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US 12,742,062 B2Granted
Bimodal polyethylene composition
AssigneeNOVA Chemicals (International) S.A.
InventorsCéline Bellehumeur, Sepideh Kasiri
Life of this patent
Estimating the term…
Abstract
A bimodal polyethylene composition has a density of from 0.940 to 0.949 g/cm3, a melt index, I2 of greater than 5 g/10 min and an environmental stress crack resistance, ESCR of greater than 1000 hours as determined by ASTM D1693 in 100% IGEPAL CO-630 under condition B. The bimodal polyethylene composition which comprises a first ethylene copolymer and a second ethylene copolymer is relatively easy to process and may be used to make molded articles.
Claims29
A bimodal polyethylene composition comprising:
- (i) from 10 to 60 weight percent of a first ethylene copolymer having a density of from 0.880 to 0.920 g/cm3, a molecular weight distribution, Mw/Mn of from 1.7 to 2.7, and a weight average molecular weight, Mw of from 100,000 to 250,000 g/mol;
- (ii) from 90 to 40 weight percent of a second ethylene copolymer having a density of from 0.945 to 0.965 g/cm3, a molecular weight distribution, Mw/Mn of from 1.7 to 2.3, and a weight average molecular weight, Mw of from 15,000 to 75,000 g/mol;
- wherein the bimodal polyethylene composition has a density of from 0.940 to 0.949 g/cm3;
- a melt index, I2 of greater than 5.0 g/10 min, a long chain branching factor, LCBF of greater than 0.0010, and an environmental stress crack resistance, ESCR as determined by ASTM D1693 in 100% branched ethoxylated nonylphenol under condition B of greater than 1000 hours.
1 more element
A rotomolded article prepared from a bimodal polyethylene composition comprising:
- (i) from 10 to 60 weight percent of a first ethylene copolymer having a density of from 0.880 to 0.920 g/cm3, a molecular weight distribution, Mw/Mn of from 1.7 to 2.7, and a weight average molecular weight, Mw of from 100,000 to 250,000 g/mol;
- (ii) from 90 to 40 weight percent of a second ethylene copolymer having a density of from 0.945 to 0.965 g/cm3, a molecular weight distribution, Mw/Mn of from 1.7 to 2.3, and a weight average molecular weight, Mw of from 15,000 to 75,000 g/mol;
- wherein the bimodal polyethylene composition has a density of from 0.940 to 0.949 g/cm3;
- a melt index, I2 of greater than 5.0 g/10 min, a long chain branching factor, LCBF of greater than 0.0010, and an environmental stress crack resistance, ESCR as determined by ASTM D1693 in 100% branched ethoxylated nonylphenol under condition B of greater than 1000 hours.
1 more element
A cap or closure prepared from a bimodal polyethylene composition comprising:
- (i) from 10 to 60 weight percent of a first ethylene copolymer having a density of from 0.880 to 0.920 g/cm3, a molecular weight distribution, Mw/Mn of from 1.7 to 2.7, and a weight average molecular weight, Mw of from 100,000 to 250,000 g/mol;
- (ii) from 90 to 40 weight percent of a second ethylene copolymer having a density of from 0.945 to 0.965 g/cm3, a molecular weight distribution, Mw/Mn of from 1.7 to 2.3, and a weight average molecular weight, Mw of from 15,000 to 75,000 g/mol;
- wherein the bimodal polyethylene composition has a density of from 0.940 to 0.949 g/cm3;
- a melt index, I2 of greater than 5.0 g/10 min, a long chain branching factor, LCBF of greater than 0.0010, and an environmental stress crack resistance, ESCR as determined by ASTM D1693 in 100% branched ethoxylated nonylphenol under condition B of greater than 1000 hours.
1 more element
A foamed article prepared from a bimodal polyethylene composition comprising:
- (i) from 10 to 60 weight percent of a first ethylene copolymer having a density of from 0.880 to 0.920 g/cm3, a molecular weight distribution, Mw/Mn of from 1.7 to 2.7, and a weight average molecular weight, Mw of from 100,000 to 250,000 g/mol;
- (ii) from 90 to 40 weight percent of a second ethylene copolymer having a density of from 0.945 to 0.965 g/cm3, a molecular weight distribution, Mw/Mn of from 1.7 to 2.3, and a weight average molecular weight, Mw of from 15,000 to 75,000 g/mol;
- wherein the bimodal polyethylene composition has a density of from 0.940 to 0.949 g/cm3;
- a melt index, I2 of greater than 5.0 g/10 min, a long chain branching factor, LCBF of greater than 0.0010, and an environmental stress crack resistance, ESCR as determined by ASTM D1693 in 100% branched ethoxylated nonylphenol under condition B of greater than 1000 hours.
1 more element
Dependencies are inferred from the claim text.