallocene of the formula having the formula
- 20. A double metallocycle metallocene of the formula
- 21. A double metallocycle according to claim 20 having the name (1-(n5-cyclopentadienyl)-1,1-dimethyl-1-(1-indenyl)-methane) zirconium (1-(n5-cyclopentadienyl)-1,1-dimethyl-1-(1-indanyl)-methane).
- 22. A catalyst composition useful for the polymerization of olefins comprising the composition resulting from the combination of a metallocycle metallocene produced by the process of claim 1 and a suitable organometallic cocatalyst.
- 23. A catalyst composition according to claim 22 wherein the cocatalyst comprises an alkylaluminoxane.
- 24. A catalyst composition according to claim 22 which is a solid produced by prepolymerizing an olefin in the presence of the metallocycle metallocene and the alkylaluminoxane.
- 25. A catalyst composition according to claim 23 wherein the metallocene has the formula
- 26. A composition according to claim 23 wherein the metallocycle metallocene has the formula
- 27. A process for producing a polymer comprising contacting at least one olefin with a catalyst composition of claim 22.
Parent Case Info
[0001] This application claims the benefit of U.S. Provisional Application No. 60/090,037, filed Jun, 19, 1998, the disclosure of which is incorporated herein by reference.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60090037 |
Jun 1998 |
US |
Divisions (1)
|
Number |
Date |
Country |
Parent |
09334890 |
Jun 1999 |
US |
Child |
09975223 |
Oct 2001 |
US |