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US 2024/0174778 A1Published application
High density polyethylene composition
AssigneeNOVA Chemicals (International) S.A.
InventorsCéline Bellehumeur, Sepideh Kasiri
Life of this patent
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Abstract
A polyethylene composition has a density of ≥0.945 g/cm3, a melt index. I2 of from 0.8 to 4.0 g/10 min. an environmental stress crack resistance, an ESCR of greater than 400 hours as determined by ASTM D1693 in 100% IGEPAL CO-630 under conditions A or B. and a melt strength of ≥3.0 cN.
Claims38
A polyethylene composition comprising:
- (i) from 5 to 50 weight % of first ethylene copolymer having a weight average molecular weight, Mw of >200,000 g/mol;
- and
- (ii) from 95 to 50 weight % of a second ethylene copolymer;
- wherein the first ethylene copolymer has a higher weight average molecular weight, Mw, than the second ethylene copolymer;
- wherein the first ethylene copolymer has a higher number of short chain branches per 1000 carbon atoms (SCB1) than the second ethylene copolymer (SCB2);
- wherein the polyethylene composition has a density of ≥0.945 g/cm3;
- a melt index, I2 of from 0.8 to 4.0 g/10 min;
- a melt flow ratio, I21/I2 of ≥50;
- a molecular weight distribution, Mw/Mn of <6.5;
- a Z-average molecular weight, Mz of ≥250,000 g/mol;
- a Z-average molecular weight distribution, Mz/Mw, of >2.5;
- a long chain branching factor, LCBF of >0.0010;
- and an environmental stress crack resistance, ESCR, of greater than 400 hours as determined by ASTM D1693 in 100% IGEPAL CO-630 under conditions A and B.
10 more elements
A polyethylene composition comprising:
- (i) from 5 to 50 weight % of first ethylene copolymer having a weight average molecular weight, Mw, of >200,000 g/mol;
- and
- (ii) from 95 to 50 weight % of a second ethylene copolymer;
- wherein the first ethylene copolymer has a higher weight average molecular weight, Mw than the second ethylene copolymer;
- wherein the first ethylene copolymer has a higher number of short chain branches per 1000 carbon atoms (SCB1) than the second ethylene copolymer (SCB2);
- wherein the polyethylene composition has a density of >0.945 g/cm3;
- a melt index, 12, of from 0.8 to 4.0 g/10 min;
- a melt flow ratio, I21/I2, of ≥50;
- a molecular weight distribution, Mw/Mn, of <6.5;
- a Z-average molecular weight, Mz, of ≥250,000 g/mol;
- a Z-average molecular weight distribution, Mz/Mw, of >2.5;
- a long chain branching factor, LCBF, of >0.0010;
- a composition distribution breadth index, CDBI50, of <50%;
- an Izod impact strength of >3.0 foot pounds per inch;
- and an environmental stress crack resistance, ESCR, of greater than 1000 hours as determined by ASTM D1693 in 100% IGEPAL CO-630 under conditions A and B.
12 more elements
A polyethylene composition comprising:
- (i) from 5 to 50 weight % of first ethylene copolymer having a weight average molecular weight, Mw, of >200,000 g/mol;
- and
- (ii) from 95 to 50 weight % of a second ethylene copolymer;
- wherein the first ethylene copolymer has a higher weight average molecular weight, Mw than the second ethylene copolymer;
- wherein the first ethylene copolymer has a higher number of short chain branches per 1000 carbon atoms (SCB1) than the second ethylene copolymer (SCB2);
- wherein the polyethylene composition has a density of ≥0.945 g/cm3;
- a melt index, 12, of from 0.8 to 4.0 g/10 min;
- a melt flow ratio, I21/I2, of ≥50;
- a molecular weight distribution, Mw/Mn, of <6.5;
- a Z-average molecular weight, Mz, of ≥250,000 g/mol;
- a Z-average molecular weight distribution, Mz/Mw, of >2.5;
- a long chain branching factor, LCBF, of >0.0010;
- a composition distribution breadth index, CDBI50, of >60%;
- an Izod impact strength of >1.5 foot pounds per inch;
- and an environmental stress crack resistance, ESCR, of greater than 400 hours as determined by ASTM D1693 in 100% IGEPAL CO-630 under conditions A and B.
12 more elements
Dependencies are inferred from the claim text.