Patent US4088713A successfully refreshed from Google Patents.
US4088713A
Expired / Lapsed
US
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Thermoplastic polymer blends comprising EPDM and EP
Assignee: Goodrich Corp
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Filing: 1977-06-30
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Granted: 1978-05-09
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Expires: 1997-06-30
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-propylene (EP) polymer, and (3) optionally, at least one polyethylene. The EPDM and EP polymers each have ethylene content, unstretched crystallinity, and Mooney viscosity within a specific range. 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, 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
2026-11-07 21:12
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/24; C08K3/26; C08K5/00; C08K5/0008; C08K5/0025; C08L23/04; C08L23/06; C08L91/00; C08L2205/00; C08L2205/03; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
158 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 1 wt.% to about 15 wt.% of a diene monomer, said EPDM polymer having an unstretched crystallinity from about 1 to about 20 wt.% based upon EPDM polymer weight, and a Mooney viscosity from about 25 to about 110 (ML 1+8 at 125° C.), and (2) from about 5 weight parts to 500 weight parts of at least one ethylene-propylene (EP) polymer consisting essentially of interpolymerized units of about 63 wt.% to about 85 wt.% ethylene, and about 15 wt.% to about 37 wt.% propylene, said EP polymer having an unstretched crystallinity from about 1 to about 20 wt.% based upon EP polymer weight, and a Mooney viscosity from about 25 to about 110 (ML 1+8 at 125° C.).
Claim 2
Dependent Claim
158 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 1 wt.% to about 15 wt.% of a diene monomer, said EPDM polymer having an unstretched crystallinity from about 1 to about 20 wt.% based upon EPDM polymer weight, and a Mooney viscosity from about 25 to about 110 (ML 1+8 at 125° C.), and (2) from about 5 weight parts to 500 weight parts of at least one ethylene-propylene (EP) polymer consisting essentially of interpolymerized units of about 63 wt.% to about 85 wt.% ethylene, and about 15 wt.% to about 37 wt.% propylene, said EP polymer having an unstretched crystallinity from about 1 to about 20 wt.% based upon EP polymer weight, and a Mooney viscosity from about 25 to about 110 (ML 1+8 at 125° C.).
Claim 3
Dependent Claim
52 words
A thermoplastic polymer blend of claim 1 wherein 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 in the monomer.
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 EP 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 2 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
15 words
A thermoplastic polymer blend of claim 7 wherein the nonconjugated diene is an alkenyl norbornene.
Claim 10
Dependent Claim
13 words
A thermoplastic polymer blend of claim 8 wherein the alkenyl norbornene is 5-ethylidene-2-norbornene.
Claim 11
Dependent Claim
28 words
A thermoplastic polymer blend of claim 7 wherein from about 20 to about 300 weight parts of EP polymer is used per 100 weight parts of EPDM polymer.
Claim 12
Dependent Claim
13 words
A thermoplastic polymer blend of claim 7 wherein the nonconjugated diene is 1,4-hexadiene.
References Cited (Backward Citations)
US3468979A
Cited
US3682767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |