Back to results
US 9,284,394 B2Granted
Polyethylene polymerisation in gas phase reactor
AssigneeBasell Polyolefine GmbH
InventorsFabiana Fantinel, Shahram Mihan, Gerhardus Meier, Ulf Schueller, Maclovio Herrera Salinas, Giampaolo Pellegatti, Gerd Mannebach
Life of this patent
Estimating the term…
Abstract
A novel gas phase polymerization method is devised, for polymerization of low and ultralow density polyethylene.
Claims11
A method of polymerizing a polyethylene copolymer composition
- (a) having a density of from 0.870 to 0.920 g/cm3,
- (b) comprising a C4-C12 α-olefin comonomer, and
- (c) being at least bimodal in comonomer distribution as determined by DSC analysis, comprising
- (c1) a low Mw HDPE component, having a melting temperature in the range from 126.5 to 130° C., and
- (c2) a high Mw plastomeric component, having a melting temperature in the range from 65 to 95° C.,
- which method comprises the step of polymerizing the polyethylene composition in a single polymerization step in the presence of a catalyst in a gas phase reactor.
3 more elements
Dependencies are inferred from the claim text.