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US 7,294,681 B2Granted
Mutliple catalyst system for olefin polymerization and polymers produced therefrom
AssigneeExxonMobil Chemical Patents Inc.
InventorsPeijun Jiang, Armenag Hagop Dekmezian, Jo Ann Marie Canich, Charles Lewis Sims, Ramin Abhari, Cesar Alberto Garcia-Franco, David Raymond Johnsrud
Life of this patent
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Abstract
This invention relates to a polymer of one or more C3 to C40 olefins, optionally one or more diolefins, and less than 15 mole % of ethylene, and polymerization processes for producing the same.
Claims20
A branched olefin polymer prepared from a continuous process comprising the steps of:
- 1) selecting a first catalyst component capable of producing a polymer having an Mw of 100,000 or less and a crystallinity of 5% or less under selected polymerization conditions;
- 2) selecting a second catalyst component capable of producing polymer having an Mw of 100,000 or less and a crystallinity of 20% or more at the selected polymerization conditions;
- 3) contacting the catalyst components in the presence of one or more activators with one or more C3 to C40 olefins;
- 4) at a temperature of greater than 100° C.;
- and
- 5) at a residence time of 120 minutes or less;
- 6) wherein the ratio of the first catalyst to the second catalyst is from 1:1 to 50:1;
- 7) wherein the activity of the catalyst components is at least 50 kilograms of polymer per gram of the catalyst compounds;
- and wherein at least 80% of the olefins are converted to polymer,
- wherein the polymer has the following properties:
- a) a Dot T-Peel of 1 Newton or more on Kraft paper;
- b) an Mw of 10,000 to 100,000;
- c) a branching index (g′) of 0.4-0.98 measured at the Mz of the polymer when the polymer has an Mw of 10,000 to 60,000, or
- a branching index (g′) of 0.4-0.95 measured at the Mz of the polymer when the polymer has an Mw of 10,000 to 100,000;
- and
- d) amorphous polymer segments and semi-crystalline polymer segments.
13 more elements
Dependencies are inferred from the claim text.