Procatalyst composition with substituted 1,2-phenylene aromatic diester internal donor and method
View Patent ↗Disclosed are procatalyst compositions having an internal electron donor which include a substituted phenylene aromatic diester and optionally an electron donor component. Ziegler-Natta catalyst compositions containing the present procatalyst compositions exhibit high activity and produce propylene-based olefins with broad molecular weight distribution.
1. A procatalyst composition comprising:
a combination of a magnesium moiety, a titanium moiety and an internal electron donor comprising a substituted phenylene aromatic diester having the structure (I)
wherein R 1 -R 14 are the same or different, each of R 1 -R 14 is selected from the group consisting of hydrogen, a substituted hydrocarbyl group having 1 to 20 carbon atoms, an unsubstituted hydrocarbyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a heteroatom, and combinations thereof; and
two consecutive R groups in R 1 -R 4 are linked to form a cyclic structure.
2. The procatalyst composition of claim 1 wherein R 1 -R 2 form a C 6 membered ring and each of R 3 -R 14 is selected from the group consisting of hydrogen, a substituted hydrocarbyl group having 1 to 20 carbon atoms, an unsubstituted hydrocarbyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a heteroatom, and combinations thereof.
3. The procatalyst composition of claim 1 wherein each of R 3 -R 14 is hydrogen.
4. The procatalyst composition of claim 1 wherein the substituted phenylene aromatic diester has the structure (IV)
and each of R 3 -R 14 is hydrogen.
5. The procatalyst composition of claim 1 wherein R 2 -R 3 form a C 6 membered ring and each of R 1 , R 4 and R 5 -R 14 is selected from the group consisting of hydrogen, a substituted hydrocarbyl group having 1 to 20 carbon atoms, an unsubstituted hydrocarbyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a heteroatom, and combinations thereof.
6. The procatalyst composition of claim 5 wherein each of R 1 , R 4 and R 5 -R 14 is hydrogen.
7. The procatalyst composition of claim 1 wherein the substituted phenylene aromatic diester has the structure (V)
and each of R 1 , R 4 and R 5 -R 14 is hydrogen.
8. A catalyst composition comprising the procatalyst of claim 1 ;
a cocatalyst; and
an activity limiting agent comprising an aliphatic mono-carboxylic acid ester.
9. The catalyst composition of claim 8 comprising an external electron donor comprising an alkoxysilane.
10. A procatalyst composition comprising:
a combination of a magnesium moiety, a titanium moiety and an internal electron donor comprising a substituted phenylene aromatic diester having the structure (I)
wherein R 1 -R 14 are the same or different, each of R 1 -R 14 is selected from the group consisting of hydrogen, a substituted hydrocarbyl group having 1 to 20 carbon atoms, an unsubstituted hydrocarbyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a heteroatom, and combinations thereof;
two consecutive R groups in R 5 -R 9 are linked to form a cyclic structure; and
two consecutive R groups in R 10 -R 14 are linked to form a cyclic structure.
11. The procatalyst composition of claim 10 wherein the substituted phenylene aromatic diester has the structure (II)
and each of R 2 , R 4 , R 5 -R 7 and R 10 -R 12 is hydrogen.
12. The procatalyst composition of claim 10 wherein the substituted phenylene aromatic diester has the structure (III)
and each of R 2 , R 4 , R 5 , R 6 , R 9 , R 10 , R 11 , and R 14 is hydrogen.
13. A catalyst composition comprising the procatalyst of claim 10 ;
a cocatalyst; and
an activity limiting agent comprising an aliphatic mono-carboxylic acid ester.
14. The catalyst composition of claim 13 comprising an external electron donor comprising an alkoxysilane.