Claims
- 1. Catalysts for the polymerization of alpha-olefins comprising the reaction product of:
- (A) an aluminumalkyl compound;
- (B) an organosilane compound of the formula ##STR4## wherein R is a linear or branched C.sub.1-4 alkyl, 4-methylpiperidyl, C.sub.6-12 aryl or C.sub.5-7 cycloalkyl; R.sup.1 is hydrogen, methyl or ethyl; R.sup.2 is methyl or ethyl and; n is 4 to 7; and
- (C) a solid component comprising a titanium compound having at least a Ti-halogen bond and an electron donor compound both supported on an activated anhydrous Mg-dihalide.
- 2. The catalysts according to claim 1, in which the organosilane compound is the compound wherein n is 4 and R is t-butyl.
- 3. The catalysts according to claim 1, in which the organosilane compound is the compound wherein n is 5, R is isopropyl and R.sup.1 is methyl.
- 4. The catalysts according to claim 1, in which the organosilane compound is the compound wherein n is 5, R is t-butyl and R.sup.1 is methyl.
- 5. The catalysts according to claim 1, in which the organosilane compound is the compound wherein n is 5, R is n-butyl and R.sup.1 is methyl.
- 6. The catalysts according to claim 1, in which the organosilane compound is the compound wherein n is 5, R is 4-methylpiperidyl and R.sup.1 is methyl.
- 7. The catalysts according to claim 1, in which the organosilane compound is the compound wherein n is 5, R is 2-bicycloheptyl and R.sup.1 is methyl.
- 8. The catalysts according to claim 1, in which the organosilane compound is the compound wherein n is 7.
Parent Case Info
This application is a division, of application Ser. No. 07/573,618, filed Aug. 27, 1990, U.S. Pat. No. 5,166,340.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5166340 |
Stewart |
Nov 1992 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
573618 |
Aug 1990 |
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