US4036912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polymer blends of EP or EPDM polymer with crystalline polypropylene
Assignee: Goodrich Corp
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Filing: 1975-10-06
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Granted: 1977-07-19
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Expires: 1995-10-06
Abstract
Abstract EP or EPDM polymers having a high ethylene content and a high ratio of ethylene units in runs of three or more to isolated ethylene units in the polymer are physically blended with crystalline polypropylene. The blends exhibit good tensile strength and modulus, and are useful to prepare molded products, tubing, liners, and like products.
Inventors
- 👤 Paul Thomas Stricharczuk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:15
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L23/16; C08L2205/00; C08L2205/03; C08L91/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
A thermoplastic polymer blend comprising (1) a polymer consisting essentially of interpolymerized units of about 65 percent to about 85 percent by weight of ethylene, about 5 percent to about 35 percent by weight of propylene, and up to about 10 percent by weight of a diene monomer; said polymer having an ethylene sequence index of from about 30/1 to about 70/1 and a melt endotherm value of about 2 to about 15 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 crystalline polypropylene polymer.
Claim 2
Dependent Claim
102 words
A thermoplastic polymer blend comprising (1) a polymer consisting essentially of interpolymerized units of about 65 percent to about 85 percent by weight of ethylene, about 5 percent to about 35 percent by weight of propylene, and up to about 10 percent by weight of a diene monomer; said polymer having an ethylene sequence index of from about 30/1 to about 70/1 and a melt endotherm value of about 2 to about 15 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 crystalline polypropylene polymer.
Claim 3
Dependent Claim
63 words
A thermoplastic polymer blend of claim 1 wherein the polymer consists essentially of interpolymerized units of from about 70 percent to about 80 percent by weight of ethylene, about 15 percent to about 30 percent by weight of propylene, and up 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
33 words
A thermoplastic polymer blend of claim 2 wherein the crystalline polypropylene polymer is present in from about 25 parts to about 100 parts by weight per 100 parts by weight of the polymer.
Claim 5
Dependent Claim
68 words
A thermoplastic polymer blend of claim 3 wherein the polymer consists essentially of interpolymerized units of from about 70 percent to about 80 percent by weight of ethylene and about 20 percent to about 30 percent by weight of propylene, said polymer having an ethylene sequence index of from about 35/1 to about 50/1 and having a melt endotherm value of from about 4 to about 10 calories/gram.
Claim 6
Dependent Claim
64 words
A thermoplastic polymer blend of claim 4 comprising (1) a polymer consisting essentially of interpolymerized units of about 70 percent by weight of ethylene and about 30 percent by weight of propylene, and (2) from about 25 parts to about 100 parts by weight per 100 parts by weight of the polymer of a crystalline polypropylene polymer having a density of about 0.90 gram/cc.
Claim 7
Dependent Claim
83 words
A thermoplastic polymer blend of claim 3 wherein the polymer consists essentially of interpolymerized units of from about 70 percent to about 80 percent by weight of ethylene, from about 15 percent to about 29 percent by weight of propylene, and from about 1 percent to about 5 percent by weight of alkenyl norbornene monomers, said polymer having an ethylene sequence index of from about 35/1 to about 50/1 and having a melt endotherm value of from about 4 to about 10 calories/gram.
Claim 8
Dependent Claim
71 words
A thermoplastic polymer blend of claim 6 comprising (1) a polymer consisting essentially of interpolymerized units of about 73 percent by weight of ethylene, about 23 percent by weight of propylene, and about 4 percent by weight of 5-ethylidene-2-norbornene, and (2) from about 25 parts to about 100 parts by weight per 100 parts by weight of the polymer, of a crystalline polypropylene polymer having a density of about 0.90 gram/cc.
References Cited (Backward Citations)
US3904470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |