EP0100843A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ethylene polymer blend
Assignee: Phillips Petroleum Co
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Filing: 1983-06-21
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Granted: —
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Expires: 2003-06-21
Abstract
Abstract Ethylene polymer blends of a high molecular weight ethylene polymer, preferably an ethylene-mono-1-olefin copolymer, and a low molecular weight ethylene polymer preferably an ethylene homopolymer, both preferably with narrow molecular weight distribution and low levels of long chain branching exhibit excellent film properties and good environmental stress crack behavior superior to that expected for polyethylene of comparable density and melt flow. These resins are useful for the manufacture of film or in blow molding techniques, the production of pipes and wire coating.
Inventors
- 👤 Fay Wallace Bailey
- 👤 William Michael Whitte
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 19:35
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L2205/00; C08L2205/02; C08L2205/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
57 words
Ethylene polymer blend comprising (a) 40-70 parts by weight of a high molecular weight ethylene polymer having a high load melt index (HLMI) in the range of 0.1 to 1.5 g/10 min, and (b) 60-30 parts by weight of a low molecular weight ethylene polymer having a melt index (MI) in the range of 45-300 g/10 minutes.
Claim 2
Dependent Claim
57 words
Ethylene polymer blend comprising (a) 40-70 parts by weight of a high molecular weight ethylene polymer having a high load melt index (HLMI) in the range of 0.1 to 1.5 g/10 min, and (b) 60-30 parts by weight of a low molecular weight ethylene polymer having a melt index (MI) in the range of 45-300 g/10 minutes.
Claim 3
Dependent Claim
20 words
The blend of claim 1 characterized in that both ethylene poly- mezs(a) and (b) have a narrow molecular weight distribution.
Claim 4
Dependent Claim
37 words
The blend of claim 1 or 2 characterized in that said polymer (a) is a polymer of ethylene and 0 to 30 weight percent mono-1-olefin having 3-10 carbon atoms, and said polymer (b) is an ethylene homopolymer.
Claim 5
Dependent Claim
24 words
The blend of any of claims 1 to 3 characterized in that neither polymer (a) nor polymer (b) has any substantial long chain branching.
Claim 6
Dependent Claim
62 words
The blend of any of claims 1 to 4 characterized in that polymer (a) has a high load melt index (HLMI) in the range of 0.2-0.6, the ethylene homopolymer (b) has a melt index (MI) of 100-300, the ethylene homopolymer (b) is essentially linear and polymer (a) is essentially linear and has essentially only short chain branching from the comonomer, if any.
Claim 7
Dependent Claim
48 words
The blend of any of claims 1 to 5 characterized in that said high molecular weight ethylene polymer (a) as a density in the range of 0.930 to 0.955 g/ml and said low molecular weight ethylene polymer has a density in the range of 0.945 to 0.975 g/ml.
Claim 8
Dependent Claim
38 words
Ethylene polymer blend comprising (a) a high molecular weight ethylene polymer randomly copolymerized from ethylene and 5 to 10 weight % of a mono-1-olefin of 4 to 8 carbon atoms, and (b) a low molecular weight ethylene homopolymer.
Claim 9
Dependent Claim
38 words
Ethylene polymer blend comprising (a) a high molecular weight ethylene polymer randomly copolymerized from ethylene and 5 to 10 weight % of a mono-1-olefin of 4 to 8 carbon atoms, and (b) a low molecular weight ethylene homopolymer.
Claim 10
Dependent Claim
54 words
A process for producing an ethylene polymer blend characterized by blending 40 to 70 parts by weight of a high molecular weight ethylene polymer (a) according to any of claims 1 to 7,and 60 to 30 parts by weight of a low molecular weight ethylene polymer according to any of claims 1 to 7.
Claim 11
Dependent Claim
28 words
The process of claim 8 characterized in that both ethylene polymers (a) and (b) are blended as polymer fluff to obtain a polymer fluff blend as the product.
Claim 12
Dependent Claim
37 words
A process for producing an ethylene polymer sheet comprising extruding a fluid ethylene polymer blend and forming the extruded blend into a sheet characterized by using the ethylene polymer blend of one of claims 1 to 7.
References Cited (Backward Citations)
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