Catalyst System For The Production Of Polyolefins And Method Of Making And Using Same
AssigneeW.R. Grace & Co.-Conn.
InventorJan Willem van Egmond
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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.
Claims35
A composition for use with a catalyst for polymerization of mixtures comprising an olefin, said composition comprising:
- 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, said agent compound comprising C2-C13 mono- or polycarboxylic esters of aliphatic C2-C7 carboxylic acids and inertly substituted derivatives thereof.
A catalyst composition for polymerization of mixtures comprising an olefin, said catalyst composition comprising:
- one or more polymerization catalysts;
- a selectivity control agent comprising at least one silicon-containing compound containing at least one C1-C10 alkoxy group bonded to a silicon atom;
- an amount of one or more agent compounds, said agent compound comprising C2-C13 mono- or polycarboxylic esters of aliphatic C2-C7 monocarboxylic acids and inertly substituted derivatives thereof.
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.
A polymerization process for producing a propylene-based polymer comprising:
- contacting, under polymerization conditions and in the presence of hydrogen, propylene and optionally one or more comonomers with a catalyst composition described herein,
- maintaining a H2/propylene mole ratio from 0.0005 to about 0.17 during the contacting;
- and
- forming a propylene-based polymer having a melt flow rate from 0.2 g/10 min to 400 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.
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.
An article comprising a polypropylene homopolymer comprising a C2-C13 mono- or polycarboxylic esters of aliphatic C2-C7 carboxylic acids and inertly substituted derivatives thereof.
An article comprising a polypropylene impact copolymer comprising one or more C2-C13 mono- or polycarboxylic esters of aliphatic C2-C7 carboxylic acids and inertly substituted derivatives thereof.
A catalyst composition as described herein.
A composition for use with a catalyst for polymerization as described herein.
A polymerization process as described herein.
Dependencies are inferred from the claim text.