EP0014539A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Controlled tackiness in EPM/LDPE blends
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1980-01-23
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Granted: —
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Expires: 2000-01-23
Abstract
Abstract Compositions of matter are disclosed comprising plastic films prepared from blends of various ethylene polymers, such as polyethylene or copolymers of polyethylene, with copolymers of ethylene and propylenewhich have either (A) a molecular weight, as determined by their Mooney viscosity at 260°F., of less than about 50 and/or an ethylene content of less than about70%, or (B) a molecular weight, as determined by their Mooney viscosity at 260°F., of greater than about 50 and an ethylene content of greater than about 70 weight percent, and in which the blends have a degree of tackiness, as measured by the force required to separate a pair of films produced from these blends, of greater than about 10 millinewtons cm. Preferably, the disclosed blends utilize low density polyethylene in admixture with about 1 to 30 weight percent of the ethylene propylene copolymer, and the copolymer has a molecular weight distribution, as measured by GPC, of greater than about 10 MWw; MWn.
Inventors
- 👤 William Stuart Smith Jr.
- 👤 Zigmond Walter Wilchinsky
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 23:19
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
63 words
A plastic film comprising a blend of ethylene polymer and about 1 to 30 weight percent of a copolymer of ethylene and propylene said copolymer of ethylene and propylene characterized by: (A) a molecular weight as determined by its Mooney viscosity at 260°F of less than about 50; (B) an ethylene content of less than about 70%; or (C) both (A) and (B).
Claim 2
Dependent Claim
63 words
A plastic film comprising a blend of ethylene polymer and about 1 to 30 weight percent of a copolymer of ethylene and propylene said copolymer of ethylene and propylene characterized by: (A) a molecular weight as determined by its Mooney viscosity at 260°F of less than about 50; (B) an ethylene content of less than about 70%; or (C) both (A) and (B).
Claim 3
Dependent Claim
15 words
A plastic film according to claim 1 characterized in that said ethylene polymer comprises polyethylene.
Claim 4
Dependent Claim
16 words
A plastic film according to claim 2 characterized in that said polyethylene comprises low density polyethylene.
Claim 5
Dependent Claim
30 words
A plastic film according to claim 1 characterized in that said polyethylene comprises a copolymer of ethylene with a monoolefinic comonomer having from 3 to 12 carbon atoms per molecule.
Claim 6
Dependent Claim
18 words
A plastic film according to claim 4 characterized by up to about 50 weight percent of said comonomer.
Claim 7
Dependent Claim
29 words
A plastic film according to claims 1-5 characterized in that said ethylene propylene copolymer has a molecular weight distribution of greater than about 10 MW w /MW n .
Claim 8
Dependent Claim
48 words
A plastic film according to claims 1-5 characterized in that said copolymer of ethylene and propylene includes a combination of properties (A) and (B), and further wherein said copolymer of ethylene and propylene has a molecular weight distribution of less than about 10 MW w /MW n .
Claim 9
Dependent Claim
21 words
A plastic film according to claims 1-7 characterized in that said blend is substantially free of any anti-block or slip agents.
Claim 10
Dependent Claim
26 words
A plastic film according to claims 1-8 characterized in that said copolymer of ethylene and propylene comprises a terpolymer of ethylene propylene and a non-conjugated diene.
Claim 11
Dependent Claim
20 words
A plastic film according to claims 1-9 characterized in that the molecular weight in (A) is less than about 30.
Claim 12
Dependent Claim
93 words
A plastic film comprising a blend of ethylene polymer and a copolymer of ethylene and propylene, said copolymer of ethylene and propylene characterized by a molecular weight, as determined by its Mooney viscosity at 260°F, of greater than about 50 a molecular weight distribution of greater than about 10 MW w /MW n and an ethylene content of greater than about 70%, said mixture further characterized by a degree of tackiness as measured by the force required tp separate a pair of said plastic films of greater than about 1Q millinewtons per centimeter.
Claim 13
Dependent Claim
93 words
A plastic film comprising a blend of ethylene polymer and a copolymer of ethylene and propylene, said copolymer of ethylene and propylene characterized by a molecular weight, as determined by its Mooney viscosity at 260°F, of greater than about 50 a molecular weight distribution of greater than about 10 MW w /MW n and an ethylene content of greater than about 70%, said mixture further characterized by a degree of tackiness as measured by the force required tp separate a pair of said plastic films of greater than about 1Q millinewtons per centimeter.
Claim 14
Dependent Claim
21 words
A plastic film according to claim 11 characterized in that said ethylene polymer is high density polyethylene on low density polyethylene.
Claim 15
Dependent Claim
28 words
A plastic film according to claim 11 or 12 characterized in that said copolymer of ethylene and propylene comprises a terpolymer of ethylene, propylene and a non-conjugated diene.
References Cited (Backward Citations)
No citation records indexed.
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