Polymer composition for use in blow moulding
AssigneeBasell Polyolefine GmbH
InventorsDiana Dotsch, Bernd Lothar Marczinke, Gerhardus Meier, Maclovio Herrera Salinas
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Abstract
A novel polymer composition is described comprising ethylene homopolymers and/or copolymers of ethylene with C3-C8-alpha-olefins which polymer composition has a density of from 0.940 to 0.949 g/cm3, a melt index (HLMI) according to DIN EN ISO 1133:2005, condition G at 190° C. and 21.6 kg, of from 3 to 7 g/10 min. and a Hostalen Long Chain Branching Index (HLCBI) of from 3 to 8, and which polymer composition is produced by polymerisation with one or more Ziegler catalysts in a series of at least two polymerization reactors. The new polymer composition can in particular be used for blow moulding of intermediate bulk containers.
Claims9
A polymer composition comprising:
- an ethylene homopolymer and/or a copolymer of ethylene and a C3-C8-alpha-olefin wherein the polymer composition has:
- (i) a density of from 0.940 to 0.949 g/cm3,
- (ii) a high load melt index from 3 to 7 g/10 min, as measured according to DIN EN ISO 1133:2005, condition G at 190° C. and 21.6 kg, and
- (iii) a Hostalen Long Chain Branching Index (HLCBI) from 3 to 8.
A method for producing a polymer composition comprising:
- (A) polymerizing a first reaction mixture comprising ethylene in a first reactor to produce a polymer A,
- wherein the reaction mixture is in the form of a suspension,
- wherein the polymer composition comprises:
- polymer A, wherein polymer A is an ethylene homopolymer and/or a copolymer of ethylene and a C3-C8-alpha-olefin, and
- wherein the polymer composition has:
- (i) a density of from 0.940 to 0.949 g/cm3,
- (ii) a high load melt index from 3 to 7 g/10 min, as measured according to DIN EN ISO 1133:2005, condition G at 190° C. and 21.6 kg, and
- (iii) a Hostalen Long Chain Branching Index (HLCBI) from 3 to 8.
Dependencies are inferred from the claim text.