Catalyst system for the production of polyolefins and method of making and using same
AssigneeW.R. Grace & Co.-Conn.
InventorJan Willem van Egmond
Life of this patent
Estimating the term…
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.
Claims18
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 activity limiting agent compounds, said activity limiting agent compound comprising a propanoate ester, a butyrate ester, a valerate ester, a hexanoate ester, combinations thereof, 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 activity limiting agent compounds, said activity limiting agent compound comprising a propanoate ester, a butyrate ester, a valerate ester, a hexanoate ester, combinations thereof, and inertly substituted derivatives thereof.
Dependencies are inferred from the claim text.