US3919358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polymer blends of (1) EPDM having a high degree of unstretched crystallinity with (2) polyethylene
Assignee: Goodrich Corp
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Filing: 1974-08-02
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Granted: 1975-11-11
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Expires: 1994-08-02
Abstract
Abstract EPDM polymers having a high degree of unstretched crystallinity are physically blended with polyethylene polymers. The blends exhibit superior tensile strength, better than that predicted from their additive individual effects. The thermoplastic polymer blends are useful to prepare molded products, tubing, liners, and like products.
Inventors
- 👤 Martin Batiuk
- 👤 Richard M Herman
- 👤 James C Healy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:49
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
A THERMOPLASTIC POLYMER BLEND COMPRISING (1) AN EPDM POLYMER CONSISTING ESSENTIALLY OF INTERPOLYMERIZED UNITS OF ABOUT 65 PERCENT TO ABOUT 85 PERCENT BE WEIGHT OF ETHYLENE, ABOUT 5 PERCENT TO ABOUT 35 PERCENT BY WEIGHT OF PROPYLENE, AND ABOUT 0.2 PERCENT TO ABOUT 10 PERCENT BY WEIGHT OF A DIENE MONOMER, SAID EPDM POLYMER HAVING A WEIGHT PERCENT UNSTRETCHED CRYSTALLINITY OF FROM ABOUT 10 PERCENT TO ABOUT 20 PERCENT BY WEIGHT OF THE POLYMER AND A MELT ENDOTHERM VALUE OF ABOUT 6 TO ABOUT 10 CALORIES PER GRAM AND (2) FROM ABOUT 5 PARTS TO ABOUT 200 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF THE EPDM POLYMER, OF A POLYETHYLENE POLYME.
Claim 2
Dependent Claim
113 words
A THERMOPLASTIC POLYMER BLEND COMPRISING (1) AN EPDM POLYMER CONSISTING ESSENTIALLY OF INTERPOLYMERIZED UNITS OF ABOUT 65 PERCENT TO ABOUT 85 PERCENT BE WEIGHT OF ETHYLENE, ABOUT 5 PERCENT TO ABOUT 35 PERCENT BY WEIGHT OF PROPYLENE, AND ABOUT 0.2 PERCENT TO ABOUT 10 PERCENT BY WEIGHT OF A DIENE MONOMER, SAID EPDM POLYMER HAVING A WEIGHT PERCENT UNSTRETCHED CRYSTALLINITY OF FROM ABOUT 10 PERCENT TO ABOUT 20 PERCENT BY WEIGHT OF THE POLYMER AND A MELT ENDOTHERM VALUE OF ABOUT 6 TO ABOUT 10 CALORIES PER GRAM AND (2) FROM ABOUT 5 PARTS TO ABOUT 200 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF THE EPDM POLYMER, OF A POLYETHYLENE POLYME.
Claim 3
Dependent Claim
66 words
A thermoplastic polymer blend of claim 1 wherein the EPDM polymer consists essentially of interpolymerized units of from about 70 percent to about 80 percent by weight of ethylene, about 15 percent to about 29 percent by weight of propylene, and about 1 percent to about 5 percent by weight of a nonconjugated diene monomer containing from 5 to about 25 carbon atoms in the monomer.
Claim 4
Dependent Claim
16 words
A thermoplastic polymer blend of claim 2 wherein the nonconjugated diene monomEr is an alkenyl norbornene.
Claim 5
Dependent Claim
32 words
A thermoplastic polymer blend of claim 2 wherein the polyethylene polymer is present in from about 10 parts to about 100 parts by weight per 100 parts by weight of EPDM polymer.
Claim 6
Dependent Claim
24 words
A thermoplastic polymer blend of claim 4 wherein the polyethylene polymer is a low density polyethylene having a density of below about 0.94 gram/cc.
Claim 7
Dependent Claim
32 words
A thermoplastic polymer blend of claim 5 wherein the EPDM polymer consists essentially of interpolymerized units of ethylene, propylene, and 5-ethylidene-2-norbornene monomers and the polyethylene has a density of about 0.92 gram/cc.
Claim 8
Dependent Claim
72 words
A thermoplastic polymer blend of claim 6 comprising (1) an EPDM polymer consisting essentially of interpolymerized units of about 73 percent by weight of ehtylene, about 23 percent by weight of propylene, and about 4 percent by weight of 5-ethylidene-2-norbornene, and (2) from about 10 parts to about 100 parts by weight per 100 parts by weight of the EPDM polymer, of a polyethylene polymer having a density of about 0.92 gram/cc.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |