US4303574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant ethylene-propylene rubber with improved tensile properties and insulated conductor product thereof
Assignee: Vulkor Inc
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Filing: 1980-11-20
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Granted: 1981-12-01
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Expires: 2000-11-20
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
2026-10-27 13:34
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/292; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K5/00; C08K5/04; C08K5/14; C08K5/16; C08K5/17; C08K5/34; C08K5/3412; C08K5/54; C08K5/541; C08K5/5425; C08K5/59; C08L; C08L23/00; C08L23/02; C08L23/16; C08L23/26; C08L23/32; C08L23/34; C08L61/00; C08L9/00; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C08L2205/00; C08L2205/02; C08L2205/025; C08L2205/03; C08L2205/035; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/04; 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
75 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 Talc-hydrated magnesium silicate 50-125 Vinyl silane 0.5-3 Thermal carbon black 10-32 Reaction product of acetone and diphenylamine 1-2.5 Zinc salt of 2-mercaptotolylimidazole 0.2-3 Chlorosulfonated polyethylene 3-10 Antimony trioxide 3-10 Zinc oxide 15-25 Dicumyl peroxide curing agent 2-8 Polybutadiene homopolymer 2-5
Claim 2
Dependent Claim
75 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 Talc-hydrated magnesium silicate 50-125 Vinyl silane 0.5-3 Thermal carbon black 10-32 Reaction product of acetone and diphenylamine 1-2.5 Zinc salt of 2-mercaptotolylimidazole 0.2-3 Chlorosulfonated polyethylene 3-10 Antimony trioxide 3-10 Zinc oxide 15-25 Dicumyl peroxide curing agent 2-8 Polybutadiene homopolymer 2-5
Claim 3
Dependent Claim
6 words
The cured composition of claim 1.
Claim 4
Dependent Claim
10 words
A cable coated with the cured composition of claim 1.
Claim 5
Dependent Claim
80 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 copolymer 50. Ethylene-propylene-diene-terpolymer 50. Talc-hydrated magnesium silicate 76. Vinyl silane 0.77 Medium thermal carbon black 30.4 Reaction product of acetone and diphenylamine 2. Zinc salt of 2-mercaptotolylimidazole 0.5 Chlorosulfonated polyethylene 5. Antimony trioxide 5. Zinc oxide 20.8 Dicumyl peroxide curing agent 98-100% active 4.71 Polybutadiene homopolymer 3.
Claim 6
Dependent Claim
80 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 copolymer 50. Ethylene-propylene-diene-terpolymer 50. Talc-hydrated magnesium silicate 76. Vinyl silane 0.77 Medium thermal carbon black 30.4 Reaction product of acetone and diphenylamine 2. Zinc salt of 2-mercaptotolylimidazole 0.5 Chlorosulfonated polyethylene 5. Antimony trioxide 5. Zinc oxide 20.8 Dicumyl peroxide curing agent 98-100% active 4.71 Polybutadiene homopolymer 3.
Claim 7
Dependent Claim
6 words
The cured product of claim 4.
Claim 8
Dependent Claim
10 words
A cable coated with the cured product of claim 5.
References Cited (Backward Citations)
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US3079370A
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US3214422A
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US4069190A
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US4133936A
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US4125509A
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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) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |