Patent US4145475A successfully refreshed from Google Patents.
US4145475A
Expired / Lapsed
US
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Flame and heat resistant ethylene-propylene rubber and conductor product insulated therewith
Assignee: Vulkor Inc
•
Filing: 1978-07-17
•
Granted: 1979-03-20
•
Expires: 1998-07-17
Abstract
Abstract A crosslink curable ethylene-propylene rubber composition with improved resistance to flame and heat, the cured rubber composition and electrical conductors insulated with the cured rubber composition. The improved rubber composition comprises a combination of ethylene-propylene rubber, chlorosulfonated polyethylene, zinc oxide, hydrated alumina and amorphous silica in particular proportions.
Inventors
- 👤 Joseph E. Vostovich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:32
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; C08K3/36; C08K5/00; C08K5/0008; C08K5/0025; C08K5/04; C08K5/14; C08K5/54; C08L; C08L23/00; C08L23/02; C08L23/16; C08L23/26; C08L23/32; C08L23/34; C08L91/00; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; C08L2201/00; C08L2201/02; C08L2312/00; C08L2666/00; C08L2666/02; C08L2666/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/296; Y10T428/2962
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
95 words
An electrical conductor insulated with a cured etylene-propylene rubber having improved resistance to flame and heat and having apt electrical and physical properties, consisting essentially of a metal conductor having thereon an insulating composition of the crosslink cured product, in approximate parts by weight, of: ______________________________________
Ethylene-Propylene Rubber
100
Chlorosulfonated Polyethylene
3 - 10
Zinc Oxide 15 - 30
Hydrated Alumina 35 - 100
Vinyl Silane 1 - 3
Amorphous Silica 35 - 100
Antimony Oxide 2 - 10
Antioxidant 0.5 - 6
Peroxide Curing Agent 2 - 8
Curing Coagent 0 - 3
______________________________________
Claim 2
Dependent Claim
95 words
An electrical conductor insulated with a cured etylene-propylene rubber having improved resistance to flame and heat and having apt electrical and physical properties, consisting essentially of a metal conductor having thereon an insulating composition of the crosslink cured product, in approximate parts by weight, of: ______________________________________
Ethylene-Propylene Rubber
100
Chlorosulfonated Polyethylene
3 - 10
Zinc Oxide 15 - 30
Hydrated Alumina 35 - 100
Vinyl Silane 1 - 3
Amorphous Silica 35 - 100
Antimony Oxide 2 - 10
Antioxidant 0.5 - 6
Peroxide Curing Agent 2 - 8
Curing Coagent 0 - 3
______________________________________
Claim 3
Dependent Claim
58 words
The insulated electrical conductor of claim 1, wherein the insulating composition is the crosslink cured product, in approximate parts by weight, of: ______________________________________
Ethylene-Propylene Rubber
100
Chlorosulfonated Polyethylene
5
Zinc Oxide 20
Hydrated Alumina 60
Vinyl Silane 2
Amorphous Silica 60
Antimony Trioxide 5
Antioxidant 4
Processing Lubricant Oil 20
Peroxide Curing Agent 3.5
Curing Coagent 1.0
______________________________________
Claim 4
Dependent Claim
115 words
An electrical conductor insulated with a cured ethylene-propylene rubber having improved resistance to flame and heat and having apt electrical and physical properties, consisting essentially of a metal conductor having thereon an insulating composition of the crosslink cured product, in approximate parts by weight, of: ______________________________________
Ethylene-Propylene-Diene Terpolymer
100
Chlorosulfonated Polyethylene
3 - 10
Zinc Oxide 15 - 30
Hydrated Alumina 35 - 100
Vinyl Silane 1 - 3
Amorphous Silica 35 - 100
Antimony Trioxide 2 - 10
Dilaurylthiodiproprionate
0.25 - 3
Tetrakis methylene 3-(3',5'-di-tert-
butyl-4'-hydroxyphenyl)propionate!
methane 0.75 - 3
Titanium Dioxide 0 - 5
Processing Lubricant Oil 0 - 50
Dicumyl Peroxide 2 - 8
Trimethylol Propane Trimethacrylate
Coagent 0 - 3
______________________________________
Claim 5
Dependent Claim
115 words
An electrical conductor insulated with a cured ethylene-propylene rubber having improved resistance to flame and heat and having apt electrical and physical properties, consisting essentially of a metal conductor having thereon an insulating composition of the crosslink cured product, in approximate parts by weight, of: ______________________________________
Ethylene-Propylene-Diene Terpolymer
100
Chlorosulfonated Polyethylene
3 - 10
Zinc Oxide 15 - 30
Hydrated Alumina 35 - 100
Vinyl Silane 1 - 3
Amorphous Silica 35 - 100
Antimony Trioxide 2 - 10
Dilaurylthiodiproprionate
0.25 - 3
Tetrakis methylene 3-(3',5'-di-tert-
butyl-4'-hydroxyphenyl)propionate!
methane 0.75 - 3
Titanium Dioxide 0 - 5
Processing Lubricant Oil 0 - 50
Dicumyl Peroxide 2 - 8
Trimethylol Propane Trimethacrylate
Coagent 0 - 3
______________________________________
Claim 6
Dependent Claim
69 words
The insulated electrical conductor of claim 3, wherein the insulating composition is the crosslink cured product, in approximate parts by weight, of: ______________________________________
Ethylene-Propylene-Diene Terpolymer
100
Chlorosulfonated Polyethylene
5
Zinc Oxide 20
Hydrated Alumina 60
Vinyl Silane 1.7
Amorphous Silica 60
Antimony Trioxide 5
Dilaurylthiodiproprionate
1.0
Tetrakis methylene 3-(3',5'-di-tert-
butyl-4'-hydroxyphenyl) proprionate!
methane 1.0
Titanium Dioxide 1.0
Processing Lubricant Oil 20
Dicumyl Peroxide 3.5
Trimethylol Propane Trimethacrylate
Coagent 1.0
______________________________________
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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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |