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US 12,409,597 B2Granted
High density polyethylene for rigid articles
AssigneeNOVA Chemicals (International) S.A.
InventorsVinod Konaganti, Marcelo Yamane
Life of this patent
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Abstract
A composition comprising a high molecular weight, chromium catalyzed ethylene copolymer (also referred to as a polyethylene resin), a nucleating agent and zinc oxide.
Claims15
A blow molding composition comprising:
- A) a chromium catalyzed ethylene copolymer having:
- i) a high load melt index of 2 g/10 minutes to 10 g/10 minutes, as measured by ASTM 1238 at 190° C. using a 21.6 kg load;
- and
- ii) a density of from 0.944 to 0.955 g/cc;
- B) from 100 to 5000 ppm of a nucleating agent comprising a salt of hexahydrophthalic acid;
- and
- C) from 100 to 1000 ppm of zinc oxide.
4 more elements
A process of preparing a blow molded article, wherein said process comprises:
- I) preparing a parison from a blow molding composition comprising:
- A) a chromium catalyzed ethylene copolymer having
- i) a high load melt index of 2 g/10 minutes to 10 g/10 minutes, as measured by ASTM 1238 at 190° C. using a 21.6 kg load;
- ii) a density of from 0.944 to 0.955 g/cc;
- B) from 100 to 5000 ppm of nucleating agent;
- and
- C) from 100 to 1000 ppm of zinc oxide, and
- II) subjecting said parison to a blow molding process.
5 more elements
A blow molding composition comprising:
- A) a chromium-catalyzed high density polyethylene that exhibits:
- i) a high load melt index of 2 g/10 minutes to 10 g/10 minutes, as measured by ASTM 1238 at 190° C. using a 21.6 kg load;
- and
- ii) a density of from 0.944 to 0.955 g/cc;
- B) from 100 to 5000 ppm of a salt of hexahydrophthalic acid;
- and
- C) from 100 to 1000 ppm of zinc oxide.
4 more elements
Dependencies are inferred from the claim text.