# US 9,434,796 B2 · Catalyst composition with alkoxyalkyl ester internal electron donor and polymer from same

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- Number: US 9,434,796 B2
- Document ID: US9434796B2
- Status: Granted
- Kind: B2
- Application number: 13/996,322
- Filed: 2011-12-01
- Published: 2013-10-31
- Granted: 2016-09-06
- Earliest claimed: 2010-12-21
- Assignees: W. R. Grace & Co.-Conn.
- Applicants: Linfeng Chen; Kelly Gonzalez
- Inventors: Linfeng Chen; Kelly Gonzalez
- Web page: https://patentgrep.com/patent/US9434796B2

## CPC

- C08F 10/06: Propene
- C08F 110/06: Propene
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

Disclosed herein are catalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present catalyst compositions include an internal electron donor with a compounded alkoxyalkyl ester and optionally a mixed external electron donor. The present catalyst compositions improve catalyst selectivity, improve catalyst activity, and/or improve hydrogen response. Propylene-based polymer produced from the present catalyst composition has a melt flow rate greater than 10 g/10 min.

## Claims

### Claim 1

A polymerization process comprising:
(A) contacting, under polymerization conditions, propylene and optionally one or more comonomers with a catalyst composition comprising a procatalyst composition comprising a combination of a magnesium moiety, a titanium moiety and greater than 4.5 wt % of a compounded alkoxyalkyl ester;
a cocatalyst; and
an external electron donor; and
(B) forming a propylene-based polymer.

### Claim 2 (depends on 1)

The process of claim 1 wherein the catalyst composition comprises a mixed external electron donor (M-EED) comprising an activity limiting agent (ALA), a first selectivity control agent (SCA1), and a second selectivity control agent (SCA2), the process comprising
forming a propylene-based polymer comprising an alkoxyalkyl ester and having a melt flow rate greater than 10 g/10 min.

### Claim 3 (depends on 1)

The process of claim 1 comprising forming a propylene-based polymer having a melt flow rate greater than 100 g/10 min.

### Claim 4 (depends on 1)

The process of claim 1 wherein propylene-based polymer is selected from the group consisting of a propylene homopolymer and a propylene copolymer.

### Claim 5 (depends on 1)

The process of claim 1 wherein the alkoxyalkyl ester has the structure (I)
wherein R, R1 and R2 are the same or different each of R and R1 is selected from the group consisting of a C1-C20 primary alkyl group, a substituted C1-C20 primary alkyl group, and a C2-C20 alkene group; and
R2 is selected from the group consisting of hydrogen, a C1-C20 primary alkyl group, a substituted C1-C20 primary alkyl group, and a C2-C20 alkene group.

### Claim 6 (depends on 1)

The process of claim 1 wherein the alkoxyalkyl ester has the structure (III)
wherein R1 and R2 are the same or different, R1 is selected from the group consisting of a C1-C20 primary alkyl group, a substituted C1-C20 primary alkyl group, and a C2-C20 alkene group;
R2 is selected from the group consisting of hydrogen, a C1-C20 primary alkyl group, a substituted C1-C20 primary alkyl group, and a C2-C20 alkene group; and
R3, R4, R5 are the same or different, each of R3, R4, R5 is selected from the group consisting of a heteroatom, a C1-C20 hydrocarbyl group, a substituted C1-C20 hydrocarbyl group, and a C1-C20 hydrocarbyloxy group.

### Claim 7 (depends on 5)

The process of claim 5 wherein R1 and R2 are selected from a C2-C20 alkene group with the structure (II)
C(H)═C(R11)(R12) (II)
wherein R11 and R12 are the same or different, each of R11 and R12 is selected from the group consisting of hydrogen and a C1-C18 hydrocarbyl group.

### Claim 8 (depends on 7)

The process of claim 7 wherein the procatalyst composition comprises greater than 10 wt % of the alkoxyalkyl ester.

### Claim 9 (depends on 1)

The process of claim 1 comprising a mixed external electron donor (M-EED) comprising an activity limiting agent (ALA) and a selectivity control agent (SCA).

### Claim 10 (depends on 9)

The process of claim 9 comprising a mixed external electron donor (M-EED) comprising an activity limiting agent (ALA), a first selectivity control agent (SCA1), and a second selectivity control agent (SCA2).