US4419475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant ethylene-propylene rubber with improved tensile properties and insulated conductor product thereof
Assignee: Vulkor Inc
•
Filing: 1981-08-03
•
Granted: 1983-12-06
•
Expires: 2001-08-03
Abstract
Abstract A cross-link curable ethylene-propylene rubber composition with improved tensile and related properties and resistance to heat, the cured rubber composition and electrical conductors indulated with said cured rubber composition. The improved rubber composition comprises a combination of ethylene-propylene rubber, chlorosulfonated polyethylene, finyl silane, antimony oxide, peroxide and a combination of antioxidants, zinc oxide, talc and carbon black in particular proportions.
Inventors
- 👤 Joseph E. Vostovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:42
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; H01B7/00; H01B7/17; H01B7/29; H01B7/292; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/296; Y10T428/2962
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
A curable ethylene-propylene rubber composition having improved tensile and related physical properties, resistance to heat and apt electrical and physical properties, consisting essentially of the combination in approximate parts by weight of: ______________________________________
Ethylene-propylene rubber
100
Chlorosulfonated polyethylene
3-10
Zinc Oxide 15-30
Talc 50-125
Vinyl silane 0.5-3
Carbon black 10-32
Antimony oxide 3-10
Amine antioxidant 1-4
Imidazole antioxidant
0.2-4
Peroxide curing agent
2-8
Curing coagent 2-5
______________________________________
Claim 2
Dependent Claim
67 words
A curable ethylene-propylene rubber composition having improved tensile and related physical properties, resistance to heat and apt electrical and physical properties, consisting essentially of the combination in approximate parts by weight of: ______________________________________
Ethylene-propylene rubber
100
Chlorosulfonated polyethylene
3-10
Zinc Oxide 15-30
Talc 50-125
Vinyl silane 0.5-3
Carbon black 10-32
Antimony oxide 3-10
Amine antioxidant 1-4
Imidazole antioxidant
0.2-4
Peroxide curing agent
2-8
Curing coagent 2-5
______________________________________
Claim 3
Dependent Claim
12 words
The crosslink cured product of the ethylene-propylene rubber composition of claim 1.
Claim 4
Dependent Claim
10 words
A cable insulated with the cured product of claim 2.
Claim 5
Dependent Claim
68 words
A curable eethylene-propylene rubber composition having improved tensile and related physical properties, resistance to heat and apt electrical and physical properties, consisting essentially of the combination in approximate parts by weight of: ______________________________________
Ethylene-propylene rubber
100
Chlorosulfonated polyethylene
3-10
Zinc Oxide 15-30
Talc 50-125
Vinyl silane 0.5-3
Carbon black 10-32
Antimony trioxide 3-10
Amine antioxidant 1-4
Imidazole antioxidant
0.2-4
Dicumyl peroxide curing agent
2-8
Curing coagent 2-5
______________________________________
Claim 6
Dependent Claim
68 words
A curable eethylene-propylene rubber composition having improved tensile and related physical properties, resistance to heat and apt electrical and physical properties, consisting essentially of the combination in approximate parts by weight of: ______________________________________
Ethylene-propylene rubber
100
Chlorosulfonated polyethylene
3-10
Zinc Oxide 15-30
Talc 50-125
Vinyl silane 0.5-3
Carbon black 10-32
Antimony trioxide 3-10
Amine antioxidant 1-4
Imidazole antioxidant
0.2-4
Dicumyl peroxide curing agent
2-8
Curing coagent 2-5
______________________________________
Claim 7
Dependent Claim
12 words
The crosslink cured product of the ethylene-propylene rubber composition of claim 4.
Claim 8
Dependent Claim
10 words
A cable insulated with the cured composition of claim 5.
References Cited (Backward Citations)
US2888424A
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US4069190A
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |