Dual-headed organoaluminum compositions
The present disclosure relates to dual-headed organoaluminum compositions having the formula (I) and processes to prepare the same. In at least one aspect, the compositions having the formula (I) may be used during olefin polymerization.
1. A composition of formula (I):
wherein:
n is a number from 1 to 100;
each J group is independently hydrogen or a substituted or unsubstituted acyclic alkyl group;
two J groups attached to the same Al atom can be optionally covalently linked together;
and Y is a linking group comprising two points of attachment to Al atoms and is selected from the group consisting of the following formulas (II) to (V):
—CH 2 CH 2 (CHR 1 ) m CH 2 CH 2 — (II),
wherein:
R 1 is hydrogen or a C 1 to C 20 alkyl or aryl group; and
m is a number from 0 to 20.
2. The composition of claim 1 , wherein each J is hydrogen or a C 1 to C 20 acyclic alkyl group.
3. The composition of claim 1 , wherein n is a number from 1 to 10.
4. The composition of claim 1 , wherein n is a number from 1 to 3.
5. A process for preparing an organoaluminum composition, the process comprising:
(a) combining an aluminum compound, a linking agent, and an optional solvent at a temperature of from 25° C. to 200° C., and
(b) obtaining the organoaluminum composition, wherein:
the aluminum compound has the formula Al(J) 3 , wherein each J group is independently hydrogen or a substituted or unsubstituted acyclic alkyl group, and, optionally, two J groups can be covalently linked together; and the linking agent is 1,2,4-trivinylcyclohexane or 1,3-divinylcyclopentane.
6. An organoaluminum composition comprising the reaction product of: an aluminum compound, a linking agent, and an optional solvent, wherein:
the aluminum compound has the formula Al(J) 3 , wherein each J group is independently hydrogen or a substituted or unsubstituted acyclic alkyl group, and, optionally, two J groups attached to the same Al atom can be covalently linked together; and
the linking agent is 1,2,4-trivinylcyclohexane or 1,3-divinylcyclopentane.
7. A polymerization process for preparing a polymer composition, the process comprising: (a) contacting at least one olefin monomer with a catalyst composition, wherein the catalyst composition comprises the reaction product of at least one catalyst precursor, at least one co-catalyst, and the composition of claim 1 , and (b) obtaining the polymer composition.
8. A polymer composition prepared by the process of claim 7 , wherein the polymer composition comprises one or two aluminum termini.
9. A process for preparing a polymer or a polymer mixture by converting polymer-Al bonds of the polymer composition of claim 8 using either chemical reagent or high temperature.