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US4303571A
Expired / Lapsed
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Film-forming thermoplastic elastomeric polymer compositions
Assignee: Advanced Elastomer Systems LP
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Filing: 1980-01-17
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Granted: 1981-12-01
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Expires: 2000-01-17
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 S. Jansen
- 👤 Robert C. Puydak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:53
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
132 words
A film-forming thermoplastic elastomeric blend composition consisting essentially of 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
132 words
A film-forming thermoplastic elastomeric blend composition consisting essentially of 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
37 words
The composition of claim 1 further comprising (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
9 words
A film produced from the composition of claim 1.
Claim 5
Dependent Claim
14 words
A film produced from the composition of claim 1 by the blown-bubble extrusion method.
Claim 6
Dependent Claim
18 words
A film produced from the composition of claim 1 by the cast or chill roll film extrusion method.
Claim 7
Dependent Claim
16 words
A film according to claim 4 having an Elastic Modulus of about 250 to 400 psi.
Claim 8
Dependent Claim
13 words
The composition of claim 1 wherein said (a) component is an EPM elastomer.
Claim 9
Dependent Claim
18 words
The composition of claim 1 wherein said (a) component is an EPDM elastomer, the diene being ethylidene norbornene.
Claim 10
Dependent Claim
21 words
The composition of claim 1 wherein said (b) component has a vinyl acetate content of about 14% to 18% by weight.
Claim 11
Dependent Claim
17 words
The composition of claim 1 wherein said (c) component is an aromatic or highly aromatic hydrocarbon oil.
Claim 12
Dependent Claim
12 words
The composition of claim 2 wherein said (e) component is stearic acid.
Claim 13
Dependent Claim
61 words
The composition of claim 1 wherein 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 14
Dependent Claim
62 words
The composition of claim 2 wherein 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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |