Patent EP0032804A2 successfully refreshed from Google Patents.
EP0032804A2
Expired / Lapsed
EP
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Film-forming thermoplastic elastomeric polymer compositions
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1981-01-13
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Granted: —
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Expires: 2001-01-13
Abstract
Abstract There are disclosed film-forming polymer blends useful for the production of tubular blown film comprising EPM or EPDM elastomers, ethylene-vinyl acetate copolymers and a hydrocarbon oil plasticizer. The films exhibit resiliency and elasticity and high melt flow properties.
Inventors
- 👤 Deborah Suzanne Jansen
- 👤 Robert Chester Puydak
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 12:07
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/16; C08L91/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
130 words
A film-forming thermoplastic elastomeric blend composition characteirzed by a blend of: (a) about 25 to 55 parts by weight of an EPM or EPDM elastomer having an ethylene content of from about 55 to 70 weight percent; (b) about 35 to 55 parts by weight of a thermoplastic ethylene-vinyl acetate copolymer having a vinyl acetate content of about 9 to 40% by weight; and (c) about 15 to 25 parts by weight of a normally liquid hydrocarbon process oil, the oil being an aromatic, highly aromatic, naphthenic or paraffinic process or extender oil, the blend composition containing at least 4.5% by weight vinyl acetate based upon the total weight of the blend composition and the blend composition having a melt index at 190°C of about 0.5 to 15 gm./10 min.
Claim 2
Dependent Claim
130 words
A film-forming thermoplastic elastomeric blend composition characteirzed by a blend of: (a) about 25 to 55 parts by weight of an EPM or EPDM elastomer having an ethylene content of from about 55 to 70 weight percent; (b) about 35 to 55 parts by weight of a thermoplastic ethylene-vinyl acetate copolymer having a vinyl acetate content of about 9 to 40% by weight; and (c) about 15 to 25 parts by weight of a normally liquid hydrocarbon process oil, the oil being an aromatic, highly aromatic, naphthenic or paraffinic process or extender oil, the blend composition containing at least 4.5% by weight vinyl acetate based upon the total weight of the blend composition and the blend composition having a melt index at 190°C of about 0.5 to 15 gm./10 min.
Claim 3
Dependent Claim
40 words
A composition according to claim 1 further characterized by (d) about 0 to 30 parts by weight of calcium carbonate filler and (e) - about 0.5 to 2.0% by weight of a film processing abherent based on the total composition.
Claim 4
Dependent Claim
18 words
A composition according to claims 1 or 2 characterized in that said (a) component is an EPM elastomer.
Claim 5
Dependent Claim
24 words
A composition according to claims 1 or 2 characterized in that said (a) component is an EPDM elastomer, and the diene is ethylidene norbornene.
Claim 6
Dependent Claim
24 words
A composition according to claims 1-4 characterized in that said (b) component has a vinyl acetate content of about 14% to 18% by weight.
Claim 7
Dependent Claim
19 words
A composition according to claims 1-5 characterized in that (c) component is an aromatic or highly aromatic hydrocarbon oil.
Claim 8
Dependent Claim
15 words
A composition according to claims 2-6 characterized in that said (e) component is stearic acid.
Claim 9
Dependent Claim
67 words
A composition according to any of the preceding claims characterized in that there is present about 25 to 30 parts by weight of said (a) component; about 45 to 55 parts by weight of said (b) component; about 18 to 22 parts by weight of said (c) component; and further comprising about 1% by weight of stearic acid based on the total weight of the blend composition.
Claim 10
Dependent Claim
68 words
A composition according to any of the preceding claims characterized in that there is present about 20 to 25 parts by weight of said (a) component; about 15 to 20 parts by weight of said (b) component; about 25 to 40 parts by weight of said (c) component; about 20 to 25 parts by weight of said (d) component and about 1% by weight of said (e) component.
Claim 11
Dependent Claim
17 words
A film characterized in that it is produced from the composition of any of the preceding claims.
Claim 12
Dependent Claim
22 words
A film characterized in that it is produced from the composition of any of the preceding claims by the blown-bubble extrusion method.
Claim 13
Dependent Claim
26 words
A film characterized in that it is produced from the composition of any of the preceding claims by the cast or chill roll film extrusion method.
Claim 14
Dependent Claim
20 words
A film according to claim 11 characterized in that it has an Elastic Modulus of about 250 to 400 psi.
References Cited (Backward Citations)
No citation records indexed.
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