US4131654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polymer blends comprising EPDM, E/EA copolymer and optionally P.E.
Assignee: Goodrich Corp
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Filing: 1977-11-28
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Granted: 1978-12-26
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Expires: 1997-11-28
Abstract
Abstract Certain thermoplastic polymer blends have tensile strengths greater than that of any one polymer component. The blends comprise (1) at least one ethylene-propylene-diene (EPDM) polymer, (2) at least one ethylene-ethyl acrylate (EEA) polymer, and (3) optionally, at least one polyethylene. The blends are prepared by mixing physically the polymer components under heat and shear conditions. No curing or crosslinking agents are needed to obtain the superior tensile strengths of the thermoplastic blends. The blends are useful to prepare tubing, sheet products, wire and cable insulation, molded items and the like.
Inventors
- 👤 Richard M. Herman
- 👤 Martin Batiuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:58
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08L2205/00; C08L2205/03; C08L23/04; C08L23/06; C08L23/08; C08L23/0846; C08L23/0869
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
A thermoplastic polymer blend comprising (1) 100 weight parts of at least one EPDM polymer consisting essentially of interpolymerized units of about 63 wt.% to about 85 wt.% ethylene, about 5 wt.% to about 37 wt.% propylene, and about 0.2 wt.% to about 15 wt.% of a diene monomer, and (2) from about 5 weight parts to 500 weight parts of at least one ethylene-ethyl acrylate (EEA) polymer consisting essentially of interpolymerized units of about 60 wt.% to about 98 wt.% ethylene, and about 2 wt.% to about 40 wt.% ethyl acrylate.
Claim 2
Dependent Claim
92 words
A thermoplastic polymer blend comprising (1) 100 weight parts of at least one EPDM polymer consisting essentially of interpolymerized units of about 63 wt.% to about 85 wt.% ethylene, about 5 wt.% to about 37 wt.% propylene, and about 0.2 wt.% to about 15 wt.% of a diene monomer, and (2) from about 5 weight parts to 500 weight parts of at least one ethylene-ethyl acrylate (EEA) polymer consisting essentially of interpolymerized units of about 60 wt.% to about 98 wt.% ethylene, and about 2 wt.% to about 40 wt.% ethyl acrylate.
Claim 3
Dependent Claim
87 words
A thermoplastic polymer blend of claim 1 wherein (1) the EPDM polymer consists essentially of interpolymerized units of about 68 wt.% to 78 wt.% ethylene, 17 wt.% to 31 wt.% propylene, and 2 wt.% to ethylene, 17 wt.% to 31 wt.% propylene, and 2 wt.% to 10 wt.% of a nonconjugated diene monomer containing from 5 to about 25 carbon atoms, and (2) the EEA polymer consists essentially of interpolymerized units of about 70 wt.% to 95 wt.% ethylene, and 5 wt.% to 30 wt.% ethyl acrylate.
Claim 4
Dependent Claim
15 words
A thermoplastic polymer blend of claim 2 wherein the nonconjugated diene is an alkenyl norbornene.
Claim 5
Dependent Claim
13 words
A thermoplastic polymer blend of claim 3 wherein the alkenyl norbornene is 5-ethylidene-2-norbornene.
Claim 6
Dependent Claim
28 words
A thermoplastic polymer blend of claim 3 wherein from about 20 to about 300 weight parts of EEA polymer is used per 100 weight parts of EPDM polymer.
Claim 7
Dependent Claim
13 words
A thermoplastic polymer blend of claim 2 wherein the nonconjugated diene is 1,4-hexadiene.
Claim 8
Dependent Claim
32 words
A thermoplastic polymer blend of claim 1 wherein from about 5 weight parts to about 200 weight parts of at least one polyethylene is used per 100 weight parts of EPDM polymer.
Claim 9
Dependent Claim
76 words
A thermoplastic polymer blend of claim 7 wherein (1) the EPDM polymer consists essentially of interpolymerized units of about 68 wt.% to 78 wt.% ethylene, 17 wt.% to 31 wt.% propylene, and 2 wt.% to 10 wt.% of a nonconjugated diene monomer containing from 5 to about 25 carbon atoms, and (2) the EEA polymer consists essentially of interpolymerized units of about 70 wt.% to 95 wt.% ethylene, and 5 wt.% to 30 wt.% ethyl acrylate.
Claim 10
Dependent Claim
15 words
A thermoplastic polymer blend of claim 8 wherein the nonconjugated diene is an alkenyl norbornene.
Claim 11
Dependent Claim
13 words
A thermoplastic polymer blend of claim 9 wherein the alkenyl norbornene is 5-ethylidene-2-norbornene.
Claim 12
Dependent Claim
28 words
A thermoplastic polymer blend of claim 9 wherein from about 20 to about 300 weight parts of EEA polymer is used per 100 weight parts of EPDM polymer.
Claim 13
Dependent Claim
13 words
A thermoplastic polymer blend of claim 8 wherein the nonconjugated diene is 1,4-hexadiene.
References Cited (Backward Citations)
US3821333A
Cited
US3941859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |