# US 11,993,700 B2 · Catalyst system for the production of polyolefins and method of making and using same

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- Number: US 11,993,700 B2
- Document ID: US11993700B2
- Status: Granted
- Kind: B2
- Application number: 17/561,234
- Filed: 2021-12-23
- Published: 2022-04-21
- Granted: 2024-05-28
- Earliest claimed: 2016-08-30
- Assignees: W.R. Grace & Co.-Conn.
- Applicants: W.R. Grace & Co.-CONN.
- Inventors: Jan Willem van Egmond
- Web page: https://patentgrep.com/patent/US11993700B2

## CPC

- C08L 23/12: Polypropene
- C08F 10/06: Propene
- C08F 110/06: Propene
- C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers
- C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers
- C09D 123/12: Polypropene
- H01G 2/10: Housing; Encapsulation
- C08F 2410/01: Additive used together with the catalyst, excluding compounds containing Al or B
- C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)

## Abstract

Catalyst systems for polymerization of mixtures comprising an olefin include a selectivity control agent comprising at least one silicon-containing compound containing at least one C1-C10 alkoxy group bonded to a silicon atom and an amount of one or more agent compounds. The agent compound comprises C2-C13 mono- or polycarboxylic esters of aliphatic C2-C7 carboxylic acids and inertly substituted derivatives thereof. One or more polymerization catalysts may also be present. A polymerization process includes contacting an olefin or a mixture of the olefin and one or more copolymerizable comonomers under polymerization conditions with the catalyst composition.

## Claims

### Claim 1

A composition comprising a propylene homopolymer and a C2-C13 mono- or polycarboxylic ester of aliphatic C2-C7 carboxylic acids and inertly substituted derivatives thereof, wherein the composition has a melt flow greater than 100 g/10 min, as measured in accordance with ASTM D-1238-01 at 230° C. with a 2.16 kg weight of propylene based polymers.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the composition has a VOC content less than 80 ppm, as measured in accordance with VW standard PV 3341.

### Claim 3 (depends on 1)

The composition of claim 1, wherein the composition has a VOC content less than 25 ppm, as measured in accordance with VW standard PV 3341, and a melt flow less than 10 g/10 min, as measured in accordance with ASTM D-1238-01 at 230° C. with a 2.16 kg weight of propylene based polymers.

### Claim 4

A propylene impact copolymer composition comprising:
a propylene-based polymer;
a propylene/ethylene copolymer dispersed within the propylene-based polymer; and
a C2-C13 mono- or polycarboxylic ester of aliphatic C2-C7 carboxylic acids and inertly substituted derivatives thereof, wherein the composition has a melt flow greater than 50 g/10 min, as measured in accordance with ASTM D-1238-01 at 230° C. with a 2.16 kg weight of propylene based polymers.

### Claim 5 (depends on 4)

The composition of claim 4, wherein the composition has a VOC content less than 30 ppm, as measured in accordance with VW standard PV 3341.

### Claim 6 (depends on 4)

A polymerization process comprising:
contacting, under polymerization conditions, propylene with a catalyst composition comprising a C2-C13 mono- or polycarboxylic ester of aliphatic C2-C7 carboxylic acids and inertly substituted derivatives thereof in a first polymerization reactor;
forming an active propylene-based polymer;
contacting, under polymerization conditions, the active propylene-based polymer with at least one olefin in a second polymerization reactor; and
forming the composition of claim 4.

### Claim 7 (depends on 1)

An article comprising the composition of claim 1.

### Claim 8 (depends on 4)

An article comprising the polypropylene impact copolymer of claim 4.